CN103705198A - Signal transmission method applied to isolating circuit and isolating circuit - Google Patents
Signal transmission method applied to isolating circuit and isolating circuit Download PDFInfo
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- CN103705198A CN103705198A CN201310733487.XA CN201310733487A CN103705198A CN 103705198 A CN103705198 A CN 103705198A CN 201310733487 A CN201310733487 A CN 201310733487A CN 103705198 A CN103705198 A CN 103705198A
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Abstract
The invention discloses a signal transmission method applied to an isolating circuit. The method comprises the steps of conducting synchronous frequency boosting on a system clock signal to obtain a high-speed clock signal; converting a parallel digital signal into a series digital signal according to the high-speed clock signal; converting the series digital signal into a low-voltage differential signal; sending the low-voltage differential signal to an isolating device, wherein the isolating device has a symmetrical two-way transmission property and a high-frequency property by means of which high-voltage signals can be isolated from video information acquired by an electronic endoscope and control information of the rear end of an electronic endoscope system can be transmitted to the electronic endoscope, and the high-frequency property also enables the two-way transmission of a signal compatible with high-frequency bands to be achieved. The invention further discloses an isolating circuit which comprises the isolating device, and by means of the isolating device which has the symmetrical two-way transmission property and the high-frequency property, the two-way transmission of the signal compatible with high-frequency bands is achieved.
Description
Technical field
The present invention relates to armarium technical field, in particular, relate to a kind of method for transmitting signals and buffer circuit that is applied to buffer circuit.
Background technology
Electronic endoscope system is a kind of armarium that uses scope imaging technique to carry out medical diagnosis.The scope that is equipped with miniature image sensor enters in human body along human body natural's tract, gathers video information be back to system rear end and carries out signal processing and video picture.System rear end can also send various control information to scope.Therefore, signal is transmitted in both directions between fujinon electronic video endoscope rear end and scope.
In scope, have a large amount of electricity devices, therefore, the interior mirror circuit contacting with human body need to carry out electrical isolation with extraneous network source or earth terminal, to prevent that equipment fault electric leakage from jeopardizing human-body safety.At present, between scope and system rear end, be provided with an isolation strip, conventionally select optocoupler as isolating device.The opto-electronic conversion that optocoupler can carry out signal, has realized the electrical isolation between interior mirror circuit and network source or earth terminal, has also realized the transmission of signal in isolation strip.
But in technique scheme, signal can only one-way transmission in the path at an optocoupler place, if need to carry out reverse transmission, can only increase a reverse path, makes electronic endoscope system structure complicated.And optocoupler bandwidth is partially narrow, is about 10MHz, cannot meet the transmission requirement of broadband signal.
Summary of the invention
In view of this, the invention provides a kind of method for transmitting signals and buffer circuit that is applied to buffer circuit, signal path for multiplexing electronic endoscope system, in a signal path, realize the transmitted in both directions of compatible high frequency band signal, by implementing the technical program, can under the prerequisite that meets electric safety isolation, simplify the structure of electronic endoscope system, the simultaneously transmission of compatible high frequency band signal.
For achieving the above object, the invention provides following technical scheme:
A method for transmitting signals that is applied to buffer circuit, comprising:
By the synchronous raising frequency of clock signal of system, it is high-speed clock signal;
According to described high-speed clock signal, parallel digital signal is converted to serial digital signal;
Described serial digital signal is converted to low-voltage differential signal;
To isolating device, send described low-voltage differential signal, described isolating device has symmetric double to transmission characteristic and high frequency characteristics.
Wherein, described isolating device is capacitor or transformator.
Preferably,
The frequency band range of described capacitor is 50MHz to 1GHz;
The frequency band range of described transformator is 50MHz to 1GHz, and the primary and secondary turn ratio of described transformator is 1:1.
Wherein, the content of described parallel digital signal is video information or control information,
When the content of described parallel digital signal is video information, described method also comprises:
Analogue signal about described video information is converted to described parallel digital signal.
Preferably, describedly after sending described low-voltage differential signal, isolating device also comprises:
Low-voltage differential signal by described isolating device is carried out to demodulation, obtain described parallel digital signal and described high-speed clock signal.
The present invention, on the basis of above-mentioned disclosed a kind of method for transmitting signals that is applied to buffer circuit, also discloses a kind of buffer circuit, comprises isolating device, also comprises:
Raising frequency module, for being high-speed clock signal by the synchronous raising frequency of clock signal of system;
Parallel serial conversion module, for being converted to serial digital signal according to described high-speed clock signal by parallel digital signal;
Differential conversion module, for being converted to low-voltage differential signal by described serial digital signal;
Sending module, for sending described low-voltage differential signal to described isolating device, described isolating device has symmetric double to transmission characteristic and high frequency characteristics.
Wherein, described isolating device is capacitor or transformator.
Preferably,
The frequency band range of described capacitor is 50MHz to 1GHz;
The frequency band range of described transformator is 50MHz to 1GHz, and the primary and secondary turn ratio of described transformator is 1:1.
Wherein, the content of described parallel digital signal is video information or control information,
When the content of described parallel digital signal is video information, described circuit also comprises:
Analog-to-digital conversion module, for being converted to described parallel digital signal by the analogue signal about described video information.
Preferably, described circuit also comprises:
Demodulation module, for the low-voltage differential signal by described isolating device is carried out to demodulation, obtains described parallel digital signal and described high-speed clock signal.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of method for transmitting signals that is applied to buffer circuit, the method comprises: by the synchronous raising frequency of clock signal of system, be high-speed clock signal; According to described high-speed clock signal, parallel digital signal is converted to serial digital signal; Described serial digital signal is converted to low-voltage differential signal; To isolating device, send described low-voltage differential signal, described isolating device has symmetric double to transmission characteristic and high frequency characteristics, adopt isolating device can symmetric double to transmission characteristic and high frequency characteristics, the video information that fujinon electronic video endoscope can be obtained isolates high voltage signal by isolating device, also the control information of electronic endoscope system rear end can be sent to fujinon electronic video endoscope by isolating device, and high frequency characteristics realizes the transmitted in both directions of a road compatible high frequency band signal.The invention also discloses a kind of buffer circuit, comprise isolating device, by this, have and can symmetric double can realize the transmitted in both directions of a road compatible high frequency band signal to the isolating device of transmission characteristic and high frequency characteristics.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the disclosed a kind of method for transmitting signals flow chart that is applied to buffer circuit of the embodiment of the present invention;
Fig. 2 is the disclosed a kind of method for transmitting signals flow chart that is applied to buffer circuit of another embodiment of the present invention;
Fig. 3 is the disclosed a kind of method for transmitting signals flow chart that is applied to buffer circuit of another embodiment of the present invention;
Fig. 4 is the disclosed a kind of buffer circuit schematic diagram of the embodiment of the present invention;
Fig. 5 is the disclosed a kind of buffer circuit schematic diagram of another embodiment of the present invention;
Fig. 6 is the disclosed a kind of buffer circuit schematic diagram of another embodiment of the present invention;
Fig. 7 is the disclosed a kind of buffer circuit schematic diagram of another embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
On safety requires (medical treatment or common apparatus), the interface signal of requirement circuit can bear the high pressure isolation of 4000VRMS/1 minute, also to transmit the signal of broad frequency band simultaneously, as HD video information etc., this programme with flexibly, rationally, the method that forms of ball bearing made using reaches the requirement of safety isolation.
The invention discloses a kind of method for transmitting signals that is applied to buffer circuit, the method comprises: by the synchronous raising frequency of clock signal of system, be high-speed clock signal; According to described high-speed clock signal, parallel digital signal is converted to serial digital signal; Described serial digital signal is converted to low-voltage differential signal; To isolating device, send described low-voltage differential signal, described isolating device has symmetric double to transmission characteristic and high frequency characteristics, adopt isolating device can symmetric double to transmission characteristic and high frequency characteristics, the video information that fujinon electronic video endoscope can be obtained isolates high voltage signal by isolating device, also the control information of electronic endoscope system rear end can be sent to fujinon electronic video endoscope by isolating device, and high frequency characteristics realizes the transmitted in both directions of a road compatible high frequency band signal.The invention also discloses a kind of buffer circuit, comprise isolating device, by this, have and can symmetric double can realize the transmitted in both directions of a road compatible high frequency band signal to the isolating device of transmission characteristic and high frequency characteristics.
Embodiment mono-
Refer to accompanying drawing 1, Fig. 1 is the disclosed a kind of method for transmitting signals flow chart that is applied to buffer circuit of the embodiment of the present invention.The present embodiment discloses a kind of method for transmitting signals that is applied to buffer circuit, and the method specifically comprises the following steps;
Step 101: be high-speed clock signal by the synchronous raising frequency of clock signal of system;
Step 102: parallel digital signal is converted to serial digital signal according to high-speed clock signal;
Step 103: serial digital signal is converted to low-voltage differential signal;
Step 104: send low-voltage differential signal to isolating device, isolating device has symmetric double to transmission characteristic and high frequency characteristics.
Described there is symmetric double can be for thering is arbitrarily symmetric double to the isolating device of transmission characteristic and high frequency characteristics to the isolating device of transmission characteristic and high frequency characteristics, its frequency band range can be 50MHz to 1.5GHz, using isolating device as isolation area, its both sides form power supply area and isolation area, wherein power supply area internal circuit is communicated with alternating current power supply, the circuit that needs electrical isolation is set in isolation area, can, by loss-free transmission such as video informations, also the control information of electronic endoscope system rear end can be sent to fujinon electronic video endoscope by isolating device.
Preferably, isolating device described above is capacitor or transformator, and the frequency band range of described capacitor is 50MHz to 1GHz; The frequency band range of described transformator is 50MHz to 1GHz, and the primary and secondary turn ratio of described transformator is 1:1.
Described capacitor adopts the capacitor that frequency band span is 50MHz to 1GHz, transmission bandwidth can be expanded to frequency band 50MHz to 1GHz; The transformator that described transformer adopting frequency band span is 50MHz to 1GHz, can expand to transmission bandwidth frequency band 50MHz to 1GHz.
The invention discloses a kind of method for transmitting signals that is applied to buffer circuit, the method comprises: by the synchronous raising frequency of clock signal of system, be high-speed clock signal; According to high-speed clock signal, parallel digital signal is converted to serial digital signal; Serial digital signal is converted to low-voltage differential signal; To isolating device, send low-voltage differential signal, isolating device has symmetric double to transmission characteristic and high frequency characteristics, adopt isolating device can symmetric double to transmission characteristic and high frequency characteristics, the video information that fujinon electronic video endoscope can be obtained isolates high voltage signal by isolating device, also the control information of electronic endoscope system rear end can be sent to fujinon electronic video endoscope by isolating device, and high frequency characteristics realizes the transmitted in both directions of a road compatible high frequency band signal.
Embodiment bis-
Refer to accompanying drawing 2, Fig. 2 is the disclosed a kind of method for transmitting signals flow chart that is applied to buffer circuit of another embodiment of the present invention.On the disclosed basis of above-described embodiment, concrete, the content of described parallel digital signal is video information or control information, and when the content of described parallel digital signal is video information, described method step also comprises:
Step 100: the analogue signal about video information is converted to parallel digital signal.
The present embodiment, when input signal is video information, because video information is analogue signal, needs first analogue signal to be converted to digital signal, just can transmit, and is conducive to the smooth transmission of video information.
Embodiment tri-
Refer to accompanying drawing 3, Fig. 3 is the disclosed a kind of method for transmitting signals flow chart that is applied to buffer circuit of another embodiment of the present invention.On the disclosed basis of Fig. 1 and Fig. 2, concrete, described further comprising the steps of after isolating device sends described low-voltage differential signal in the above-described embodiments:
Step 105: the low-voltage differential signal by isolating device is carried out to demodulation, obtain parallel digital signal and high-speed clock signal.
The present embodiment also comprises after sending described low-voltage differential signal to isolating device described: the low-voltage differential signal by described isolating device is carried out to demodulation, obtain described parallel digital signal and described high-speed clock signal.Low-voltage differential signal is carried out to demodulation, obtain parallel data signal and the high-speed clock signal of input, make that initial data is loss-free isolates transmission.
Embodiment tetra-
Concrete, referring to accompanying drawing 4, Fig. 4 is the disclosed a kind of buffer circuit schematic diagram of the embodiment of the present invention.The embodiment of the invention discloses a kind of buffer circuit, comprise isolating device 1, also comprise: raising frequency module 2, for being high-speed clock signal by the synchronous raising frequency of clock signal of system; Parallel serial conversion module 3, for being converted to serial digital signal according to high-speed clock signal by parallel digital signal; Differential conversion module 4, for being converted to low-voltage differential signal by serial digital signal; Sending module 5, for sending low-voltage differential signal to isolating device, isolating device has symmetric double to transmission characteristic and high frequency characteristics.
Preferably, isolating device 1 described above can be capacitor or transformator; The frequency band range of described capacitor is 50MHz to 1GHz; The frequency band range of described transformator is 50MHz to 1GHz, and the primary and secondary turn ratio of described transformator is 1:1.
The disclosed a kind of buffer circuit of the present embodiment, comprises isolating device, by this, is had and can symmetric double can be realized the transmitted in both directions of a road compatible high frequency band signal to the isolating device of transmission characteristic and high frequency characteristics.
Embodiment five
Refer to accompanying drawing 5, Fig. 5 is the disclosed a kind of buffer circuit schematic diagram of another embodiment of the present invention.On the disclosed a kind of buffer circuit of above-described embodiment basis, between described parallel serial conversion module 3 and described differential conversion module 4, also comprise: DC balance module 6, there is scrambler character, for realizing the randomization of serial digital signal, with reduction signal occupied bandwidth, improve the performance indications of buffer circuit.
In the present embodiment, between described parallel serial conversion module 3 and described differential conversion module 4, also comprise: DC balance module 6, this module has scrambler character, for realizing the randomization of serial digital signal, to reduce signal occupied bandwidth, improve the performance indications of buffer circuit.The serial digital signal that this module converts described parallel serial conversion module to carries out randomization, realize DC balance, the threshold value setting of described differential conversion module is simplified, reduce signal occupied bandwidth, the performance indications that improve buffer circuit, further realize the transmission of high-frequency band signals.
Embodiment six
Refer to accompanying drawing 6, Fig. 6 is the disclosed a kind of buffer circuit schematic diagram of another embodiment of the present invention.On the disclosed a kind of buffer circuit of above-described embodiment basis, the content of described parallel digital signal is video information or control information, when the content of described parallel digital signal is video information, described circuit also comprises: analog-to-digital conversion module 7, and for the analogue signal about video information is converted to parallel digital signal.
The present embodiment, when input signal is video information, because video information is analogue signal, needs an analog-to-digital conversion module now analogue signal to be converted to digital signal, just can transmit, and is conducive to the smooth transmission of video information.
Embodiment seven
Refer to accompanying drawing 7, Fig. 7 is the disclosed a kind of buffer circuit schematic diagram of another embodiment of the present invention.On the disclosed basis of Fig. 4 and Fig. 5, concrete, described circuit also comprises in the above-described embodiments:
The present embodiment also comprises after sending module 5: demodulation module 8, the low-voltage differential signal by described isolating device is carried out to demodulation, and obtain described parallel digital signal and described high-speed clock signal.Low-voltage differential signal is carried out to demodulation, obtain parallel data signal and the high-speed clock signal of input, make that initial data is loss-free isolates transmission.
For transformator, high voltage signal as common-mode signal cannot form loop in transformer, therefore cannot pass through smoothly transformer coupled to secondary, therefore, common-mode signal can only be capacitively coupled to transformator another side by the primary and secondary parasitic contribution of transformator, utilize the transfer characteristic of transformator electricity-magnetic-electricity, on magnetic circuit, with high-strength insulation material, realize the reliable insulation between primary and secondary, realize buffer action.
For capacitor, the positive negative signal of low-voltage differential signal is coupled to power supply area by a high withstand voltage low capacity electric capacity 1pF-10pF respectively, low-voltage differential signal is that the high-frequency signal that frequency is very high can be smoothly by the electric capacity of low capacity, and the low-frequency ac voltage signal that frequency is 50Hz is difficult to by the electric capacity of low capacity, therefore play and stop low-frequency ac voltage signal by buffer circuit district, realize buffer action.
In addition, the withstand voltage scope of described transformator is 2KV to 4KV.
The Anti-voltage transformer that scope that described transformer adopting is withstand voltage is 2KV to 4KV can carry out the transmission of video information etc. in withstand voltage scope.
Preferably, above-mentioned transformator also can be with the Ethernet transformator with high strength isolating power.
Can be in ethernet device for ethernet network transformator, when transmission range is distant, can strengthen signal transmission, make it can transmission range farther, in addition, make ethernet network transformator and external isolation, capacity of resisting disturbance strengthens, and its Main Function is better to carry out high voltage signal isolation.
The present invention utilizes the transformator that frequency band span is 50MHz to 1GHz, and the frequency band span electric capacity that is 50MHz to 1GHz, because its high operate frequency characteristic and high operate frequency characteristic realize the transmission of wider bandwidth, it can reach the bandwidth range of 50MHz to 1GHz; Simultaneously, utilize the transfer characteristic of transformator electricity-magnetic-electricity, on magnetic circuit, with high-strength insulation material, realize the reliable insulation between primary and secondary, or utilize the characteristic of electric capacity low impedance at high frequency low-frequency high-impedance, the reliable insulation of low-frequency ac voltage is passed through to high-frequency signal smoothly, when can transmit smoothly the video information etc. of high bandwidth, realized the high-strength insulation isolation between fujinon electronic video endoscope and network source or earth terminal.
Concrete, when above-mentioned isolating device is transformator, isolation area by all signal digitalized after, by raising frequency module, system clock is obtained to high-speed clock signal by synchronous raising frequency, under the driving of high-speed clock signal, converting low-voltage differential signal to, modulate, then low-voltage differential signal is sent, low-voltage differential signal has two-forty, high anti-jamming capacity.This low-voltage differential signal can pass through high bandwidth smoothly, high primary and secondary is withstand voltage isolated form differential mode transformator, but the high voltage signal as common-mode signal cannot form loop in transformer, cannot pass through smoothly transformer coupled to secondary, therefore, common-mode signal can only be capacitively coupled to transformator another side by the primary and secondary parasitic contribution of transformator, but because the distribution capacity of transformator is very little, therefore actual high-voltage leakage current is very little, and the electric leakage of can not breaking down damages human body.
With the primary and secondary of transformator, can symmetry characteristic (the transformator primary and secondary of turn ratio 1:1 turns around by characteristic the same) have solved the problem that optocoupler can only one-way transmission of using, and the problem of the optical coupling isolation circuit narrow bandwidth of the high operate frequency characteristic of transformator solution, if need to carry out the transmission of two-way signaling, need to use two optocouplers,, and the present invention only needs a transformator just can complete two-way high-frequency isolation transmission.
After video informations etc. are passed through transformator by electromagnetic mode, then by demodulation module, low-voltage differential signal is reduced into low-voltage differential signal, clock also reverts to the high-speed clock signal before transmission, thereby has completed the isolation transmission of video information etc.
Concrete, when above-mentioned isolating device is electric capacity, isolation area all signal digitalized after, by raising frequency module, system clock is obtained to high-speed clock signal by Phase Locked Loop Synchronization raising frequency, under the driving of high-speed clock signal, converting low-voltage differential signal to, modulate, then low-voltage differential signal is sent, low-voltage differential signal has two-forty, high anti-jamming capacity.The positive negative signal of this low-voltage differential signal is coupled to power supply area by a high withstand voltage low capacity electric capacity 1pF-10pF respectively, low-voltage differential signal is that the high-frequency signal that frequency is very high can be smoothly by the electric capacity of low capacity, and the low-frequency ac voltage signal that frequency is 50Hz is difficult to by the electric capacity of low capacity, therefore play and stop low-frequency ac voltage signal to pass through isolation area, can be smoothly the video information etc. of wanting transmission being sent to power supply area by electric capacity processes, to being transferred to the low-voltage differential signal of power supply area, enter demodulation, restore original low-voltage differential signal and the high-speed clock signal of primary frequency.
With the two poles of the earth symmetry characteristic of electric capacity, (electric capacity is formed by fill insulants in the middle of two electrodes, therefore which side which side high frequency electric enters and goes out all the same from) solved the problem that optocoupler can only one-way transmission, and the problem of the optical coupling isolation circuit narrow bandwidth of electric capacity high operate frequency characteristic (frequency more high impedance is lower) solution, if need to carry out the transmission of two-way signaling, need to use two optocouplers, and the present invention only needs an electric capacity just can complete two-way high-frequency isolation transmission.
After video informations etc. are passed through electric capacity by coupled modes, then by demodulation module, low-voltage differential signal is reduced into low-voltage differential signal, clock also reverts to the high-speed clock signal before transmission, thereby has completed the isolation transmission of video information etc.
In sum: the invention discloses a kind of method for transmitting signals that is applied to buffer circuit, the method comprises: by the synchronous raising frequency of clock signal of system, be high-speed clock signal; According to described high-speed clock signal, parallel digital signal is converted to serial digital signal; Described serial digital signal is converted to low-voltage differential signal; To isolating device, send described low-voltage differential signal, described isolating device has symmetric double to transmission characteristic and high frequency characteristics, adopt isolating device can symmetric double to transmission characteristic and high frequency characteristics, the video information that fujinon electronic video endoscope can be obtained isolates high voltage signal by isolating device, also the control information of electronic endoscope system rear end can be sent to fujinon electronic video endoscope by isolating device, and high frequency characteristics realizes the transmitted in both directions of a road compatible high frequency band signal.The invention also discloses a kind of buffer circuit, comprise isolating device, by this, have and can symmetric double can realize the transmitted in both directions of a road compatible high frequency band signal to the isolating device of transmission characteristic and high frequency characteristics.
The present embodiment utilizes the transformator that frequency band span is 50MHz to 1GHz, and the frequency band span electric capacity that is 50MHz to 1GHz, because its high operate frequency characteristic and high operate frequency characteristic realize the transmission of wider bandwidth, it can reach the bandwidth range of 50MHz to 1GHz; Simultaneously, utilize the transfer characteristic of transformator electricity-magnetic-electricity, on magnetic circuit, with high-strength insulation material, realize the reliable insulation between primary and secondary, or utilize the characteristic of electric capacity low impedance at high frequency low-frequency high-impedance, the reliable insulation of low-frequency ac voltage is passed through to high-frequency signal smoothly, when can transmit smoothly the video information etc. of high bandwidth, realized the high-strength insulation isolation between fujinon electronic video endoscope and network source or earth terminal.
The present invention is usingd transformator or electric capacity as protection against electric shock high-strength insulating isolating device, and by make digital logic signal signal be delivered to the other end of isolation by electromagnetism (transformator) or field coupling (electric capacity) mode smoothly to the modulation of signal, also control information can be carried out to the transmission of data from the other end, be realized the two-way high-frequency transmission of isolation.
Disclosed a kind of method for transmitting signals and the buffer circuit that is applied to buffer circuit of the embodiment of the present invention, can be applied to electronic endoscope system, also can be applied in other electrical systems that need to isolate.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a method for transmitting signals that is applied to buffer circuit, is characterized in that, comprising:
By the synchronous raising frequency of clock signal of system, it is high-speed clock signal;
According to described high-speed clock signal, parallel digital signal is converted to serial digital signal;
Described serial digital signal is converted to low-voltage differential signal;
To isolating device, send described low-voltage differential signal, described isolating device has symmetric double to transmission characteristic and high frequency characteristics.
2. method according to claim 1, is characterized in that, described isolating device is capacitor or transformator.
3. method according to claim 2, is characterized in that,
The frequency band range of described capacitor is 50MHz to 1GHz;
The frequency band range of described transformator is 50MHz to 1GHz, and the primary and secondary turn ratio of described transformator is 1:1.
4. according to the method described in claims 1 to 3 any one, it is characterized in that, the content of described parallel digital signal is video information or control information,
When the content of described parallel digital signal is video information, described method also comprises:
Analogue signal about described video information is converted to described parallel digital signal.
5. according to the method described in claims 1 to 3 any one, it is characterized in that, describedly after isolating device sends described low-voltage differential signal, also comprise:
Low-voltage differential signal by described isolating device is carried out to demodulation, obtain described parallel digital signal and described high-speed clock signal.
6. a buffer circuit, comprises isolating device, it is characterized in that, also comprises:
Raising frequency module, for being high-speed clock signal by the synchronous raising frequency of clock signal of system;
Parallel serial conversion module, for being converted to serial digital signal according to described high-speed clock signal by parallel digital signal;
Differential conversion module, for being converted to low-voltage differential signal by described serial digital signal;
Sending module, for sending described low-voltage differential signal to described isolating device, described isolating device has symmetric double to transmission characteristic and high frequency characteristics.
7. circuit according to claim 6, is characterized in that, described isolating device is capacitor or transformator.
8. circuit according to claim 7, is characterized in that,
The frequency band range of described capacitor is 50MHz to 1GHz;
The frequency band range of described transformator is 50MHz to 1GHz, and the primary and secondary turn ratio of described transformator is 1:1.
9. according to the circuit described in claim 6 to 8 any one, it is characterized in that, the content of described parallel digital signal is video information or control information,
When the content of described parallel digital signal is video information, described circuit also comprises:
Analog-to-digital conversion module, for being converted to described parallel digital signal by the analogue signal about described video information.
10. according to the circuit described in claim 6 to 8 any one, it is characterized in that, described circuit also comprises:
Demodulation module, for the low-voltage differential signal by described isolating device is carried out to demodulation, obtains described parallel digital signal and described high-speed clock signal.
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Cited By (4)
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| CN105599298A (en) * | 2015-12-31 | 2016-05-25 | 哈尔滨工业大学 | 3D printing head mechanism control system for multi-freedom-degree 3D printing robot and control method of system |
| CN106264429A (en) * | 2015-06-26 | 2017-01-04 | 因德斯马特有限公司 | Endoscopic apparatus and the image treatment method of endoscopic apparatus |
| CN107450378A (en) * | 2017-09-14 | 2017-12-08 | 浙江国自机器人技术有限公司 | A kind of controller and robot |
| WO2022195647A1 (en) * | 2021-03-15 | 2022-09-22 | オリンパスメディカルシステムズ株式会社 | Endoscope system and scope |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61265987A (en) * | 1985-05-20 | 1986-11-25 | Olympus Optical Co Ltd | Television camera device |
| JPH05228112A (en) * | 1992-02-25 | 1993-09-07 | Fuji Photo Optical Co Ltd | Electronic endoscope system |
| JPH09154813A (en) * | 1995-12-04 | 1997-06-17 | Olympus Optical Co Ltd | Electronic endoscope device |
| US5716323A (en) * | 1995-04-05 | 1998-02-10 | Karl Storz Imaging | Electrical isolation of endoscopic video camera |
| CN102155211A (en) * | 2011-01-05 | 2011-08-17 | 中国海洋石油总公司 | Circuit for monitoring well kick at deepwater drilling mud line |
| CN102629968A (en) * | 2012-04-11 | 2012-08-08 | 湖南镭目科技有限公司 | Image processing device and method as well as system |
| JP2013132385A (en) * | 2011-12-26 | 2013-07-08 | Olympus Corp | Electronic endoscope apparatus |
| CN103262435A (en) * | 2010-10-28 | 2013-08-21 | 耳蜗有限公司 | Magnetic induction communication system for implantable medical device |
-
2013
- 2013-12-26 CN CN201310733487.XA patent/CN103705198B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61265987A (en) * | 1985-05-20 | 1986-11-25 | Olympus Optical Co Ltd | Television camera device |
| JPH05228112A (en) * | 1992-02-25 | 1993-09-07 | Fuji Photo Optical Co Ltd | Electronic endoscope system |
| US5716323A (en) * | 1995-04-05 | 1998-02-10 | Karl Storz Imaging | Electrical isolation of endoscopic video camera |
| JPH09154813A (en) * | 1995-12-04 | 1997-06-17 | Olympus Optical Co Ltd | Electronic endoscope device |
| CN103262435A (en) * | 2010-10-28 | 2013-08-21 | 耳蜗有限公司 | Magnetic induction communication system for implantable medical device |
| CN102155211A (en) * | 2011-01-05 | 2011-08-17 | 中国海洋石油总公司 | Circuit for monitoring well kick at deepwater drilling mud line |
| JP2013132385A (en) * | 2011-12-26 | 2013-07-08 | Olympus Corp | Electronic endoscope apparatus |
| CN102629968A (en) * | 2012-04-11 | 2012-08-08 | 湖南镭目科技有限公司 | Image processing device and method as well as system |
Non-Patent Citations (1)
| Title |
|---|
| 何进: "浅谈数字隔离器件的选型与应用", 《电子设计应用》 * |
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| CN106264429A (en) * | 2015-06-26 | 2017-01-04 | 因德斯马特有限公司 | Endoscopic apparatus and the image treatment method of endoscopic apparatus |
| CN106264429B (en) * | 2015-06-26 | 2018-04-17 | 因德斯马特有限公司 | Endoscopic apparatus |
| CN105599298A (en) * | 2015-12-31 | 2016-05-25 | 哈尔滨工业大学 | 3D printing head mechanism control system for multi-freedom-degree 3D printing robot and control method of system |
| CN105599298B (en) * | 2015-12-31 | 2017-11-17 | 哈尔滨工业大学 | It is a kind of towards the 3D printing head mechanism control system of multiple degrees of freedom 3D printing robot and the control method of the system |
| CN107450378A (en) * | 2017-09-14 | 2017-12-08 | 浙江国自机器人技术有限公司 | A kind of controller and robot |
| WO2022195647A1 (en) * | 2021-03-15 | 2022-09-22 | オリンパスメディカルシステムズ株式会社 | Endoscope system and scope |
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| CN103705198B (en) | 2016-05-04 |
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