CN103973298B - Vibration starting circuit - Google Patents
Vibration starting circuit Download PDFInfo
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- CN103973298B CN103973298B CN201310032129.6A CN201310032129A CN103973298B CN 103973298 B CN103973298 B CN 103973298B CN 201310032129 A CN201310032129 A CN 201310032129A CN 103973298 B CN103973298 B CN 103973298B
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Abstract
The invention discloses one kind to vibrate starting circuit, for oscillator, including vibration initiator and oscillator signal detector.Oscillator signal detector, the output signal of reception oscillator output, if detecting, the level of output signal is substantially fixed, exports the initial signal of enable.Vibrate initiator, when initial signal is enabled, then produce opposite polarity the first input signal and the second input signal to oscillator first input end and the second input.Accordingly, it can ensure that the generation of oscillator vibration by the vibration starting circuit of the present invention and reduce the time of foundation vibration.
Description
Technical field
The present invention relates to one kind to vibrate starting circuit, can ensure that more particularly to one kind and is vibrated caused by oscillator vibration
Beginning circuit.
Background technology
The maximum difference of oscillator and other circuits, is exactly that it only has output signal, but do not have input signal.Oscillator
Output signal can be produced in the case of without input signal, but energy must be provided by the external world so that oscillator maintains vibration.
Method inside oscillator by placing amplifier, and the energy needed for amplifier is then from external dc source.
As shown in figure 1, it is the circuit diagram of existing oscillator 1.Because oscillator is necessarily a loop, and its principle is
Based on positive feedback, by noise（noise）Amplify repeatedly to reach required vibration.Noise N1, N2 are first defeated via oscillator
Enter end 11, the second input 12 inputs, by output end 13,14 export after, feed back to first input end 11, the second input 12.
However, oscillator 1 is often due to noise N1, N2 of injection are too small and easily produce the problem of vibration fails.Furthermore by injection
Noise N1, N2 also establish the problem of duration of oscillation is long to oscillator to produce vibration.
Accordingly, how a kind of vibration starting circuit is provided, it is ensured that the generation of oscillator vibration, and reduce oscillator vibration and build
The vertical time, it has also become industry urgent problem to be solved at present.
The content of the invention
In view of above-mentioned, the embodiment of the present invention proposes a kind of vibration starting circuit, for oscillator, including vibration initiator with
And oscillator signal detector.
Oscillator signal detector, the output signal of reception oscillator output, if detecting, the level of output signal is substantial
It is fixed, then export the initial signal of enable.
Initiator is vibrated, when initial signal is enabled, then the first input signal and the second input for producing opposite polarity are believed
Number to oscillator first input end and the second input.
Accordingly, it can ensure that input to oscillator first input end and the second input by the vibration starting circuit of the present invention
Signal there is opposite polarity so that oscillator produce vibration, and can reduce oscillator establish vibration time.In addition, vibrate
The detection function that beginning circuit has can avoid vibration from producing interference to oscillator after establishing.
Brief description of the drawings
Fig. 1 is the circuit diagram of existing oscillator；
Fig. 2 is the schematic diagram that present invention vibration originates circuit；And
Fig. 3 is the circuit diagram that present invention vibration originates circuit.
Embodiment
The ordinal term used in the claims, such as " first ", " second " etc. correct claim element, its
Body does not represent priority, precedence or order any between a claim element, or the step of perform method
When time sequencing, but distinguish the claim element with some title with another with mutually of the same name only as sign
The element (but in the ordinal term) of title, to distinguish the claim element.
Schematic diagrames of the Fig. 2 according to the vibration starting circuit 2 of one embodiment of the invention.Vibration starting circuit 2 is used for oscillator
1, including vibration initiator 21 and oscillator signal detector 22.The output end 13 of the reception oscillator 1 of oscillator signal detector 22 or
The the first output signal O1 or the second output signal O2 that output end 14 is exported, it is defeated with the second of Rreceive output end 14 in this example
Go out exemplified by signal O2.If oscillator signal detector 22 detects that the second output signal O2 level is substantially fixed, vibration is represented
Device 1 not yet vibrates, therefore oscillator signal detector 22 exports the initial signal S of enable to initiator 21 is vibrated, and vibrates initiator
The the first input signal IN1 and the second input signal IN2 of 21 generation opposite polarities are to the first input end 11 of oscillator 1 and the
Two inputs 12 so that oscillator 1 can start to vibrate；When oscillator signal detector 22 detects the first output of oscillator 1
When signal O1 or the second output signal O2 have opposite polarity, represent that oscillator 1 successfully produces vibration, therefore oscillator signal is examined
Survey device 22 and export the initial signal S of disabled to initiator 21 is vibrated, vibration initiator 21 then disconnects to be electrically connected with oscillator 11
Connect.
Vibration starting circuit 2 also originates output end 214 comprising the first starting output end 211 and second.First starting is defeated
Go out the starting electrical connection vibration initiator 21 of output end 214 of end 211 and second, and be electrically connected the first input end of oscillator 1
11 and second input 12.When vibration initiator 21 receives the initial signal S of enable, vibration initiator 21 is via the first starting
Output end 211 receives the first input signal IN1, and produces the second input signal IN2 of opposite polarity, is exported via the second starting
End 214 inputs the second input signal IN2 to the second input 12 of oscillator 1 so that oscillator 1 can start to vibrate.In addition,
First starting output end 211 and second, which originates output end 214, can also be electrically connected the second input 12 and first of oscillator 1
Input 11, is not limited thereto in the present invention.
Vibration starting circuit 2 also includes power end Vdd and earth terminal GND（It is illustrated in respectively in Fig. 3）.Power end Vdd
And earth terminal GND be electrically connected to oscillator signal detector 22 and vibration initiator 21 so that power supply via power end Vdd provide to
Oscillator signal detector 22 and vibration initiator 21, detailed annexation can refer to Fig. 3, repeated no more in this.
Oscillator signal detector 22 includes input signal actuating switch 222 and logic switch 223.Input signal actuating is opened
222 electric connection of power supply end Vdd and earth terminal GND, the second output signal O2 that reception oscillator 1 exports are closed, and it is defeated according to second
Go out signal O2 level output logic signal E.In this embodiment, the input signal actuating switch output end of 222 reception oscillator 1
14 output the second output signal O2, but in other embodiments input signal actuating switch 222 also can reception oscillator 1 export
First output signal O1 of the output of end 13.Logic switch 223 electrically connects input signal actuating switch 222, and according to logical signal E
Enable initial signal S.
Circuit diagrams of the Fig. 3 according to the vibration starting circuit 2 of one embodiment of the invention.Vibrating initiator 21 includes switching switch
212 and first phase inverter 213.First phase inverter 213 has input and output end, for making signal inversion.Switching switch 212
The starting output end 211, second of electrical connection first originates output end 214 and earth terminal GND, and receives initial signal S.Work as starting
When signal S is enabled, the first input end 11 of oscillator 1 is electrically connected to by switching switch 212 via the first starting output end 211
The input of first phase inverter 213；When initial signal S disableds, switching switch 212 disconnects the electrical connection with oscillator 1.
Switching switch 212 includes multiplexer 212A and transmission gate 212B.Multiplexer 212A include first input end 212A1,
Second input 212A2, control terminal 212A3 and output end 212A4.First input end 212A1 electrical connections the first starting output
End 211, the second input 212A2 electrical connections earth terminal GND, control terminal 212A3 receive initial signal S, and output end 212A4 is electrically connected
Connect the input of the first phase inverter 213.Transmission gate 212B is electrically connected to output end and the second starting output of the first phase inverter 213
Between end 214.
From the above, the initial signal that switching switch 212 exports according to the logic switch 223 of oscillator signal detector 22 is received
S switches multiplexer 212A first input ends 212A1 and the second input 212A2 connection status.Furthermore, starting is worked as
Signal S is enabled, and first input end 212A1 is electrically connected to output end 212A4 by multiplexer 212A selections so that oscillator 1 the
First input signal IN1 of one input 11 is via the first starting output end 211, multiplexer 212A first input end 212A1
And output end 212A4 is inputted to the input of the first phase inverter 213, to produce the of opposite polarity by the first phase inverter 213
Two input signal IN2, and transmission gate 212B from the output end of the first phase inverter 21 by conducting, the second starting output end 214
And second input 12 transmit the second input signal IN2 to oscillator 1；If initial signal S disableds, multiplexer 212A choosings
Select and the second input 212A2 is electrically connected to its output end 212A4, and transmission gate 212B is also disconnected so that vibration starting
Device 21 disconnects the electrical connection with oscillator 1.
The input of first phase inverter 213 receives the signal of multiplexer 212A output end 212A4 outputs, in this embodiment
In, input receives the first input signal IN1, to produce the second input signal IN2 of opposite polarity from output end to transmission gate
212B。
Transmission gate 212B is used for transmission signal, is the second input signal IN2 of transmission so that second is defeated in this embodiment
Enter signal IN2 to input to the second input 12 of oscillator 1 from the second starting output end 214.In addition, in embodiments of the invention
In, the first input signal IN1 and the second input signal IN2 can be such as sine wave, therefore, exemplified by the first input signal IN1
During such as sine wave, the first phase inverter 213 then produces the second input signal IN2 in contrast to sine wave polarity.
From the above, when oscillator signal detector 22 detects the output letters of the first output signal O1 or second of oscillator 1
When number O2 has opposite polarity, represent that oscillator 1 successfully produces vibration, initial signal S disableds, switching switch 212 will
Disconnect the electrical connection of vibration initiator 21 and oscillator 11；When oscillator signal detector 22 detects the first output signal O1 or
When two output signal O2 level is substantially fixed, initial signal S is enabled, and the multiplexer 212A of switching switch 212 is by first
Starting output end 211 is electrically connected to the input of the first phase inverter 213 so that the input signal of the second starting output end 214 with
The input signal of first starting output end 211 is anti-phase, that is, in the first input signal IN1 and the second input signal IN2 anti-phase,
Oscillator 11 starts to vibrate.
The logic switch 223 of oscillator signal detector 22 includes NAND gate 223A and the 3rd phase inverter 223B.
NAND gate 223A has the first logic signal input end 223A1, the second logic signal input end 223A2 and output end
223A3.In addition, above-mentioned logical signal E includes the first logical signal E1 and the second logical signal E2, the input of the first logical signal
End 223A1 and the second logic signal input end 223A2 receives the first logical signal E1 and the second logical signal E2 to produce respectively
One logic judgment result.3rd phase inverter 223B has input and output end, input electrical connection NAND gate 223A's
For output end 223A3 to receive logic judgment result, output end exports anti-phase logic judgment result to produce initial signal S to shaking
Swing the switching switch of initiator 21 212A control terminal 212A3.
The input signal actuating switch 222 of oscillator signal detector 22 includes the first input signal level pull-up switch
222A, the second phase inverter 222C, the second input signal level pull-up switch 222B, the first input signal level maintainer 222D with
And the second input signal level maintainer 222E.Need it is specifically intended that switch described herein its there is " unlatchings " and " pass
Close " characteristic, represent that switch produces the state of " conducting " or " being not turned on " for signal, those skilled in the art should be appreciated that it
Meaning, it is not described in detail in this.
First input signal level pull-up switch 222A electric connection of power supply end Vdd and there is input 222A1 and output end
222A2.Output end 222A2 electrical connection NAND gates 223A the first logic signal input end 223A1, input 222A1 connect
Receive the second output signal O2 that oscillator 1 exports so that the first input signal level pull-up switch 222A believes according to the second output
Number O2 level is turned on and off, to produce the first logical signal E1 to the first of NAND gate 223A from output end 222A2
Logic signal input end 223A1.In addition, in this embodiment, when the first input signal level pull-up switch 222A is opened, the
One logical signal E1 is power supply（Vdd）Level（High levle）.
Second phase inverter 222C has input and output end, and input electrically connects the first input signal level pull-up switch
222A input 222A1, and the second output signal O2 that reception oscillator 1 exports, to produce the first anti-phase output letter
Number O1 is to output end.
Second input signal level pull-up switch 222B electric connection of power supply end Vdd and there is input 222B1 and output end
222B2.Output end 222B2 electrical connection NAND gates 223A the second logic signal input end 223A2, input 222B1 is certainly
Second phase inverter 222C output ends receive the first anti-phase output signal O1 so that the second input signal level pull-up switch 222B
It is turned on and off according to the level of the first anti-phase output signal O1, to produce the second logical signal E2 from output end 222B2
To NAND gate 223A the second logic signal input end 223A2.In this embodiment, when the second input signal level pulls up
When switching 222B unlatchings, the second logical signal E2 is power level.
First input signal level maintainer 222D is electrically connected to the first logic signal input end 223A1 and earth terminal
Between GND, for when the first input signal level pull-up switch 222A is closed, opening the first input signal level maintainer
222D is to produce the first logical signal E1 to the first logic signal input end 223A1.In this embodiment, when the first input signal
When level maintainer 222D is opened, the first logical signal E1 is ground connection（GND）Level（Low level）.
Second input signal level maintainer 222E is electrically connected to the second logic signal input end 223A2 and earth terminal
Between GND, for when the second input signal level pull-up switch 222B is closed, opening the second input signal level maintainer
222E is to produce the second logical signal E2 to the second logic signal input end 223A2.In this embodiment, when the second input signal
When level maintainer 222E is opened, the second logical signal E2 is ground connection level.
From the above, the first logical signal E1 and the second logical signal E2 power level and ground connection level are according to the
One input signal level pull-up switch 222A, the second input signal level pull-up switch 222B, the first input signal level maintain
State when being turned on and off between device 222D and the second input signal level maintainer 222E produces, people in the art
Member is not described in detail it should be appreciated that its meaning in this.
In addition, when the first input signal level pull-up switch 222A and the second input signal level pull-up switch 222B according to
The level for the second output signal O2 that oscillator 1 exports is opened so that caused first logical signal E1 and the second logical signal
When E2 is power level, by the logic judgment result of the above-mentioned output of logic switch 223 ground connection level to the 3rd phase inverter
223B input, and by the 3rd phase inverter 223B inverted logics judged result to produce the initial signal S of power level.
When the first input signal level pull-up switch 222A and the second input signal level pull-up switch 222B are according to vibration
The level for the second output signal O2 that device 1 exports is closed so that the first logical signal E1 and the second logical signal E2 is accurate for ground connection
Position when, by the above-mentioned out-put supply level of logic switch 223 logic judgment result to the 3rd phase inverter 223B input,
And by the 3rd phase inverter 223B inverted logics judged result with produce ground connection level initial signal S.
When the first input signal level pull-up switch 222A and the second input signal level pull-up switch 222B are according to vibration
The the second output signal O2 level that device 1 exports is separately turned on and closed so that the first logical signal E1 is power level and the
Two logical signal E2 for ground connection level when, by the logic judgment result of the above-mentioned out-put supply level of logic switch 223 to the
Three phase inverter 223B input, and make logic judgment result anti-phase to produce the starting of ground connection level by the 3rd phase inverter 223B
Signal S.
When the first input signal level pull-up switch 222A and the second input signal level pull-up switch 222B are according to vibration
The the second output signal O2 level that device 1 exports is closed and opened respectively so that the first logical signal E1 is ground connection level and the
When two logical signal E2 are power level, by the logic judgment result of the above-mentioned out-put supply level of logic switch 223 to
Three phase inverter 223B input, and make logic judgment result anti-phase to produce the starting of ground connection level by the 3rd phase inverter 223B
Signal S.
From the above, when initial signal S is is grounded level, the multiplexer 212A of switching switch 212 first input end
The starting output end 211 of 212A1 electrical connections first and output end 212A4, and the first input signal IN1 is exported by output end 212A4
To the input of the first phase inverter 213；When initial signal S is power level, multiplexer 212A first input end 212A1 electricity
Earth terminal GND is connected, to disconnect the electrical connection of vibration initiator 21 and oscillator 1.In other words, when the initial oscillation of the present invention
Circuit 2 produces two anti-phase the first input signal IN1 and the second input signal IN2 to oscillator 1, oscillator 1 is produced vibration
Afterwards, initial signal S can be exported by logic switch 223 to switch 212 is switched, make the of the multiplexer 212A of switching switch 212
One input 212A1 is electrically connected to earth terminal GND, to avoid the running of interference oscillatory device 1.
In embodiments of the invention, the first input signal level maintainer 222D and the second input signal level maintainer
222E includes impedance and shunt capacitance respectively；First input signal level pull-up switch 222A and the second input signal level pull-up
Switch 222B includes PMOS respectively.
In summary, two anti-phase input signals are provided to oscillator by the vibration starting circuit of the present invention, it can be ensured that
Oscillator produces vibration.Furthermore it can also reduce the time of oscillator foundation vibration by the vibration starting circuit of the present invention.This
Outside, vibration starting circuit also has detection function, for detecting the state of oscillator output signal, to ensure to establish in oscillator
After vibration, the electrical connection of vibration starting circuit and oscillator is disconnected, avoids producing the interference to oscillator.
The preferred embodiments of the present invention are the foregoing is only, are not limited to the claim of the present invention；It is all its
It should be included in the model of following claims without departing from the equivalent change or modification completed under the disclosed spirit of invention
In enclosing.
Claims (14)
1. one kind vibration starting circuit, for oscillator, including：
Oscillator signal detector, the output signal of the oscillator output is received, the level of the output signal is consolidated if detecting
It is fixed, then export the initial signal of enable；
Initiator is vibrated, when the initial signal is enabled, then the first input signal and the second input for producing opposite polarity are believed
Number to the oscillator first input end and the second input；And
First starting output end and the second starting output end, it is electrically connected the first input end and the institute of the oscillator
The second input is stated, and electrically connects the vibration initiator,
Wherein described vibration initiator includes：
First phase inverter, there is input and output end, for making first input signal or second input signal anti-
Phase；And
Switching switch, when the initial signal is enabled, then by the first input end of the oscillator via described first
Starting output end is electrically connected to the input of first phase inverter, and by the output end of first phase inverter via described the
Two starting output ends are electrically connected to second input of the oscillator；When the initial signal disabled, switching switch
Then disconnect the electrical connection of the vibration initiator and the oscillator.
2. vibration starting circuit as claimed in claim 1, wherein the switching switch includes：
Multiplexer, including：
First input end, electrical connection the first starting output end；
Second input, electrically connect earth terminal；
Control terminal, receive the initial signal；And
Output end, the input of first phase inverter is electrically connected, wherein the control terminal is believed according to the starting received
Number, when the initial signal is enabled, the first input end is electrically connected to the output end, it is non-in the initial signal
During enable, second input is electrically connected to the output end；And
Transmission gate, it is electrically connected between output end and the second starting output end of first phase inverter, for being transferred from
First input signal or second input signal of the output end output of first phase inverter.
3. vibration starting circuit as claimed in claim 2, wherein the oscillator signal detector includes：
Input signal actuating switch, electric connection of power supply end and earth terminal receive the output signal of the oscillator output, and according to
The output signal output logic signal；And
Logic switch, the input signal actuating switch is electrically connected, and the initial signal is produced according to the logical signal；
Wherein, the logical signal includes the first logical signal and the second logical signal.
4. vibration starting circuit as claimed in claim 3, wherein the logic switch includes：
NAND gate, it has the first logic signal input end, the second logic signal input end and an output end, and described first
Logic signal input end and second logic signal input end receive first logical signal and second logic respectively
Signal is to produce logic judgment result；And
3rd phase inverter, electrically connects the output end of the NAND gate, and makes the logic judgment result anti-phase to produce
The control terminal that the raw initial signal switchs to the switching.
5. vibration starting circuit as claimed in claim 4, wherein input signal actuating switch includes：
First input signal level pull-up switch, it electrically connects the power end and has input and output end, the input
End receives the output signal of the oscillator output so that the first input signal level pull-up switch is believed according to the output
Number it is turned on and off, to produce first logical signal to first logic signal input end from the output end；
Second phase inverter, there is input and output end, the input electrically connects to be pulled open in the first input signal level
The input of pass, and the output signal of the oscillator output is received, to make the output signal anti-phase；
Second input signal level pull-up switch, it electrically connects the power end and has input and output end, the input
End receives the anti-phase output signal so that the second input signal level pull-up switch is according to the anti-phase institute
State output signal to be turned on and off, inputted with producing second logical signal to second logical signal from the output end
End；
First input signal level maintainer, is electrically connected to first logic signal input end and first input signal is accurate
Between the output end and earth terminal of position pull-up switch, for when the first input signal level pull-up switch is closed, opening
The first input signal level maintainer is opened to produce first logical signal to first logic signal input end；And
Second input signal level maintainer, is electrically connected to second logic signal input end and second input signal is accurate
Between the output end of position pull-up switch and the earth terminal, for being closed when the second input signal level pull-up switch
When, the second input signal level maintainer is opened to produce second logical signal to second logic signal input end.
6. vibration starting circuit as claimed in claim 5, wherein first logical signal and second logical signal are
Power level and/or ground connection level.
7. vibration starting circuit as claimed in claim 5, wherein the first input signal level maintainer and described second
Input signal level maintainer includes impedance and shunt capacitance respectively.
8. vibration starting circuit as claimed in claim 5, wherein the first input signal level pull-up switch and described the
Two input signal level pull-up switch are PMOS.
9. vibration starting circuit as claimed in claim 6, wherein, when the first input signal level pull-up switch and described
The output signal that second input signal level pull-up switch exports according to the oscillator is opened so that first logical signal
And second logical signal, when being the power level, the initial signal is power level.
10. vibration starting circuit as claimed in claim 6, wherein, when the first input signal level pull-up switch and institute
State the output signal that the second input signal level pull-up switch exports according to the oscillator to close so that the first logic letter
Number and second logical signal for it is described ground connection level when, the initial signal for ground connection level.
11. vibration starting circuit as claimed in claim 6, wherein,
When the first input signal level pull-up switch and the second input signal level pull-up switch are according to the vibration
The output signal of device output is separately turned on and closed so that first logical signal is that the power level and described second are patrolled
Volume signal for the ground connection level when, the initial signal is ground connection level.
12. vibration starting circuit as claimed in claim 6, wherein, when the first input signal level pull-up switch and institute
State the output signal that the second input signal level pull-up switch exports according to the oscillator to close and open respectively so that described
When first logical signal is the ground connection level and second logical signal is the power level, the initial signal is to connect
Ground level.
13. vibration starting circuit as claimed in claim 9, wherein, when the initial signal is power level, the switching
The first input end of the multiplexer of switch electrically connects the earth terminal.
14. the vibration starting circuit as described in claim 10,11 or 12, wherein, when the initial signal is is grounded level,
First input end electrical connection the first starting output end of the multiplexer of the switching switch, and the multiplexing of the switching switch
The output end of device exports first input signal or second input signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310032129.6A CN103973298B (en) | 2013-01-28 | 2013-01-28 | Vibration starting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310032129.6A CN103973298B (en) | 2013-01-28 | 2013-01-28 | Vibration starting circuit |
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| CN103973298A CN103973298A (en) | 2014-08-06 |
| CN103973298B true CN103973298B (en) | 2017-12-29 |
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| CN111337986A (en) * | 2020-05-18 | 2020-06-26 | 上海索迪龙自动化有限公司 | Sensor device and detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7482888B1 (en) * | 2007-07-12 | 2009-01-27 | Zerog Wireless, Inc. | Fast startup resonant element oscillator |
| CN101772809A (en) * | 2007-08-03 | 2010-07-07 | 飞思卡尔半导体公司 | Method and circuit for preventing high voltage memory disturb |
| CN102710217A (en) * | 2011-03-28 | 2012-10-03 | 联咏科技股份有限公司 | Oscillator and control circuit thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW395092B (en) * | 1998-08-27 | 2000-06-21 | Admtek Incorported | Method for oscillating and start up circuit for oscillator |
| US6515550B2 (en) * | 2001-05-10 | 2003-02-04 | International Business Machines Corporation | Bipolar ring oscillator with enhanced startup and shutdown |
| US20090289674A1 (en) * | 2008-05-26 | 2009-11-26 | Hong-Sing Kao | Phase-locked loop |
| US8120439B2 (en) * | 2009-08-13 | 2012-02-21 | Texas Instruments Incorporated | Fast start-up crystal oscillator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7482888B1 (en) * | 2007-07-12 | 2009-01-27 | Zerog Wireless, Inc. | Fast startup resonant element oscillator |
| CN101772809A (en) * | 2007-08-03 | 2010-07-07 | 飞思卡尔半导体公司 | Method and circuit for preventing high voltage memory disturb |
| CN102710217A (en) * | 2011-03-28 | 2012-10-03 | 联咏科技股份有限公司 | Oscillator and control circuit thereof |
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