CN103678213A - Universal serial bus hub and control method thereof - Google Patents
Universal serial bus hub and control method thereof Download PDFInfo
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- CN103678213A CN103678213A CN201310593604.7A CN201310593604A CN103678213A CN 103678213 A CN103678213 A CN 103678213A CN 201310593604 A CN201310593604 A CN 201310593604A CN 103678213 A CN103678213 A CN 103678213A
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Abstract
The present invention provides a universal serial bus hub and a control method thereof. By means of respectively supplying different voltages to a circuit set when the universal serial bus hub is in a dormancy state and a normal operation state, leakage current is reduced. The universal serial bus hub comprises the components of: a control unit which determines whether the universal serial bus hub enters the dormancy state through detecting the signal of a universal serial bus; a core circuit set which is coupled with the control unit; and a voltage transforming unit which is arranged in the universal serial bus hub and is coupled with the control unit and the core circuit set and is controlled by the control unit for generating a normal operating voltage when the universal serial bus hub operates in a normal operation state and generating a first dormancy voltage when the universal serial bus hub is in the dormancy state, and furthermore the core circuit set receives the first dormancy voltage in the dormancy state, wherein the first dormancy voltage is lower than the normal operating voltage.
Description
Technical field
The present invention relates to a kind of electronic installation, particularly relate to a kind of universal serial bus concentrator and control method thereof.
Background technology
At present, the modal hot-plug interface of computing machine is on the market just USB (universal serial bus) (Universal Serial Bus, USB) interface.Current most USB (universal serial bus) external connecting device is to be connected to computing machine with USB2.0 interface.Along with science and technology progresses greatly day by day, the signal transmission specification of USB (universal serial bus) is also developed to USB3.0 from USB2.0.Transfer rate compared to traditional USB2.0 only has 480M bps, and the transfer rate of USB3.0 can reach 5G bps, has significantly increased the speed that data are transmitted.
The standard of relevant USB (universal serial bus) does not clearly define current limit.Generally speaking, the core voltage that USB2.0 hub provides is 3.3V, and the core voltage that USB3.0 hub provides under dormant state and normal operation state is 1～1.5V.Because the universal serial bus concentrator of prior art provides fixing core voltage in dormancy and normal operation state, therefore may under dormant state, produce leakage current and cause unnecessary power consumption.
Summary of the invention
The invention provides a kind of control device and method of operating thereof, can reduce the power consumption of universal serial bus concentrator.
Universal serial bus concentrator of the present invention, it is coupled to a main frame or another universal serial bus concentrator via a USB (universal serial bus), and universal serial bus concentrator comprises control module, core circuit group and voltage conversion unit.Wherein control module judges by surveying the signal of this USB (universal serial bus) whether universal serial bus concentrator enters dormant state.Core circuit group couples control module.Voltage conversion unit, couple control module and core circuit group, be controlled by control module and in universal serial bus concentrator, produce normal working voltage during in normal operating conditions, and in universal serial bus concentrator, produce the first dormancy voltage during in dormant state, core circuit group receives the first dormancy voltage under dormant state, and wherein the first dormancy voltage is lower than normal working voltage.
The control method of universal serial bus concentrator of the present invention, universal serial bus concentrator is coupled to main frame or another universal serial bus concentrator via USB (universal serial bus), and the control method of universal serial bus concentrator comprises the following steps.By surveying the signal of USB (universal serial bus), judge whether universal serial bus concentrator enters dormant state.In universal serial bus concentrator, during in normal operating conditions, control voltage conversion unit and produce normal working voltage.In universal serial bus concentrator, during in dormant state, control voltage conversion unit and produce the first dormancy voltage, wherein core circuit group receives the first dormancy voltage under dormant state.Wherein the first dormancy voltage, lower than normal working voltage, is built in universal serial bus concentrator in voltage conversion unit.
Based on above-mentioned, the present invention is by you can well imagine for different voltage to circuit group in dormancy and normal operating conditions time-division at universal serial bus concentrator, to reduce the generation of leakage current, and then reduces the power consumption of universal serial bus concentrator.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and be described with reference to the accompanying drawings as follows.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the universal serial bus concentrator of one embodiment of the invention.
Fig. 2 shows the schematic diagram of the universal serial bus concentrator of another embodiment of the present invention.
Fig. 3 shows the schematic diagram of the voltage stabilizer of one embodiment of the invention.
Fig. 4 shows the control method of the universal serial bus concentrator of one embodiment of the invention.
Reference numeral explanation
10: main frame
101: USB (universal serial bus)
100,200: universal serial bus concentrator
102: control module
104: core circuit group
1041: the first circuit groups
1043: second circuit group
108: voltage conversion unit
110,202,204,300: voltage stabilizer
302: mu balanced circuit
304: partial pressure unit
306: comparer
VO: normal working voltage
VS1: the first dormancy voltage
VS2: the second dormancy voltage
S1: notice signal
S2: wake signal up
VCC: reference voltage
Vsw: sawtooth wave signal
V1: voltage of voltage regulation
V2: dividing potential drop signal
PWM1: pulse-length modulation signal
R1～R3: resistance
SW1: switch
S402～S406: the control method step of universal serial bus concentrator
Embodiment
Fig. 1 shows the schematic diagram of the universal serial bus concentrator of one embodiment of the invention.Please refer to Fig. 1, universal serial bus concentrator 100 comprises control module 102, core circuit group 104 and voltage conversion unit 108.Wherein control module 102 couples core circuit group 104 and voltage conversion unit 108, and voltage conversion unit 108 also couples core circuit group 104.Wherein, the specification of universal serial bus concentrator 100 can be USB2.0 or USB3.0.Wherein, core circuit group 104 is the core circuit of universal serial bus concentrator 100, different from input and output (I/O) circuit (not illustrating), the supply voltage of core circuit is lower than the supply voltage of input and output (I/O) circuit, for example, in the universal serial bus concentrator 100 of USB3.0 specification, in normal operation, the supply voltage of input and output (I/O) circuit is 3.3V, and the supply voltage of core circuit is 1.XV(1.0～1.5V), the supply voltage of core circuit group 104 depends on the manufacturing process of universal serial bus concentrator 100, the manufacturing process of 80nm of take is example, core circuit group 104 supply voltage is in normal operation 1.2V.Control module 102 can be couple to a main frame 10 or another universal serial bus concentrator (not illustrating) by a USB (universal serial bus) 101, and judges by surveying the signal of USB (universal serial bus) 101 whether universal serial bus concentrator 100 enters dormant state.For example, when the specification of universal serial bus concentrator is USB2.0, control module 102 can judge whether universal serial bus concentrator 100 enters dormant state by surveying the specific pattern (pattern) defining in the mechanism of the agreement of shaking hands of transmission in this USB (universal serial bus) 101, when the specification of universal serial bus concentrator 100 is USB3.0, 102 of control modules judge by the prompting signal from main frame 10 or this another universal serial bus concentrator (not illustrating) of surveying in USB (universal serial bus) 101 whether universal serial bus concentrator 100 enters dormant state.
When control module 102 is judged universal serial bus concentrator 100 in normal condition, control module 102 is controlled voltage conversion unit 108 and is produced normal working voltage VO to control module 102 and core circuit group 104, so that control module 102 and the required core voltage of core circuit group 104 running to be provided, normal working voltage VO can be for example 1.2 volts, so not as limit.
And when control module 102 is judged universal serial bus concentrator 100 and must be entered dormant state, control module 102 is controlled voltage conversion units 108 and produced the first dormancy voltage VS1, wherein the first dormancy voltage VS1 is less than normal working voltage VO.Core circuit group 104 receives the first dormancy voltage VS1 under dormant state, wherein core circuit group 104 is included in the first circuit group 1041 that must operate under dormant state in one embodiment, for example signal receiving test circuit (receiving detecting circuit), Remote Wake Up circuit (remote wakeup circuit) and low-frequency cycle signal testing circuit (LFPS detecting circuit) etc.Under dormant state, control module 102 and the first circuit group 1041 still can carry out basic running according to the first dormancy voltage VS1, the first dormancy voltage VS1 can be for example 1.0 volts, so, not as limit, the first dormancy voltage VS1 is more than or equal to the minimum operation voltage of the first circuit group 1041.In one embodiment, the first dormancy voltage VS1 can be the minimum operation voltage that can maintain the basic running of control module 102 and the first circuit group 1041, and it determines by manufacturing process, and under different fabrication process condition, the first dormancy voltage VS1 is different.Core circuit group 104 is also included in the second circuit group 1043 that must not operate under dormant state, for example, for the treatment of the circuit of data transmission, such as the physical layer circuit (ePHY circuit) of data transmit-receive module (TRX module).Under dormant state, the first dormancy voltage VS1 cannot make 1043 normal operations of second circuit group, that is the first dormancy voltage VS1 is lower than the minimum operation voltage of second circuit group 1043.
As mentioned above, by providing dormancy voltage lower than normal working voltage VO to core circuit group 104 under dormant state, can reduce the generation of leakage current, and then lower significantly power consumption.Under dormant state, the circuit of Advanced Manufacturing Technology (<90nm) can produce leakage current, and thereby nationality of the present invention reduces leakage current by the voltage providing under dormant state is provided, and due to power consumption be proportional to voltage square, therefore make the power consumption of universal serial bus concentrator 100 be square number and decline.And simultaneously this dormancy voltage can make universal serial bus concentrator 100 under dormant state must continue running circuit (the first circuit group 1041) maintain basic running, thereby maintain the lower function that must have of dormant state.
For example, when user wakes universal serial bus concentrator 100 up, the first circuit group 1041 can receive and wake signal S2 up, and give notice signal S1 to control module 102 according to waking signal S2 up, so that control module 102 is controlled voltage conversion unit 108 output normal working voltage VO to control module 102, the first circuit group 1042 and second circuit group 1043, so that it enters normal condition, and carried out the complete function that it has, wherein wake signal S2 up and can for example by mouse or keyboard, trigger.
Furthermore, the voltage conversion unit 108 in universal serial bus concentrator 100 as shown in Figure 1 can comprise voltage stabilizer 110 in one embodiment.Wherein voltage stabilizer 110 couples control module 102Yu core circuit group 104.In one embodiment, voltage stabilizer 110 is controlled by control module 102 and via one first output pin of universal serial bus concentrator 100, export above-mentioned normal working voltage VO and the first dormancy voltage VS1 to an external inductors, this external inductors is positioned at outside the sheet of universal serial bus concentrator 200, universal serial bus concentrator 100 also comprises one first input pin, couple core circuit group 104, via this external inductors, receive normal working voltage VO or the first dormancy voltage VS1.
Universal serial bus concentrator 100 that it should be noted that above-described embodiment can for example be implemented on a chip, and voltage conversion unit 108 is configurable in universal serial bus concentrator 100 inside.
Fig. 2 shows the schematic diagram of the universal serial bus concentrator of another embodiment of the present invention.The function of the module that in Fig. 2, label is identical is all identical with running and Fig. 1, does not repeat them here.When control module 102 is judged universal serial bus concentrator 200 in normal condition, control module 102 is controlled voltage conversion unit 108 and is produced normal working voltage VO to control module 102, the first circuit group 1041 and second circuit group 1043, with provide control module 102, the first circuit group 1041 and 1043 runnings of second circuit group the power supply of palpus, normal working voltage VO can be for example 1.2 volts, so not as limit.Different from Fig. 1 is, when control module 102 is judged universal serial bus concentrator 200 and must be entered dormant state, control module 102 is controlled voltage conversion unit 108 and is produced the first dormancy voltage VS1 and the second dormancy voltage VS2, and wherein the second dormancy voltage VS2 is lower than the first dormancy voltage VS1.The first circuit group 1041 and second circuit group 1043 are respectively at receiving the first dormancy voltage VS1 and the second dormancy voltage VS2 under dormant state, wherein 1041 of the first circuit groups can be included in the circuit that must operate under dormant state, for example signal receiving test circuit, Remote Wake Up circuit and low-frequency cycle signal testing circuit etc.Under dormant state, control module 102 and the first circuit group 1041 still can carry out basic running according to the first dormancy voltage VS1.In addition, second circuit group 1043 can be included in the circuit that must not operate under dormant state, for example, for the treatment of the circuit of data transmission.In the embodiment of Fig. 2, the the second dormancy voltage VS2 that offers second circuit group 1043 under dormant state is further to reduce power consumption than the lower voltage of the first dormancy voltage VS1, the second dormancy voltage VS2 can be for example 0.7 volt, so not as limit, in one embodiment, the second dormancy voltage VS2 can be the minimum voltage value that guarantees that second circuit group 1043 can wake up from dormant state, it is determined by manufacturing process, under different fabrication process condition, the second dormancy voltage VS2 is also different, the second dormancy voltage VS2 also can be lower voltage or 0 volt.
In the embodiment of Fig. 2, by circuit being divided into the first circuit group 1041 and second circuit group 1043, and under dormant state, provide different dormancy voltage to the first circuit group 1041 and second circuit group 1043, the dormancy voltage of the second circuit group 1043 that further reduction need not operate, thereby further reduce the generation of leakage current, and then lower significantly power consumption.In addition, and provide than low the first dormancy voltage VS1 of normal working voltage VO to control module 102 and the first circuit group 1041, can make universal serial bus concentrator 100 maintain the lower function that must have of dormant state.
Furthermore, the voltage conversion unit 108 in universal serial bus concentrator 200 as shown in Figure 2 can comprise voltage stabilizer 202 and voltage stabilizer 204 in one embodiment.Wherein voltage stabilizer 202 couples control module 102 and the first circuit group 1041, and voltage stabilizer 204 couples control module 102Yu second circuit group 1043.In one embodiment, voltage stabilizer 202 is controlled by control module 102 and via one first output pin of universal serial bus concentrator 200, export above-mentioned normal working voltage VO and the first dormancy voltage VS1 to an external inductors, this external inductors is positioned at outside the sheet of universal serial bus concentrator 200, universal serial bus concentrator 200 also comprises one first input pin, couple this first circuit group 1041, via this external inductors, receive normal working voltage VO or the first dormancy voltage VS1.202 of voltage stabilizers are controlled by control module 102 and via one second output pin of universal serial bus concentrator 200, export above-mentioned normal working voltage VO and the second dormancy voltage VS2 to another external inductors, universal serial bus concentrator 200 also comprises one second input pin, couple this second circuit group 1043, via this external inductors, receive normal working voltage VO or the second dormancy voltage VS2.
In other embodiments, voltage conversion unit 108 can only comprise a voltage stabilizer 202, and further comprise a switch unit (not illustrating), this switch unit couples this control module 102Yu Gai second circuit group 1043, be controlled by this control module 102 and in this universal serial bus concentrator 200 during in this normal operating conditions, the normal working voltage VO of voltage stabilizer 202 outputs is offered to this second circuit group 1043, and when this dormant state, the second dormancy voltage VS2 of the one second input pin input via this universal serial bus concentrator 200 is offered to this second circuit group 1043, wherein this second dormancy voltage VS2 is not from a motherboard (illustrating), via this second input pin input.
The quality of the embodiment of Fig. 1 and Fig. 2 is discussed now.Embodiment compared to Fig. 2, Fig. 1 provides identical dormancy voltage VS1 for the first circuit group 1041 and second circuit group 1043, although power consumption is high than the embodiment of Fig. 2, but because voltage conversion unit 108 only needs to export a dormancy voltage, therefore only need to take 200 1 output pins of universal serial bus concentrator and an input pin.And the embodiment of Fig. 2 takies more output and input pin, but leakage current and power consumption further reduces, so the embodiment of Fig. 1 and Fig. 2 can need to select flexibly for design.
Fig. 3 shows the schematic diagram of the voltage stabilizer of one embodiment of the invention.Please refer to Fig. 3, specifically, voltage stabilizer 110, voltage stabilizer 202 can be as shown in Figure 3 with the embodiment of voltage stabilizer 204.Voltage stabilizer 300 comprises mu balanced circuit 302, partial pressure unit 304 and comparer 306.Wherein mu balanced circuit 302 couples the output terminal of reference voltage VCC and comparer 306, and an input end of comparer 306 couples partial pressure unit 304, and another input end receives sawtooth wave signal Vsw, and partial pressure unit 304 also couples the output terminal of mu balanced circuit 302.
Wherein partial pressure unit 304 is carried out dividing potential drop in order to the voltage of voltage regulation V1 (that is above-mentioned normal working voltage VO, the first dormancy voltage VS1 or second dormancy voltage VS2) that mu balanced circuit 302 is exported, to produce dividing potential drop signal V2 to comparer 306.Comparer 306 comparison dividing potential drop signal V2 and sawtooth wave signal Vsw are to produce pulse-length modulation signal PWM1 to mu balanced circuit 302, make mu balanced circuit 302 carry out voltage stabilizing and produce voltage of voltage regulation V1 reference voltage VCC according to pulse-length modulation signal PWM1, wherein mu balanced circuit 302 can be for example reduction voltage circuit, booster circuit or buck/boost circuit.
Specifically, partial pressure unit 304 can for example comprise resistance R 1～R3 and interrupteur SW 1, and wherein resistance R 1, R2 are series between the output terminal and ground connection of mu balanced circuit 302, and interrupteur SW 1 and resistance R 3 are series between the common joint and ground connection of resistance R 1, R2.The conducting state of interrupteur SW 1 is controlled by control module 102, by the conducting state of gauge tap SW1, can control mu balanced circuit 302 output normal working voltage or dormancy voltages.
Fig. 4 shows the control method of the universal serial bus concentrator of one embodiment of the invention.Universal serial bus concentrator is coupled to main frame or another universal serial bus concentrator via USB (universal serial bus).The control method of concluding above-mentioned universal serial bus concentrator can comprise the following steps.First, by surveying the signal of USB (universal serial bus), judge whether universal serial bus concentrator enters dormant state (step S402).If universal serial bus concentrator is in normal operating conditions, control voltage conversion unit and produce normal working voltage (step S404), on the contrary, if universal serial bus concentrator enters dormant state, control voltage conversion unit and produce the first dormancy voltage, wherein core circuit group receives the first dormancy voltage (step S406) under dormant state.Wherein the first dormancy voltage is lower than normal working voltage, and the first dormancy voltage is lower than the minimum operation voltage of second circuit group.
In sum, the present invention is by provide during in dormant state different voltage to different circuit groups at universal serial bus concentrator, to reduce the generation of leakage current, so not only can reduce the power consumption of universal serial bus concentrator, and can not increase extra manufacturing cost.
Claims (13)
1. a universal serial bus concentrator, it is coupled to a main frame or another universal serial bus concentrator via a USB (universal serial bus), and this universal serial bus concentrator comprises:
One control module, judges by surveying the signal of this USB (universal serial bus) whether this universal serial bus concentrator enters a dormant state;
One core circuit group, couples this control module; And
One voltage conversion unit, inside be built in this universal serial bus concentrator, it couples this control module and this core circuit group, be controlled by this control module and in this universal serial bus concentrator, produce a normal working voltage during in a normal operating conditions, and in this universal serial bus concentrator, produce one first dormancy voltage during in this dormant state, this core circuit group receives this first dormancy voltage under this dormant state, and wherein this first dormancy voltage is lower than this normal working voltage.
2. universal serial bus concentrator as claimed in claim 1, wherein Dang Gai core circuit group receives one while waking signal up under this dormant state, and this wakes this core circuit group by signal up and notify this control module to control this voltage conversion unit to export this normal working voltage Zhi Gai core circuit group.
3. universal serial bus concentrator as claimed in claim 2, wherein this wakes signal up by being triggered by a mouse or a keyboard.
4. universal serial bus concentrator as claimed in claim 1, wherein this universal serial bus concentrator further comprises:
One first voltage stabilizer, couples this control module Yu Gai core circuit group, is controlled by this control module and exports this normal working voltage or this first dormancy voltage;
One first output pin, couples this first voltage stabilizer, by this normal working voltage or this first dormancy Voltage-output to external inductors; And
One first input pin, couples this core circuit group, via this external inductors, receives this normal working voltage or this first dormancy voltage.
5. universal serial bus concentrator as claimed in claim 4, wherein this first voltage stabilizer comprises:
One mu balanced circuit, couples a reference voltage, according to a pulse-length modulation signal, this reference voltage is carried out to voltage stabilizing to export this normal working voltage or this first dormancy voltage;
One partial pressure unit, couples the output terminal of this mu balanced circuit, is controlled by the output voltage of this this mu balanced circuit of control module dividing potential drop, and produces a dividing potential drop signal; And
One comparer, its input end couples this partial pressure unit, and the output terminal of this comparer couples the input end of this mu balanced circuit, and this comparer is this dividing potential drop signal and a sawtooth wave signal and produce this pulse-length modulation signal to this mu balanced circuit relatively.
6. universal serial bus concentrator as claimed in claim 5, wherein this partial pressure unit comprises:
One first resistance, its first end and the second end are coupled to respectively output terminal and a common joint of this mu balanced circuit;
One second resistance, its first end and the second end are coupled to respectively this common joint and a reference voltage;
One the 3rd resistance; And
One switch, and the 3rd resistance is serially connected with between this common joint and this reference voltage, and wherein the conducting state of this switch is controlled by this control module so that this mu balanced circuit is exported this normal working voltage or this first dormancy voltage.
7. universal serial bus concentrator as claimed in claim 1, wherein, when the specification of this universal serial bus concentrator is USB2.0, this control module judges by surveying the specific pattern defining in the mechanism of the agreement of shaking hands of transmitting in this USB (universal serial bus) whether this universal serial bus concentrator enters this dormant state; And
Wherein, when the specification of this universal serial bus concentrator is USB3.0, this control module judges by the prompting signal from this main frame or this another universal serial bus concentrator of surveying in this USB (universal serial bus) whether this universal serial bus concentrator enters this dormant state.
8. universal serial bus concentrator as claimed in claim 1, this core circuit group also comprises one first Ji Yi of circuit group second circuit group, wherein this first circuit group is included in the core circuit that must operate under this dormant state, this second circuit group is included in the core circuit that must not operate under this dormant state, and wherein this first dormancy voltage is lower than a minimum operation voltage of this second circuit group.
9. universal serial bus concentrator as claimed in claim 8, wherein this voltage conversion unit is controlled by this control module and also in this universal serial bus concentrator, produces one second dormancy voltage during in this dormant state, this second circuit group receives this second dormancy voltage under this dormant state, this the first circuit group receives this first dormancy voltage under this dormant state, and wherein this second dormancy voltage is lower than this first dormancy voltage.
10. universal serial bus concentrator as claimed in claim 8, wherein this universal serial bus concentrator further comprises:
One second voltage stabilizer, couples this control module Yu Gai second circuit group, is controlled by this control module and exports this normal working voltage or one second dormancy voltage;
One second output pin, couples this second voltage stabilizer, by this normal working voltage or this second dormancy Voltage-output to external inductors; And
One second input pin, receives this normal working voltage or this second dormancy voltage via this external inductors.
11. universal serial bus concentrators as claimed in claim 8, wherein this universal serial bus concentrator further comprises:
One second input pin, receives the one second dormancy voltage from a motherboard; And
One switch unit, it couples this control module Yu Gai second circuit group, be controlled by this control module and in this universal serial bus concentrator during in this normal operating conditions, this normal working voltage is offered to this second circuit group, and this second dormancy voltage is offered to this second circuit group in this universal serial bus concentrator during in this dormant state.
The control method of 12. 1 kinds of universal serial bus concentrators, this universal serial bus concentrator is coupled to a main frame or another universal serial bus concentrator via a USB (universal serial bus), and this control method comprises:
By surveying the signal of this USB (universal serial bus), judge whether this universal serial bus concentrator enters a dormant state;
In this universal serial bus concentrator, during in a normal operating conditions, control a voltage conversion unit and produce a normal working voltage; And
In this universal serial bus concentrator, during in this dormant state, control this voltage conversion unit and produce one first dormancy voltage, wherein a core circuit group receives this first dormancy voltage under this dormant state;
Wherein this first dormancy voltage, lower than this normal working voltage, is wherein built in this universal serial bus concentrator in this voltage conversion unit.
The control method of 13. universal serial bus concentrators as claimed in claim 12, wherein this core circuit group also comprises one first Ji Yi of circuit group second circuit group, this the first circuit group is included in the core circuit that must operate under this dormant state, this second circuit group is included in the core circuit that must not operate under this dormant state, and wherein this first dormancy voltage is lower than a minimum operation voltage of this second circuit group.
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| Application Number | Priority Date | Filing Date | Title |
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| US201361806244P | 2013-03-28 | 2013-03-28 | |
| US61/806,244 | 2013-03-28 | ||
| US201361862896P | 2013-08-06 | 2013-08-06 | |
| US61/862,896 | 2013-08-06 |
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| CN109407577A (en) * | 2018-09-30 | 2019-03-01 | 珠海格力电器股份有限公司 | A kind of wake-up circuit, awakening method and electric cooker |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103678213B (en) | 2017-02-15 |
| TW201437819A (en) | 2014-10-01 |
| TWI613546B (en) | 2018-02-01 |
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