CN100582806C - Low power consumption electric source monitoring circuit - Google Patents
Low power consumption electric source monitoring circuit Download PDFInfo
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- CN100582806C CN100582806C CN 200610144043 CN200610144043A CN100582806C CN 100582806 C CN100582806 C CN 100582806C CN 200610144043 CN200610144043 CN 200610144043 CN 200610144043 A CN200610144043 A CN 200610144043A CN 100582806 C CN100582806 C CN 100582806C
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Abstract
The invention relates to a method for reducing power consumption of a power sensing circuit in an integrated circuit and a circuit structure thereof, wherein the circuit structure comprises a dual-threshold voltage detection module which can be turned off and a stating control circuit of the dual-threshold voltage detection module. The dual-threshold voltage detection module comprises a turn-off upper electric detection circuit and lower electric detection circuit. The stating control circuit produces two control signals to respectively control the turning-on and turning-off of the upper electric detection circuit and the lower electric detection circuit of the dual-threshold voltage detection module. By effectively control the turning-on and turning-off of the stating control circuit, the power consumption of the voltage detection circuit can be reduced effectively, thereby realizing power monitor. The circuit structure of the invention is simple, stable in operation and obvious in power consumption reduction effect.
Description
Technical field:
The present invention is a kind of dual threshold supply voltage monitoring circuit that turn-offs, and is mainly used in power supply monitoring aspect in the low power consumption integrated circuit.
Background technology:
Along with developing rapidly of integrated circuit, the function of chip becomes increasingly complex, scale is increasing, speed is more and more faster, system is also more and more higher to the requirement of power supply, can operate as normal in order to make system, with regard to requiring chip accurate judgement is made in the variation of power supply, also want simultaneously and can carry out filtering, make circuit insensitive the fluctuation of power supply in the certain limit to power supply.On the other hand, along with the widespread use of portable set, battery becomes the power supply that is widely adopted, but the power supply capacity of battery is limited, so the low power dissipation design of chip becomes the main target of design.In order to make chip satisfy above-mentioned needs, designed a kind of dual threshold electric source monitoring circuit that turn-offs, the power-supply fluctuation of its energy filtering certain limit, and the power consumption of itself is very low.This power supply supervisory circuit can be applied in the system of various low-power consumption, and in the time-sharing electricity meter chip of reality, it is all showing excellence aspect anti-power-supply fluctuation and the low-power consumption.
Summary of the invention:
Anti-interference when improving the chip operate as normal and the power consumption when reducing outage have proposed a kind of dual threshold electric source monitoring circuit and control circuit of low-power consumption, and as Fig. 1, this circuit has following characteristics:
Electric source monitoring circuit of the present invention comprises the voltage detecting circuit and the control circuit that can turn-off, as Fig. 2.
Voltage detecting circuit comprises reference voltage source circuit, supply voltage sample circuit and voltage comparator circuit.Voltage detecting circuit monitoring two-way power supply: supply voltage and cell voltage; Three tunnel outputs are arranged, be respectively power on signal LV1, power-off signal LV2, battery under-voltage signal LV3.Electric source monitoring circuit has three Enable Pins, controls three-way output signal respectively.
The reference voltage source circuit adopts all insensitive band gap source circuit of temperature, supply voltage, temperature conditions, the reference voltage source circuit is synthesized an enable signal with three enable signals of observation circuit through Sheffer stroke gate, Enable Pin as voltage source circuit, as long as three Enable Pins have one effectively, promptly open the reference voltage source circuit.
The power supply sample circuit adopts the mode of big resistance polyphone dividing potential drop, and it comprises two parts: the one, and the power supply sample circuit, the power supply power supply is respectively piezoelectric voltage and power down voltage by dividing potential drop output two-way magnitude of voltage; The 2nd, the battery sampling circuit, powered battery is exported one road signal, is cell voltage.The two-way sample circuit all has Enable Pin, and enable signal is received the N tube grid, the resistance of N pipe source electrode, drain electrode difference ground connection and polyphone.
Voltage comparator circuit compares reference voltage and sampled voltage, and it adopts the high-gain amplifier of a difference input and a single-ended output, adds the circuit form of output buffer, makes simulating signal be converted into digital signal.Voltage comparator also comprises Enable Pin.
Control circuit is a digital circuit, is made up of configuration register and a state machine.Configuration register is used for store configuration information, and configuration information comprises the cycle and the dutycycle of the enable signal of opening voltage detecting circuit, and state machine produces corresponding waveform according to configuration information.
Electric source monitoring circuit of the present invention is simple in structure, working stability is reliable, and it is obvious to reduce the power consumption effect.
Description of drawings:
Fig. 1 low-power dissipation power supply testing circuit block diagram
Fig. 2 voltage detecting circuit structure
Fig. 3 voltage sampling circuit
The configurable enable signal waveform of Fig. 4 dutycycle
Specific implementation:
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
As shown in Figure 2, a kind of low-power consumption dual threshold electric source monitoring circuit of the present invention comprises digital control circuit and the voltage detecting circuit that can turn-off.
This voltage detecting circuit has three digital input ends, an analog input end and three digital output ends, and digital input end is three enable signals, and analog input end is the cell voltage input signal.Output terminal is exported three way word signals.The power supply of this circuit is the input power supply of system.This circuit has three ingredients: reference voltage source circuit, voltage sampling circuit, voltage comparator.The reference voltage source circuit will be worked as long as three one of enable signals are effective, otherwise circuit turn-offs the cut-out DC channel.Sample circuit is made up of two parts, and as shown in Figure 3, resistor voltage divider circuit can turn-off by Enable Pin.Voltage comparator one has 3, compares 3 voltages respectively, the corresponding Enable Pin of each voltage comparator.
In order to reduce power consumption, system power on and the enable signal of detection of power loss adopts the ping-pong operation mode, promptly have only one the tunnel effective all the time, when system's operate as normal, the sense enable signal that powers on is invalid, the detection of power loss enable signal is effective, and the battery detecting enable signal is invalid, at this moment has only sample circuit work of a comparer.During the system power down, powered battery, the sense enable signal that at this moment powers on is effective, and the detection of power loss enable signal is invalid, and the battery detecting enable signal is effective.The frequent switching state of chip when preventing power-supply fluctuation, in voltage detecting circuit, the method that has adopted dual threshold to detect, specific practice is, the sampled voltage Voh that powers on is 4.7V, and the sampled voltage Vol of power down is 4.4V, has only power supply to reach more than the 4.7V like this, chip thinks that just power supply is normal, enter power-up state, and power supply only reaches below the 4.4V, chip is just thought power down, the benefit of doing like this is a power supply when fluctuating between 4.7V-4.4V, and the chip steady job is at a kind of state.
Digital control circuit comprises configuration register and state machine, and configuration register is used for store configuration information, comprises the cycle and the dutycycle of enable signal.State machine is used for producing corresponding waveform signal, as Fig. 4.In side circuit, can carry out reasonable configuration to the power-on and power-off reaction time to register according to power consumption and chip.The dutycycle of enable signal is more little, and power consumption is low more, but the reaction of chip power-on and power-off is slack-off.In actual chips, when having only powered battery, chip power-consumption requires high, and is low to the chip power-consumption requirement when power supply is powered, so have only the method that the enable signal of going up power detection circuit just adopts dutycycle of opening.
When real work, behind the chip power, enable signal begins to low, after the end that resets, the high level sense enable signal is opened, and voltage detecting circuit work is in case the sample circuit dividing potential drop surpasses Voh, and EN1 is high, and circuit LV1 exports high, and circuit enters normal operating conditions.EN1 is low afterwards, and EN2 is high, and voltage detecting circuit begins to detect power down voltage, in case voltage drops to Vol, LV2 output is low, and chip enters the power failure mode of operation, powered battery, and circuit works on.
Claims (5)
1, a kind of low power consumption electric source monitoring circuit is used for monitoring power voltage, it is characterized in that comprising:
(1) dual threshold voltage detecting circuit, under the effective condition of its enabling signal monitoring system power on, power-down state, under the invalid condition of its enabling signal, stop to detect and enter low-power consumption mode;
(2) start-up control unit, high and low the rationing the power supply of control dual threshold voltage detecting circuit pressed the unlatching and the shutoff of testing circuit;
(3) the start-up control unit controls is high and low rations the power supply that to press the mode of testing circuit be ping-pong, and power-up state starts the lower bound voltage detecting circuit, and power-down state starts the high pressure testing circuit of rationing the power supply.
2, electric source monitoring circuit as claimed in claim 1 is characterized in that above-mentioned dual threshold voltage detecting circuit, has high limit, the detection of lower bound dual threshold.
3, electric source monitoring circuit as claimed in claim 1 or 2 is characterized in that the above-mentioned high and low pressure testing circuit of rationing the power supply all can open and shut off.
4, electric source monitoring circuit as claimed in claim 1 or 2 is characterized in that its start-up control unit controls height rations the power supply the mode that press to detect for regularly following procuratorial organ's formula.
5, electric source monitoring circuit as claimed in claim 1 or 2, it is characterized in that rationing the power supply its start-up control unit controls height, press to detect the time interval of regularly following inspection be configurable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610144043 CN100582806C (en) | 2006-11-24 | 2006-11-24 | Low power consumption electric source monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610144043 CN100582806C (en) | 2006-11-24 | 2006-11-24 | Low power consumption electric source monitoring circuit |
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| CN101191823A CN101191823A (en) | 2008-06-04 |
| CN100582806C true CN100582806C (en) | 2010-01-20 |
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| CN 200610144043 Expired - Fee Related CN100582806C (en) | 2006-11-24 | 2006-11-24 | Low power consumption electric source monitoring circuit |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104181471B (en) * | 2013-05-28 | 2016-12-28 | 阳光电源股份有限公司 | A kind of inverter power consumption monitoring method and apparatus |
| CN104698393A (en) * | 2013-12-05 | 2015-06-10 | 惠州市德赛西威汽车电子有限公司 | Power detector with automatic muting function and vehicle-borne audio-visual system |
| CN104267240A (en) * | 2014-10-16 | 2015-01-07 | 黄辉 | Low-power-consumption vibration detection lithium battery pack voltage detecting method and device |
| CN105259407B (en) * | 2015-11-04 | 2019-04-30 | 武汉精测电子集团股份有限公司 | It can be to the device and method that Multi-path electricity stream is sampled and is detected |
| CN109417286B (en) * | 2017-06-28 | 2020-04-17 | 深圳配天智能技术研究院有限公司 | Detection circuit of servo driver and servo driver |
| CN107526874A (en) * | 2017-07-28 | 2017-12-29 | 广州星海集成电路基地有限公司 | A kind of low power consumption integrated circuit design method based on dual threashold threshold voltage |
| TWI688187B (en) * | 2019-01-10 | 2020-03-11 | 新唐科技股份有限公司 | Voltage monitoring system and method thereof |
| CN110231508A (en) * | 2019-07-09 | 2019-09-13 | 和记奥普泰通信技术有限公司 | Packetizing OTN, PTN, IPRAN, SPN and PON device looses power alarm detection method |
| CN110596614B (en) * | 2019-07-17 | 2022-03-08 | 陕西千山航空电子有限责任公司 | BIT method for protecting independent power supply module in recorder |
| JP7457942B2 (en) * | 2020-03-24 | 2024-03-29 | パナソニックＩｐマネジメント株式会社 | Video Output System |
| CN111751780A (en) * | 2020-07-07 | 2020-10-09 | 广东电网有限责任公司计量中心 | Device and method for monitoring undervoltage of battery of electric energy meter |
| CN112115520A (en) * | 2020-09-18 | 2020-12-22 | 天津兆讯电子技术有限公司 | Internal power supply structure and method, safety chip and electronic card |
| CN112069554A (en) * | 2020-09-18 | 2020-12-11 | 天津兆讯电子技术有限公司 | Power-on structure of external power supply, method thereof, security chip and electronic card |
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2006
- 2006-11-24 CN CN 200610144043 patent/CN100582806C/en not_active Expired - Fee Related
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| CN101191823A (en) | 2008-06-04 |
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Address after: 102209 Beijing, Beiqijia, the future of science and technology in the south area of China electronic network security and information technology industry base C building, Patentee after: Beijing CEC Huada Electronic Design Co., Ltd. Address before: 100015 Beijing city Chaoyang District District No. 1 Gaojiayuan Patentee before: Beijing CEC Huada Electronic Design Co., Ltd. |
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