Microampere-scale charging and discharging control circuit for low-power-consumption circuit and low-power-consumption circuit

A charge-discharge control and low power consumption technology, applied in circuit devices, battery circuit devices, collectors, etc., can solve the problem of high cost

Active Publication Date: 2012-07-18
BEIJING CREATIVE DISTRIBUTION AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can theoretically be implemented using existing nanoampere-level low-power comparators, the cost is high and it is only of theoretical significance

Method used

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  • Microampere-scale charging and discharging control circuit for low-power-consumption circuit and low-power-consumption circuit
  • Microampere-scale charging and discharging control circuit for low-power-consumption circuit and low-power-consumption circuit

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0013] Such as figure 1 As shown, a microamp level charge and discharge control circuit for low power consumption circuits provided by the invention includes a voltage doubler rectifier circuit a, and the voltage doubler rectifier circuit a receives the current input by the power acquisition mechanism in the low power consumption circuit , further comprising a power supply circuit b and a signal processing circuit c;

[0014] The power supply circuit b includes a first power supply branch b1, a second power supply branch b2, and a third power supply branch b3. A battery BT1 and a third diode VD3 are connected in series in the first power supply branch b1, a fourth diode VD4 is connected in series in the second power supply branch b2, and the third power supply branch b3 includes a field The effect transistor VT1, the fifth diode VD5 and the energy storage capacitor ...

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Abstract

The invention relates to a microampere-scale charging and discharging control circuit for a low-power-consumption circuit and the low-power-consumption circuit. The charging control part of a charging and discharging capacitor C4 of the microampere-scale charging and discharging control circuit consists of a low dropout linear regulator (LDO) and a field-effect tube (VT1). The grid of the VT1 is connected with the output end of the LDO and the source of the VT1 is connected with the input end of the LDO. In the scheme, the on and off of the VT1 is controlled through difference between input voltage and output voltage of the LDO. When the input energy of a fourth diode (VD4) is not enough to meet main power consumption of a system, the difference between the input voltage and the output voltage of the LDO is not enough to turn on the VT1. When the output energy of the VD4 is enough to drive a main system load, the difference between the input voltage and the output voltage of the LDO is enough to turn on the VT1. At the moment, excessive energy acquired from environmental energy is saved in the energy storage capacitor C4, so as to store excessive electric energy at the same time when power is supplied.

Description

technical field [0001] The invention relates to a charging and discharging control circuit used in low power consumption circuits, in particular to a microamp level charging and discharging control circuit used in low power consumption circuits reaching the microampere level. At the same time, the present invention also relates to a low power consumption circuit provided with the microamp level charging and discharging control circuit. Background technique [0002] Low-power circuit systems currently used in the industry are generally powered by batteries. Since the battery life is limited, it is necessary to collect external environmental energy to compensate the battery, so as to improve the battery life. [0003] Ambient energy usually includes solar energy, vibration energy, electromagnetic energy and so on. After the ambient energy is collected into the circuit system, there are two uses, one is used for the work of the micro-power main system; the other is used for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/32H02J7/02
Inventor 袁月春董良
Owner BEIJING CREATIVE DISTRIBUTION AUTOMATION
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