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Self-turn-off energy collection circuit started at low power and having voltage monitoring function

A voltage monitoring and energy harvesting technology, applied in circuit devices, measuring electrical variables, measuring current/voltage, etc., can solve the problems of slow enough to meet the normal power consumption of the system load chip, abnormal system operation, etc.

Active Publication Date: 2020-05-12
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At the same time, when the existing micro-energy collection management system is working, the system load chip and other chips are often working all the time. When the system collects energy slowly, it is very slow to meet the normal power consumption of the system load chip, which leads to the failure of the system to work. abnormal

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  • Self-turn-off energy collection circuit started at low power and having voltage monitoring function
  • Self-turn-off energy collection circuit started at low power and having voltage monitoring function
  • Self-turn-off energy collection circuit started at low power and having voltage monitoring function

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Embodiment Construction

[0071] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0072] refer to figure 1 , which is the circuit schematic diagram of the first embodiment of the self-shutdown energy harvesting circuit with low power start and voltage monitoring function. The micro-energy collection management system with voltage monitoring function that can be started at 0.7V and 200nA in this embodiment includes: a first energy storage device C1, a first P-type switch tube Q1, a load resistor R1, a first decoupling capacitor C2, The first pull-up resistor R2, the diode D1, the voltage monitoring chip U1, the second P-type switch tube Q2, the N-type switch tube Q3, the input capacitor C3, the DC / DC conversion chip U2, the second energy storage device C4, the third P type MOS transistor Q4, the four...

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Abstract

The invention discloses a self-turn-off energy collection circuit started at low power and having a voltage monitoring function, which reduces the energy collection starting power to 0.14 [mu]W and can significantly improve the sensitivity of energy collection. The self-turn-off energy collection circuit can be used for energy collection in environments with weak illumination, low vibration intensity, small temperature difference and the like, and is particularly suitable for a scene based on radio frequency energy collection; tests show that the minimum radio frequency input power capable ofoperating is-22dBm at 915MHz, and the space range of radio frequency energy collection can be effectively expanded; and meanwhile, a voltage monitoring function is added, so that normal power utilization of the system is ensured.

Description

technical field [0001] The invention relates to the field of micro-energy collection, and more specifically relates to a self-shutdown energy collection circuit with low-power startup and voltage monitoring function. Background technique [0002] Energy harvesting is a key technology to enable long-term maintenance-free operation of low-power circuit systems such as passive IoT. By capturing these energies in the environment, such as lighting, temperature differences, vibrations, and electromagnetic waves (radio frequency energy), low-power electronics can function properly. Among these micropower sources, energy from RF transmitters has unique advantages, including predictable and consistent power over distance, enabling passive IoT away from the constraints of batteries and wired power. [0003] Capturing ambient RF energy is now available from tens of billions of wireless transmitters around the world, and the number is growing, including mobile phones, handheld radios, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/20G01R19/165
CPCH02J50/20G01R19/165
Inventor 张帅唐晓庆佘亚军谢桂辉
Owner NO 719 RES INST CHINA SHIPBUILDING IND