Double-period conversion circuit for energy acquisition

Abstract

The invention discloses a double-period conversion circuit for energy acquisition. The double-period conversion circuit comprises two stages, wherein the first stage is a negative pressure converter, the second stage is an active diode, the negative pressure converter is used for converting negative amplitude of an AC signal of a sensor to positive amplitude, a P-channel metal oxide semiconductor (PMOS) adopts a substrate bias design and is used for reducing the conduction resistance, and the active diode adopts a common-gate comparator structure and is used for reducing a power supply voltage of a system on the basis of ensuring the gain and bandwidth. The double-period conversion circuit aims to reduce the number of comparators, reduce the working voltage and the power consumption of the overall circuit and improve the voltage conversion efficiency and the energy conversion efficiency, and the requirements of a micro energy acquisition system for low voltage and low power consumption are met. By reducing the working voltages of the comparators, the overall working voltage is reduced, so that the circuit is applicable to the energy acquisition system; by the adoption of the two-stage rectification structure, the number of the comparators is reduced, the overall power consumption is reduced, and the energy conversion efficiency is improved; and the energy loss in open-circuit time is reduced through double-period control.

Description

technical field [0001] The invention belongs to the technical field of microelectronics, and in particular relates to a double-period conversion circuit for energy acquisition. Background technique [0002] In recent years, with the rapid development of wireless technology and sensing technology, the size of microelectronic systems is getting smaller and smaller, and the power consumption is getting lower and lower. With the increasing complexity of the application environment of microelectronic devices and the diversification of application fields, people put forward higher requirements on the performance of all aspects of the device, especially the sustainability of the system. Due to the shortcomings of short life, limited energy storage and serious chemical toxicity, traditional batteries are limited in the application of microelectronic systems. In some environments that humans cannot reach and cannot touch, it is almost difficult to replace traditional chemical batteri...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-cycle conversion circuit for energy acquisition, which aims to solve the problem that existing active rectifiers need more comparators, and the comparators have high operating voltage and large power consumption, and cannot realize self-power supply , cannot meet the low-voltage and low-power requirements of the energy harvesting system, and the energy waste of the output sensor during the switch-off period of the switch control method seriously affects the energy conversion efficiency of the rectifier.

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