Rectifier

Abstract

The invention discloses a rectifier which at least comprises a single-stage rectification circuit, wherein the single-stage rectification circuit comprises a first flying capacitor, a second flying capacitor, a first NMOS transistor, a second NMOS transistor, a first PMOS transistor, a second PMOS transistor and an output capacitor, wherein a substrate and a source electrode of the first NMOS transistor are electrically connected to a second output end of a pre-stage circuit and are insulated from a first output end of the pre-stage circuit, a substrate and a source electrode of the second NMOS transistor are electrically connected to a first output end of a pre-stage circuit and are insulated from a second output end of the pre-stage circuit, a second end of the first flying capacitor is electrically connected with a positive end of a signal source, and a second end of the second flying capacitor is electrically connected to a negative end of the signal source; a substrate and a source electrode of the first PMOS transistor and a substrate and a source electrode of the second PMOS transistor are electrically connected and serve as an output end of the single-stage rectification circuit. According to the rectifier, minimum input voltage is lowered, and power conversion efficiency of the rectifier is improved when ultra-low voltage is input.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a rectifier. Background technique [0002] Rectifiers are widely used in RFID, wireless charging, supply chain management and wireless sensor networks. Among them, the power conversion efficiency (Power Conversion Efficiency, PCE) and the minimum input voltage largely determine the performance of the rectifier. [0003] Traditional single-stage rectifiers such as figure 1 As shown, when the input positive terminal is a positive voltage and the input negative terminal is a negative voltage, the metal oxide semiconductor field effect transistor, that is, the MOS tube, P1 and N2 are turned on, P2 and N1 are turned off, and the Vx point is at a high level , while the Vy point is charged to the ground, and the forward conduction current is output through P1. When the input negative terminal is a positive voltage and the input positive terminal is a negative voltage, P2 and N1 a...

AI Technical Summary

Problems solved by technology

[0005] Since the rectifier of the traditional structure can only be turned on when Vy-Vx is greater than the threshold voltage, the minimum input voltage is very high

At the same time, because the rectifier of the traditional structure is difficult to be biased into the saturation region under low voltage conditions, it greatly limits the working range of radio frequency identification or sensor networks.

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