a rectifier

Abstract

The invention discloses a rectifier, which at least includes a single-stage rectification circuit; the single-stage rectification circuit includes a first flying capacitor, a second flying capacitor, a first NMOS transistor, a second NMOS transistor, a first PMOS transistor, and a second PMOS transistor. tube and output capacitor; the substrate and source of the first NMOS tube are electrically connected to the second output terminal of the previous stage circuit, and are insulated from the first output terminal of the previous stage circuit; the substrate and source electrode of the second NMOS tube are electrically connected Connected to the first output terminal of the previous stage circuit, and insulated from the second output terminal of the previous stage circuit; the second terminal of the first flying capacitor is electrically connected to the positive terminal of the signal source, and the second terminal of the second flying capacitor is electrically connected Connect the negative end of the signal source; the substrate and source of the first PMOS transistor, and the substrate and source of the second PMOS transistor are electrically connected and used as the output end of the single-stage rectification circuit. The invention reduces the minimum input voltage and improves the power conversion efficiency of the rectifier when the 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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