Cross multi-channel parallel output full-wave rectifying circuit capable of eliminating a threshold voltage

Abstract

The invention discloses a cross multi-channel parallel output full-wave rectifying circuit capable of eliminating a threshold voltage. A plurality of MOS transistors (M5-8) are added on the basis of agate cross coupling input circuit and MOS switch output circuits to perform threshold compensation on a third MOS transistor M3 and a fourth MOS transistor M4, so that the MOS switch output circuitscan be normally turned on without threshold loss, and the power consumption of the full-wave rectifying circuit of a chip is reduced. The MOS switch output circuits are connected in parallel to supplypower to an analog front end and a digital module, so that mutual influence among modules is avoided. A proper resistor is added to the gate cross coupling input circuit to perform voltage division on a full-wave rectifying current so as to achieve a certain buffer effect.

Description

technical field [0001] The invention relates to the technical field of full-wave rectification, in particular to a full-wave rectification circuit with multiple parallel outputs for eliminating threshold voltage crossings. Background technique [0002] The rectifier circuit is a circuit that uses the unidirectional conductivity of semiconductor diodes to convert alternating current into unidirectional pulsating direct current. Full-wave rectification is a circuit that rectifies AC. In this rectification circuit, current flows through one rectification device (such as a crystal diode) during half a cycle, and current flows through a second rectification device during the other half cycle, and the connection of the two rectification devices enables The current flowing through them flows through the load in the same direction. [0003] The difference between the waveforms before and after full-wave rectification and half-wave rectification is that the two half-waves of AC are...

AI Technical Summary

Problems solved by technology

[0010] 1) Although there are two MOS tubes in the gate cross-connected rectifier circuit, which are similar to switches, there are still two MOS tubes whose threshold voltage drop has not been eliminated, and the power consumption brought to the entire full-wave rectifier circuit is also relatively obvious

[0011] 2) After full-wave rectification, supply power to the following circuit modules, without considering the separate power supply of the modules

This may have a certain influence between each module

[0012] 3) The high-frequency AC signal at the input terminal of the on-chip antenna directly transmits the full-wave rectification circuit, which may affect the full-wave rectification circuit and even burn out the MOS tube

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