KR940025162A - Synchronous rectification circuit - Google Patents

Abstract

A rectifying circuit for eliminating current noise generated during a switching operation of a transistor is disclosed. The present invention provides voltage conversion means for outputting first and second terminals respectively connected to a voltage source having a predetermined level and converting into a first alternating signal having a desired level and a second alternating signal having a phase opposite to that of the first alternating signal; And an output terminal for indicating an output signal of a desired level, and a switching control terminal connected to the second terminal, and connected between the first terminal and the output terminal, the first terminal and the output corresponding to the second alternating signal. A first switching means for switching the terminals and outputting the AC signals output from the voltage change means to the third terminal, and a switching control terminal connected to the first terminal, and connected between the second terminal and the output terminal. And second switching means for switching the second terminal and the output terminal in response to the first alternating signal to output AC signals output from the voltage converting means to the output terminal. At least one switching means of the first and second switching means is a switching means for removing a noise component. According to the present invention, the current noise indicating the spike component generated during the switching operation of the NOS FET can be removed, and the current noise can be eliminated to reduce the electromagnetic interference (EMI) of the circuit, and also to remove the current noise. This can reduce the switching losses of the circuit.

Description

Synchronous rectification circuit

Since this is an open matter, no full text was included.

3 is a synchronous rectification circuit diagram according to an embodiment of the present invention, Figure 4 is a signal waveform diagram of FIG.

Claims (5)

Voltage conversion means for outputting to the first and second stages respectively connected to a voltage source of a predetermined level and converting into a first alternating signal having a desired level and a second alternating signal in phase opposite to the first alternating signal; An output terminal for indicating a level output signal and a switching control terminal connected to the second terminal, and connected between the first terminal and the output terminal, the first terminal corresponding to the second alternating signal; A first switching means for switching the output terminal to output AC signals output from the voltage converting means to the third terminal, and a switching control terminal connected to the first terminal, wherein the second terminal and the An AC signal connected between the output terminals and switched from the voltage converting means by switching between the second terminal and the output terminal in response to the first alternating signal; And a second switching means for outputting them to the output terminal, wherein at least one switching means of the first and second switching means is a switching means for removing noise components. The rectifier circuit according to claim 1, further comprising a parallel circuit connected in parallel between the first terminal and the third terminal as compared with the first switching means. The inductor of claim 1, wherein the switching means is connected to a transistor operated in response to an AC signal received through a switching control terminal, and is connected between the first and second terminals and the transistor to remove noise components of an output signal. Rectification circuit, characterized in that consisting of. The inductor of claim 2, wherein the switching means is connected to a transistor operated in response to an AC signal received through a switching control terminal, and is connected between the first and second terminals to remove the noise component of the output signal. Rectification circuit, characterized in that consisting of. The rectifier circuit according to claim 3 or 4, wherein the transistor is a field effect transistor. ※ Note: The disclosure is based on the initial application.