Miniaturized low-conduction delay digital signal isolation transmission system

Abstract

The invention discloses a miniaturized low-conduction delay digital signal isolation transmission system. The system comprises a signal generation module for sending out an initial signal, a buffer module being connected with the signal generation module and being used for impedance matching, a differential module beings connected with the buffer module and being used for converting the initial signal into a modulation signal, a transformer module being connected with the differential module and being used for carrying out isolated transmission on the modulation signal, a trigger module beingconnected with the transformer module and being used for demodulating the modulation signal to obtain a final signal, a pre-triggering module being respectively connected with the transformer module and the trigger module and being used for generating and sending a pre-triggering pulse to the trigger module, and a signal receiving module being connected with the trigger module and being used for receiving the final signal. According to the invention, the requirement on the size of the transformer is low, the miniaturization design is facilitated, the working frequency range is wide, and the limitation on the duty ratio of the signal is small.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a miniaturized low conduction delay digital signal isolation transmission system. Background technique: [0002] Some medium and long-distance communication protocols such as CAN communication require hardware circuits to realize the isolated transmission of communication signals; the driving signals of switching devices in high-power power electronic devices also have isolated transmission requirements. Traditional digital signal isolation and transmission devices are mainly divided into two types: optical coupling isolation mode and magnetic coupling isolation mode. [0003] Optical coupling isolation generally uses an optocoupler. The transmission delay time of the optocoupler is relatively large, the power consumption is relatively large, and at the same time, it brings the problem of large heat generation. In addition, since the optocoupler is based on the principle of photoelec...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a miniaturized low conduction delay digital signal isolation transmission system to solve the defects of large volume of digital isolator transformer and large duty cycle limitation caused in the prior art

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