Linear isolator

Abstract

The invention discloses a linear isolator, and relates to the field of signal processing. The isolator comprises a bidirectional rectification circuit, an oscillation circuit, a coupling transmissioncircuit, a demodulation circuit and a triode which are connected in sequence. By adopting the linear isolator, isolation transmission of analog signals or digital signals is realized; positive and negative level signals can be received at the same time, the linear isolator is provided with four ports including an input port, an output port, a first grounding end and a second grounding end, the linear or nonlinear four-port optical coupler can be replaced in situ according to the ratio of 1: 1, the isolation function is achieved, and the linear isolator has the advantages of being small in chipsize, low in power consumption, good in performance and high in reliability.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a linear isolator compatible with four-port optocoupler pins. Background technique [0002] In electronic equipment such as military electronic systems, aerospace equipment, and medical equipment, in order to eliminate signal noise and protect devices and users from high voltage damage, isolators are usually added to electronic equipment. [0003] Optocouplers have always been the main choice of isolators, but they have disadvantages such as easy aging, high power consumption, and short life, which limit their usage scenarios. The isolator manufactured using the integrated circuit process has more advantages in terms of power consumption, performance and reliability, and can be used to replace the optocoupler. [0004] However, at present, the integrated circuit isolator used to replace the optocoupler can only transmit digital signals, cannot transmit analog signals, and cannot...

AI Technical Summary

Problems solved by technology

[0004] However, at present, the integrated circuit isolator used to replace the optocoupler can only transmit digital signals, cannot transmit analog signals, and cannot achieve linear isolation, and the existing integrated circuit isolators only support external positive level signal input or external negative level Signal input cannot be realized through an isolator, which can input positive level signals and negative level signals

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