Dual-input signal synchronous detection circuit

Abstract

The invention discloses a dual-input signal synchronous detection circuit. The circuit comprises a signal input module; an input end IN1 and an input end IN2 of the signal input module are respectively connected with a first detection signal output end and a second detection signal output end of an external electronic circuit; the power supply input end VDD1 of the signal input module is connected with the power supply output end of the first power supply module; the output end Z1 of the signal input module is connected with the input end 1 of the signal output module; the output end of the signal input module is connected with the input end 2 of the signal output module; the output end Z3 of the signal input module is connected with the input end 3 of the signal output module; the power supply input end VDD2 of the signal output module is connected with the power supply output end of the second power supply module; the output end OUT of the signal output module is connected with one input / output port of the detection chip. According to the invention, four combination states of two input signals can be represented through one output port, so that precious detection chip hardware resources are saved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a double-input signal synchronous detection circuit. Background technique [0002] At present, the input signal of the electronic circuit usually includes multiple signals, and there is an independent signal detection circuit for each input signal. Each signal detection circuit has a signal output port for outputting a signal to the detection chip, and the output signal usually only has two states of high level and low level. [0003] When the number of input signals is large and the number of output signals increases correspondingly, the input and output port resources of the detection chip will be tight, or even the port resources will be insufficient. [0004] Therefore, there is an urgent need to develop a technology that enables existing detection chips (such as single-chip microcomputers) to simultaneously detect a greater number of input signals with existing ...

AI Technical Summary

Problems solved by technology

[0003] When the number of input signals is large and the number of output signals increases accordingly, the input and output port resources of the detection chip will be tight, or even the port resources will be insufficient.

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