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Self-adaptive single-ended and differential signal input interface circuit

A technology for inputting interface circuits and differential signals, which is applied in the directions of logic circuit interface devices, logic circuit connection/interface layout, reliability improvement and modification, etc. simple effect

Pending Publication Date: 2021-11-30
HEFEI I TEK OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an input interface circuit for adaptive single-ended and differential signals, aiming to solve the problem that existing interface circuits cannot adapt single-ended signals and differential signals

Method used

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  • Self-adaptive single-ended and differential signal input interface circuit
  • Self-adaptive single-ended and differential signal input interface circuit
  • Self-adaptive single-ended and differential signal input interface circuit

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Embodiment Construction

[0022] In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.

[0023] Such as figure 1 As shown, this embodiment discloses an input interface circuit for adaptive single-ended and differential signals, including: a differential receiving module 10, an input interface module 20, an anti-backflow and current limiting module 30, and a threshold voltage generating module 40, the input interface Including input terminal A and input terminal B, the input positive terminal of the differential receiving module 10 is connected to the input terminal A, the input negative terminal of the differential receiving module 10 is respectively connected to the input terminal B and the anti-backflow and current limiting module 30, the anti...

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Abstract

The invention discloses a self-adaptive single-ended and differential signal input interface circuit, and belongs to the technical field of interface circuits, the self-adaptive single-ended and differential signal input interface circuit comprises a differential receiving module, an input interface module, an anti-backflow and current-limiting module and a threshold voltage generation module; the input interface module comprises an input end A and an input end B, the input positive end of the differential receiving module is connected with the input end A, the input negative end of the differential receiving module is connected with the input end B and the anti-backflow and current-limiting module, and the anti-backflow and current-limiting module is connected with the threshold voltage generation module. The interface circuit can automatically adapt to a single-ended signal and a differential signal, control switching is not needed, and the structure is simple.

Description

technical field [0001] The invention relates to the technical field of interface circuits, in particular to an input interface circuit for adaptive single-end and differential signals. Background technique [0002] The general-purpose input interface used in the industrial field has complex and diverse level formats. Devices equipped with a general-purpose input interface often need to support both single-ended general-purpose input signals and differential general-purpose input signals. It is a valid input, when the input is greater than a certain threshold, it means logic level 1, and when it is less than a certain threshold, it means logic level 0; the differential signal is valid input based on the voltage difference between the positive and negative terminals of the differential signal line, and the difference is greater than a certain threshold When , it means logic level 1, and when it is less than a certain threshold, it means logic level 0. [0003] The universal i...

Claims

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Application Information

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IPC IPC(8): H03K19/0175H03K19/003
CPCH03K19/017509H03K19/003
Inventor 杨晨飞唐世悦张光宇曹桂平
Owner HEFEI I TEK OPTOELECTRONICS CO LTD
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