Differential operational amplification circuit for image processing system, and image processing system

Abstract

The invention discloses a differential operational amplification circuit for an image processing system, and the image processing system, wherein the differential operational amplification circuit comprises a first input resistor and a second input resistor, a differential operational amplifier, a first feedback resistor and a second feedback resistor, wherein a first end of the differential operational amplifier is connected with an output end of a thermal imaging sensor through the first input resistor, a second input end of the differential operational amplifier is connected with a reference voltage circuit through the second input resistor, and the reference voltage circuit is used for providing fixed reference voltage; the first feedback resistor is connected between the first input end and a first output end of the differential operational amplifier; the second feedback resistor is connected between the second input end and the second output end of the differential operational amplifier. With the differential operational amplification circuit and the image processing system provided by the invention, a single-end varying electric signal is changed into a dual-end varying differential signal, thus, dynamic range of the signal is improved, input requirements of post-end high-speed differential AD sampling are satisfied, anti-interference ability of the signal is improved, noise resistance and electromagnetic interference resistance are improved, and quality of image acquisition is guaranteed from hardware.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a differential operational amplifier circuit and an image processing system for an image processing system. Background technique [0002] Image acquisition generally includes the acquisition of visible light images and the acquisition of infrared images. Visible light images are usually collected by commonly used cameras on the market, while infrared images are usually collected by thermal imaging sensors (or infrared thermal imaging sensors). [0003] As the front-end information acquisition component in the image processing system, the infrared thermal imaging sensor is an important component that converts optical signals (infrared light signals) into electrical signals. The electrical signals collected often have common-mode noise and interference, and these common-mode Noise and interference will greatly affect signal transmission and post-imaging processing, resul...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of common-mode noise and interference in the electrical signals collected by thermal imaging sensors in the prior art, reducing the quality of signal transmission and affecting the imaging effect, thereby providing a differential operational amplifier circuit and image processing system for image processing systems. processing system

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