CN203289526U

CN203289526U - Video signal processing circuit

Info

Publication number: CN203289526U
Application number: CN2013203488978U
Authority: CN
Inventors: 李明; 纪长春
Original assignee: Nanjing Perlove Radial Video Equipment Co Ltd
Current assignee: Nanjing Perlove Radial Video Equipment Co Ltd
Priority date: 2013-06-19
Filing date: 2013-06-19
Publication date: 2013-11-13
Anticipated expiration: 2023-06-19

Abstract

A video signal processing circuit belongs to the technical field of medical equipment. The structure of the video signal processing circuit is composed of a coupling circuit (1), a clamping circuit (2), an isolating circuit (3), a clamping circuit (4) and an output circuit (5). After the direct-current component of input signal is removed by the coupling circuit (1), a signal as same as the alternating-current component of the input signal is obtained and then input in the clamping circuit (2). A preset clamping value is added into the clamping circuit (2) to obtain a required signal, and the required signal is subjected to shaping filtering by the isolating circuit (3) to get a stable signal. The clamping circuit (4) is for setting working points in need. A signal passes through the clamping circuit (4) and the output circuit (5) to get a video signal in need. The video signal processing circuit is advantaged in that the scheme provided is simple and reliable, the system stability is high, the peripheral control is convenient, and the video output is free of distortion when working points at various levels are manually set.

Description

A kind of video processing circuit

Technical field

The utility model belongs to technical field of medical instruments.

Background technology

In technical field of medical instruments, the medical imaging signal after collection is completed except being transferred to display device shows, sometimes miscellaneous part also can gather needed data above video transmission path, this just unavoidably can cause interference to vision signal, causes image to show the unstable situation that affects picture quality that waits.

Summary of the invention

The purpose of this utility model is: the vision signal that collects is processed, got rid of miscellaneous part and gathers the interference of other signal that required data etc. bring vision signal from video transmission path, make the signal stabilization of sending into display device, reliably.

the technical solution of the utility model is: its structure is by coupling circuit, clamp circuit, buffer circuit, clamp circuit, output circuit forms, it is characterized in that: the signal of input obtains entering clamp circuit with the identical signal of the alternating current component of original signal after overcoupled circuits are removed DC component, obtain needed signal after the clamp value that sets that clamp circuit adds, signal obtains stable signal after the buffer circuit shaping filter, the effect of clamp circuit is to set the working point that needs, signal obtains vision signal after clamp circuit and output circuit.

The beneficial effects of the utility model are: scheme is simple and reliable, and the stability of a system is high, and peripheral control is convenient, artificial set needed working point at different levels after, video output is undistorted, to the user, brings better experience.

Description of drawings

Fig. 1: a kind of schematic diagram of video processing circuit.

Embodiment

with reference to accompanying drawing, its structure is by coupling circuit (1), clamp circuit (2), buffer circuit (3), clamp circuit (4), output circuit (5) forms, it is characterized in that: the signal of input obtains entering clamp circuit (2) with the identical signal of the alternating current component of original signal after overcoupled circuits (1) are removed DC component, obtain needed signal after the clamp value that sets that clamp circuit (2) adds, signal obtains stable signal after buffer circuit (3) shaping filter, the effect of clamp circuit (4) is to set the working point that needs, signal obtains vision signal after clamp circuit (4) and output circuit (5).

Its advantage is: scheme is simple and reliable, and the stability of a system is high, and peripheral control is convenient, artificial set needed working point at different levels after, video output is undistorted, to the user, brings better experience.

Claims

1. video processing circuit, its structure is by coupling circuit (1), clamp circuit (2), buffer circuit (3), clamp circuit (4), output circuit (5) forms, it is characterized in that: the signal of input obtains entering clamp circuit (2) with the identical signal of the alternating current component of original signal after overcoupled circuits (1) are removed DC component, obtain needed signal after the clamp value that sets that clamp circuit (2) adds, signal obtains stable signal after buffer circuit (3) shaping filter, the effect of clamp circuit (4) is to set the working point that needs, signal obtains vision signal after clamp circuit (4) and output circuit (5).