低噪音视频图象采集系统电源设计  

The Low Noise Power Design for the Video Image Acquisition System

作　　者：关永[1] 张杰[2] 刘维民[1] 师怡爽[1] 

机构地区：[1]首都师范大学信息学院,北京100037 [2]北京化工大学信息工程学院,北京100029

出　　处：《电子器件》2005年第2期355-357,共3页Chinese Journal of Electron Devices

摘　　要：视频图象采集系统的电源设计十分重要,如果电源电压的纹波稍大,将严重影响视频A/D芯片的正常工作,分离出的行同步信号也会发生跳变,这些都将使A/D芯片的精度下降,造成图象包含雪花、水印干扰,图象模糊不清。为解决这个问题,介绍一种低噪音的电源方案。实际使用表明:采用新的电源方案使整个系统的稳定性明显提高,且可推广到其它数据采集系统。The power design based on the Video Image Acquisition system is very important. It will make serious influence on the normal work of video A/D's, if the noise of power voltage has a little swing, and the row synchronous signal that separates from A/D's will make some jump. All these events will reduce the precision of A/D's, and will cause the image to contain a large number of snowflakes and watermarks. In order to solve these problems, a kind of low noise power solution based on MAX1793 is introduced. The stability and solidity of the system is rising greatly, and the cost is obviously reduced. It is suited to other Data Acquisition systems.

关 键 词：视频 图象 纹波 电源 嵌入式系统 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置] TN941[自动化与计算机技术—控制科学与工程]