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LMV721搭建CVBS放大电路

Other Parts Discussed in Thread: LMV721, OPA693, LMV321

你好:

    目前用LMV721芯片搭建了一个CVBS信号放大电路,发现视频输出的color burst的幅值才140MV,怎么都无法放大,请帮忙看下电路那边不合适,多谢;