Signal level matching circuit for bias adjustment

摘要

The present invention relates to a signal level matching circuit for controlling bias in which a RGB signal level is checked by performing a digital control in controlling a cilia cut-off bias circuit, and a signal level matching circuit for amplifying a video signal to a predetermined level A buffer 20 for buffering a signal of the video preamplifier 10 and a buffer 20 for amplifying the buffered signal to a predetermined level again and outputting the amplified signal to a cilia 60. The video preamplifier 10, And a bias adjusting circuit 40 for adjusting a bias of the video output amplifier 30. The circuit 20 includes a buffer 20 for adjusting the bias of the monitor, Inverting and amplifying the input horizontal blanking signal so that the same RGB signal is input to the base of the transistor Q1 And a horizontal blanking output circuit 70 connected to the horizontal blanking output circuit.