VIDEO SIGNAL OUTPUT CIRCUIT, AND ELECTRONIC DEVICE USING THE CIRCUIT

摘要

A video signal output circuit (1) comprises a sink-tip clamp circuit (3) for fixing the sink-tip level of a video signal inputted, to a constant voltage, a low-pass filter (4) for filtering out a predetermined high-frequency component from the video signal outputted by the sink-tip clamp circuit (3), a dummy circuit (5) fed with the video signal outputted by the sink-tip clamp circuit (3), for outputting a video signal at substantially the same sink-tip level as that of the video signal outputted by the low-pass filter (4), and an output driver (6) fed with the video signal outputted by the low-pass filter (4), for outputting a video signal at a low-output impedance. The sink-tip clamp circuit (3) makes such a control that the sink-tip level of the video signal outputted by the dummy circuit (5) may be equal to a predetermined reference voltage (V<sub