Luminance clipper with color subcarrier filter to prevent clipping of subcarrier

摘要

A baseband color video signal processor includes a selective transistor clipper for holding luminance components to a maximum level. The base of the transistor is operated at a first voltage below the desired maximum level. A tuned circuit, tuned to the frequency of the chrominance subcarrier, is connected in its emitter-collector path of the transistor for isolating it from chrominance components in the color video signal.