Videovorverstärkerschaltung

摘要

A high speed, variable gain video preamplifier circuit disposed on a single integrated circuit (10) can accommodate multiple video input channels supplied by cables (16, 22) of varying length. A multiplexer (34) uses information about the cable length supplied to input pads (28, 30, 32) to selectively connect the outputs of several series connected compensating amplifiers (42a, 42b, 44 and 46) to a variable gain amplifier (36).