Video preamplifier circuit

Details Video preamplifier circuit Video preamplifier circuit

H - Electricity

04

N

350/56

H04N 5/44 (2006.01) H03F 3/72 (2006.01) H04N 5/14 (2006.01) H04N 7/10 (2006.01)

Patent

CA 2019393

A high speed, variable gain video preamplifier circuit disposed on a single IC which can accommodate multiple video input channels supplied by cables of varying length. A multiplexer 34 uses information about the cable length supplied to input pads to selectively connect the outputs of several series connected compensating amplifiers 42(a-b), 44 and 46 to the variable gain amplifier 36. The preamplifier circuit is characterized by a comparative wide common mode input range, as well as being capable of accepting two input channels and providing efficient cable compensation.

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