Video preamplifier circuit

Details Video preamplifier circuit Video preamplifier circuit

1989-07-26

1991-01-08

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358184, 358186, 333 16, 333 18, H04N 514

Patent

active

049840797

ABSTRACT:
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.

REFERENCES:
patent: 4032974 (1977-06-01), Roessel
patent: 4148069 (1979-04-01), Smiley
patent: 4214261 (1980-07-01), Bazin et al.
patent: 4220931 (1980-09-01), Hines et al.
patent: 4404551 (1983-09-01), Howse
patent: 4588956 (1986-05-01), de Carlieu
patent: 4746881 (1988-05-01), Suzuki

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