Gamma correction circuit

Details Gamma correction circuit Gamma correction circuit

1976-04-08

1977-03-29

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

178DIG16, 307230, 328142, 328145, H04N 520

Patent

active

040150798

ABSTRACT:
A gamma correction circuit is disclosed which includes an amplifier for amplifying a video input signal, a series connection of diode connected transistors whose input terminal is coupled to the output terminal of the amplifier and a cascade connection of emitter follower transistors whose output terminal is connected to the output terminal of the series connection of the diode connected transistors and is grounded through a resistor and whose input terminal is supplied with control signals.

REFERENCES:
patent: 3239694 (1966-03-01), Rovell
patent: 3341654 (1967-09-01), Pay et al.
patent: 3371269 (1968-02-01), Wattson
patent: 3386081 (1968-05-01), Varsos
patent: 3428884 (1969-02-01), Nordahl
patent: 3622699 (1971-11-01), Richeson, Jr.
patent: 3633121 (1972-01-01), Bretl
patent: 3708615 (1973-01-01), Wharton
patent: 3793480 (1974-02-01), Waehner

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