Automatic CRT tracking circuit

Details Automatic CRT tracking circuit Automatic CRT tracking circuit

1980-08-18

1982-07-27

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 568

Patent

active

043420486

ABSTRACT:
An automatic CRT tracking circuit for a television receiver includes an amplifier having adjustable gain and offset transfer functions for coupling a video signal to the cathode of the CRT electron gun. Feedback loops are used to adjust both the gain and offset transfer functions of the amplifier, either independently of each other or in a common mode, to compensate for changing cathode voltage versus cathode current characteristics such that a desired video signal versus cathode current relationship is achieved despite variations in the CRT.

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patent: 4160995 (1979-07-01), Jensen
patent: 4253121 (1981-02-01), Avery
patent: 4263622 (1981-04-01), Hinn

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