Kinescope driver with kinescope current sensing circuit

Details Kinescope driver with kinescope current sensing circuit Kinescope driver with kinescope current sensing circuit

1985-07-25

1987-02-10

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 74, H04N 553, H04N 568, H04N 916

Patent

active

046426965

ABSTRACT:
A television receiver includes a kinescope and a current sensing transistor for conveying amplified video signals to the kinescope, and for providing at a sensing output terminal an output signal related to the magnitude of kinescope current conducted during given sensing intervals. A clamping circuit clamps the sensing output terminal during normal image intervals, and unclamps the sensing output terminal during the sensing intervals. The clamping circuit facilitates interfacing the sensing transistor with utilization circuits which process the sensed output signal, and assists to maintain a proper operating condition for the sensing transistor.

REFERENCES:
patent: 4319166 (1982-03-01), Lavigne
patent: 4484229 (1984-11-01), Parker
patent: 4513322 (1985-04-01), Filliman
patent: 4523233 (1985-06-01), Tallant
Technical publication for Digit 2000 Digital TV System, ITT Corp., p. 61, FIGS. 3-5.
Schematic circuit diagram of Matsushita color television receiver Model No. TH 21-H500GR.

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