Television picture display device

Details Television picture display device Television picture display device

1980-04-21

1981-12-29

Murray, Richard

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 568

Patent

active

043085555

ABSTRACT:
In a class-B output amplifier having an npn-transistor the collector of which controls a cathode of a picture display tube via oppositely conducting parts of a diode and an emitter follower, respectively, a signal corresponding with the beam current through the relevant cathode is obtained from the collector circuit of an npn-transistor whose base-emitter path is arranged in parallel with the diode. The signal corresponding with the beam current can be used for controlling a background current and for limiting a beam current, respectively.

REFERENCES:
patent: 3674932 (1972-07-01), Griepentrog
patent: 4017681 (1977-04-01), Smeulers et al.
patent: 4126884 (1978-11-01), Shanley
patent: 4218720 (1980-08-01), Kam

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