Automatic beam current limiter with independently determined thr

Details Automatic beam current limiter with independently determined thr Automatic beam current limiter with independently determined thr

1977-05-05

1979-01-30

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 74, H04N 568, H04N 916

Patent

active

041375521

ABSTRACT:
Apparatus for automatically limiting excess beam current conduction of a kinescope in a television signal processing and reproducing system. A control network including an active device (e.g., a transistor) provides a control signal representative of the magnitude of beam current conduction when above a predetermined threshold level. A dynamic operating control range of the active device is determined independent of a threshold control level of the active device by means of a degenerative direct current feedback network associated with the active device. The control signal is coupled to the kinescope for opposing excess current conduction thereof.

REFERENCES:
patent: 3674932 (1972-07-01), Griepentrog
patent: 3804981 (1974-04-01), Avins
patent: 3914545 (1975-10-01), Engel
Engineering Electronics by Ryder; McGraw-Hill Book Co., .COPYRGT.1957, pp. 183-188.

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