G2 Set-up circuit for a television receiver

Details G2 Set-up circuit for a television receiver G2 Set-up circuit for a television receiver

1981-03-16

1982-08-31

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 65, H04N 962, H04N 920

Patent

active

043475280

ABSTRACT:
A circuit is disclosed for establishing proper video output voltages in a color television receiver prior to setting the receiver's G2 voltage. In the preferred embodiment, the circuit includes three emitter follower stages, each coupled to the output of a video amplifier. The collectors of the emitter follower stages are coupled to a supply voltage through a common resistance. A two position switch is connected across the common resistance such that, during normal receiver operation, closure of the switch shunts the common resistance. When G2 set-up is to be effected, the switch is opened so that a predetermined voltage is dropped across the common resistance and the three emitter follower stages have similar, predetermined D.C. output voltages.

REFERENCES:
patent: 3670095 (1972-06-01), Arumugham

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