Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1976-03-09
1977-10-11
Martin, John C.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 34, 358 65, H04N 9535, H04N 920
Patent
active
040539270
ABSTRACT:
In a circuit for setting a chrominance signal controlling the emission of an electron beam in the picture tube of a color television receiver, the circuit including an amplifier connected to amplify the chrominance signal, with the output of the amplifier being held at a constant voltage level during each horizontal line blanking period by means of a keying pulse, and in which the amplifier is provided with a feedback path including an amplification determining resistance network, keying pulses are fed into the resistance network in such a manner that variation of the resistance presented by the network produces a simultaneous change in the gain of the amplifier and the direct voltage level of the chrominance signal at the output of the amplifier.
REFERENCES:
patent: 3062914 (1962-11-01), Fernald et al.
patent: 3535437 (1970-10-01), Willis
patent: 3921205 (1975-11-01), Fujiwara et al.
patent: 3955212 (1976-05-01), Engel et al.
LICENTIA Patent-Verwaltungs-G.m.b.H.
Martin John C.
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