Title: Video frequency amplifier operable in either of two bias conditions

Abstract: A video frequency amplifier is biased to provide output signals of a first magnitude. In response to the application of a predetermined control signal, the bias is altered so that output signals are provided of a second, different magnitude. When employed in communications systems of the type in which television images are "frozen" by a storage tube for subsequent transmission on an individual frame basis by a voice-quality telephone link, for example, and subsequently re-created, the control signal indicates whether the system and its storage tube are to operate either in the "transmit" or "receive" mode.

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Inventors: Dorsey, Denis Peter (Levittown, PA, US)
Rodda, William E. (Trenton, NJ, US)

Application Number: 398853
Filing Date: 1973-09-19
Publication_date: 1976-02-03
Assignee: RCA Corporation (New York, NY)
Primary Class(es): 348/707 348/22
Other Classes:
US Patent Ref:

2629010	Feb, 1953	Graham	178/DIG.
2813148	Nov, 1957	Pensak	178/DIG.
3204026	Aug, 1965	Doundaulakis	178/6.
3628166	Dec, 1971	Harford	330/29.

Other Refs:
Primary Examiner: Safourek, Benedict V.
Assistant Examiner: Godfrey, R. John
Attorney: Whitacre; Eugene M., DeCamillis; Mason