Title: Noise reducing circuit for video signals

Abstract: A noise reducing circuit for video signals, in which a transistor has its base connected to a video detector and its collector to a direct current source through a coil, two diodes have their cathodes connected together and grounded through a first resistor with the anode of one of the diodes connected to one end of the coil and that of the other diode connected to the other end thereof, the collector of the transistor is further connected through a capacitor and a second resistor to the input terminal of a video output amplifier, which input terminal is grounded through a third resistor, and the emitter of the transistor is connected through another coil to the said terminal and grounded through another capacitor and a variable resistor.

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Other info:

Inventors: Saiki, Yukimi (Yokohama, JA)
Ogino, Masanori (Yokohama, JA)
Watanabe, Shutoku (Ashiya, JA)

Application Number: 633114
Filing Date: 1975-11-18
Publication_date: 1977-06-21
Assignee: Hitachi, Ltd. (JA)
Primary Class(es): 348/623 327/74, 348/630, 455/312
Other Classes:
US Patent Ref:

3333055	Jul, 1967	Krause	178/DIG.
3602737	Aug, 1971	Radecke	178/DIG.
3609224	Sep, 1971	O'Toole	358/31.
3715477	Feb, 1973	Olson	178/DIG.

Other Refs:
Primary Examiner: Martin, John C.
Assistant Examiner:
Attorney: Craig & Antonelli