Signal strength responsive sound trap

Details Signal strength responsive sound trap Signal strength responsive sound trap

1977-03-02

1978-08-15

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358196, 358904, H04N 9535

Patent

active

041077300

ABSTRACT:
A television receiver signal translating system includes a tuner frequency-converting a received broadcast signal to an intermediate frequency signal. An acoustic surface wave filter and gain controlled amplifier are coupled to the tuner and drive a synchronous detecting system. An automatic gain control (AGC) maintains the output of recovered signal constant while a variable bandwidth stage changes the system frequency response as a function of signal strength. A variable influence sound carrier trap responds to the AGC providing increased sound carrier attenuation when strong signals are received and reduced attenuation during weak signal reception.

REFERENCES:
patent: 2901535 (1959-08-01), Smith
patent: 2901537 (1959-08-01), Comninos
patent: 3872387 (1975-03-01), Banach

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