Radio receiver with bandwidth switching

Details Radio receiver with bandwidth switching Radio receiver with bandwidth switching

1978-06-28

1982-10-26

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455197, 455200, 455205, 455266, H04B 116

Patent

active

043565670

ABSTRACT:
An automatic IF amplifier band width switching circuit is provided in which band width is switched from broad to narrow in response to either high frequency noise or a predetermined magnitude of interference voltage when the FM detection output is at zero volts. The switching signal may be combined with a hum signal from the tuning knob so that only switching in one direction is possible after tuning is complete.

REFERENCES:
patent: 2927997 (1960-03-01), Day
patent: 2969459 (1961-01-01), Hern
patent: 3649919 (1972-03-01), Fridman et al.
patent: 3827387 (1975-03-01), Banach
patent: 4030036 (1977-06-01), Kusano
patent: 4124817 (1978-11-01), Takahashi

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