Device for detecting the tuning frequency of a frequency modulat

Details Device for detecting the tuning frequency of a frequency modulat Device for detecting the tuning frequency of a frequency modulat

1981-09-15

1983-09-06

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455183, 455192, 455208, 455263, H04B 116

Patent

active

044033451

ABSTRACT:
A device comprising a demodulator, equipped with a frequency synthesizer for synthesizing different tuning frequencies, for use in radio receivers. The device further comprises a counter for counting the number of "clicks" at the demodulator output, for each tuning frequency. A microprocessor is provided for identifying the tuning frequency for which there is a minimum of "clicks," this being the correct tuning frequency. The microprocessor acts on the synthesizer for tuning the frequency of the synthesizer at the correct tuning frequency.

REFERENCES:
patent: 4004231 (1977-01-01), Elshuber et al.
patent: 4174501 (1979-11-01), Chastagnier et al.
patent: 4271530 (1981-06-01), Van Deursen
patent: 4348772 (1982-09-01), Leland et al.

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