Radio receiver

Details Radio receiver Radio receiver

1977-03-30

1980-06-10

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455169, 455184, H04B 126, H04B 132

Patent

active

042075297

ABSTRACT:
An AM/FM receiver provided with a frequency divider for frequency dividing the output frequency of a local oscillator to provide a count output which starts with "1" at the lower limit of a receiving frequency band and thereafter increases its count value for each constant frequency band (as the receiving frequency band is searched), a digital setter for setting a desired receiving frequency, and a comparator supplied with the outputs from the frequency divider and the digital setter to produce an output for gradually increasing or decreasing the output frequency of the local oscillator until the outputs from the frequency divider and the comparator come to coincide with each other. A desired broadcasting wave is automatically tuned with such a simple construction.

REFERENCES:
patent: 3467870 (1969-09-01), Aoyama
patent: 3943449 (1976-03-01), Hendrickson et al.
patent: 3956702 (1976-05-01), Tanaka
patent: 3988681 (1976-10-01), Schurmann
patent: 4004232 (1977-01-01), Amaya
patent: 4023108 (1977-05-01), Torii
patent: 4053838 (1977-10-01), Amaya
patent: 4070629 (1978-01-01), Merrell
patent: 4110695 (1978-08-01), Klank et al.

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