Frequency synthesizer receiver having memory for storing frequen

Details Frequency synthesizer receiver having memory for storing frequen Frequency synthesizer receiver having memory for storing frequen

1977-09-29

1980-11-25

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455165, 455183, 455186, H04B 126

Patent

active

042362512

ABSTRACT:
A digital frequency synthesizer radio receiver, comprising a scan memory for storing a digital value data concerning a broadcasting frequency; a digital value data entry device for selectively entering a digital value concerning a broadcasting frequency; a preset memory having a plurality of storing locations, each adapted for storing a digital value concerning a specified broadcasting frequency, a channel selector coupled to said preset memory for selecting one of said storing locations thereof, said preset memory being responsive to said channel selector and said digital value data entry device for loading the entered digital value data in the location of the preset memory selected by the channel selector; and a phase locked loop selectively and operatively coupled to either of said scan memory and said preset memory for providing an oscillation frequency signal the frequency of which is associated with the digital value data loaded in the selected one of said scan memory and the preset memory. Preferably, said scan memory comprises a plurality of memories, each allotted for a frequency band, and said preset memory is structured such that each location comprises a plurality of regions, each allotted for a frequency band, whereby a multiband frequency synthesizer radio receiver is provided.

REFERENCES:
patent: 3651469 (1972-03-01), Keese
patent: 3882400 (1975-05-01), Hamada
patent: 3965336 (1976-06-01), Grohmann
patent: 4075567 (1978-02-01), Klank et al.
patent: 4117407 (1978-09-01), Kusakabe

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