Digital tuning FM stereophonic receiver including phase locked l

Details Digital tuning FM stereophonic receiver including phase locked l Digital tuning FM stereophonic receiver including phase locked l

1978-10-16

1980-10-14

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455175, 455183, 455185, 455194, H04B 126, H03J 500

Patent

active

042285429

ABSTRACT:
A digital tuning FM stereophonic receiver of the type including a phase locked loop synthesizer. A digital code generating circuit is provided for generating a digital code which consists of several bits to be applied to a programmable frequency divider inserted in the phase locked loop. At least one auxiliary bit is provided together with the bits of the digital code. The information of the auxiliary bit is used to input and hold the digital code to be applied thereto. Muting operation of the FM stereophonic receiver is controlled in accordance with the information of the auxiliary bit.

REFERENCES:
patent: 3937972 (1976-02-01), Snell
patent: 3953800 (1976-04-01), Nakamura et al.
patent: 3962641 (1976-06-01), Suwa
patent: 4015253 (1977-03-01), Goldstein
patent: 4117407 (1978-09-01), Kusakabe
patent: 4131853 (1978-12-01), Dreiske
patent: 4170760 (1979-10-01), Umeda

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