Entry apparatus of digital value in memory

Details Entry apparatus of digital value in memory Entry apparatus of digital value in memory

1979-05-16

1984-08-14

Sloyan, T. J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455183, 455186, H03J 500

Patent

active

044661274

ABSTRACT:
A radio receiver having a counter which generates a count value corresponding to the frequency of a station to be received which value is stored in a memory through a load enable signal produced when a ramp voltage reaches a value corresponding to a comparison voltage set to correspond to the frequency. The stored count value controls a programmable divider of a phase lock loop circuit to cause the oscillator of the circuit to produce the correct local oscillator frequency to be received. An N-nary counter permits only every Nth count value to be stored in the memory to correspond to the frequency spacing between stations.

REFERENCES:
patent: 3849635 (1974-11-01), Freedman
patent: 3990027 (1976-11-01), Kawashima
patent: 4023108 (1977-05-01), Torii

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