Memory tuning system with different speeds in program and operat

Details Memory tuning system with different speeds in program and operat Memory tuning system with different speeds in program and operat

1975-12-18

1977-12-13

Pitts, Harold I.

325468, H04B 106

Patent

active

040631788

ABSTRACT:
An all-channel two mode television tuning system includes a two speed counter for generating channel numbers to adjust tuning. An 82 .times. 1 bit read/write memory is addressed in a program mode by the generated channel numbers to provide locations for storage of signals for tuning to preselected channels. In the operate mode channel numbers are again generated and logic circuitry accesses the memory locations to determine if generated channel numbers correspond to preselected channel numbers. Mode selection means control the two speed counter to provide a faster speed in the operate mode than in the program mode. Channel number generation is automatically stopped in the operate mode when correspondence with a preselected channel number is determined.

REFERENCES:
patent: 3821651 (1974-06-01), Fathaver
patent: 3835384 (1974-09-01), Liff
patent: 3943449 (1976-03-01), Hendickson

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