Search type tuning system with direct address channel selection

Details Search type tuning system with direct address channel selection Search type tuning system with direct address channel selection

1979-09-28

1981-09-22

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455182, 455184, 455185, H03J 722

Patent

active

042914132

ABSTRACT:
A signal seeking tuning system includes provisions for allowing the direct selection of channels. It includes a memory for storing lower and upper boundaries of a tuning control voltage range for each channel which may be selected. When a channel is selected, a microcomputer causes the memory location corresponding to one of the boundaries associated with the selected channel to be addressed and causes a tuning voltage generator to change the magnitude of the tuning control voltage in the direction of the boundary. A comparator determines when the tuning control voltage reaches the boundary. Thereafter, the microcomputer controls a signal seeking operation between the boundaries to tune the RF carrier associated with the selected channel.

REFERENCES:
patent: 4031491 (1977-06-01), Sakamoto
patent: 4093921 (1978-06-01), Buss
patent: 4155043 (1979-05-01), Sakamoto
patent: 4209751 (1980-06-01), Sakamoto

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