Television tuning system with means to prevent loss of informati

Details Television tuning system with means to prevent loss of informati Television tuning system with means to prevent loss of informati

1981-10-13

1984-06-26

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455343, 358190, 365229, H04B 116, G11C 500

Patent

active

044570210

ABSTRACT:
A television tuning system with a circuit for preventing the loss of information during power outages is disclosed. A disable signal is generated in response to the interruption of a mains power supply. In response to the disable signal, a series of fixed signals are applied to at least one of the date and address terminals of a memory containing the information to be preserved. An appropriate signal for preventing the information stored in the memory from being changed during the period in which the disable signal is generated is also applied to the memory.

REFERENCES:
patent: 3859638 (1975-01-01), Hume, Jr.
patent: 3980935 (1976-09-01), Worst
patent: 4122359 (1978-10-01), Breikss
patent: 4137502 (1979-01-01), Maddaloni
patent: 4227257 (1980-10-01), Sato
patent: 4301540 (1981-11-01), Sato et al.

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