Receiving channel number indication system for television receiv

Details Receiving channel number indication system for television receiv Receiving channel number indication system for television receiv

1980-05-12

1981-07-28

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

3581921, H04B 126, G01R 2310

Patent

active

042814146

ABSTRACT:
An indication system for a television receiver displays a receiving channel number directly from a local oscillation signal of the turner and a signal showing the receiving band associated with the operation of the tuner. An initial value signal is generated from the signal showing the receiving band. The value of the initial value signal is subtracted from the result of counting the local oscillation signal for a predetermined length of time. The resulting difference is divided into six parts, thus producing a pulse signal coincident with the receiving channel number which is to be displayed on an indicator.

REFERENCES:
patent: 3509484 (1970-04-01), Basse et al.
patent: 3851254 (1974-11-01), Merrell et al.
patent: 3983491 (1976-09-01), Yoshisato

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