Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1980-08-14
1982-02-23
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455164, 455169, 455182, 455184, 455186, 3581921, 3581931, H04B 116, H03J 718, H04N 550
Patent
active
043172253
ABSTRACT:
In a tuning system for generating a tuning voltage for tuning a television receiver, channel identification apparatus includes a memory for storing binary signals representing boundary voltages having magnitudes corresponding to magnitudes of the tuning voltage between tuning voltage ranges for respective adjacent channels. As the memory locations are addressed, the boundary voltages are compared to the tuning voltages. Control apparatus causes the memory location associated with the next boundary voltage to be addressed and causes channel number apparatus to generate binary signals representing the next channel number when the magnitude of a predetermined one of the boundary voltage associated with an addressed one of the memory locations and the tuning voltage exceeds the magnitude of the other one. Display apparatus displays the channel number represented by the binary signals generated by the channel number apparatus.
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patent: 4209751 (1980-06-01), Sakamoto
"A Microcomputer Controlled Freq. Synthesizer for TV" by Rzeszewski et al., 2/18/78.
Henderson John G. N.
Wine Charles M.
Emanuel P. M.
Ng Jin F.
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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