Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1979-09-17
1981-06-02
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455170, 455195, H04B 116
Patent
active
042715288
ABSTRACT:
A variable pulse rate tuning circuit for use with a channel-selecting system incorporating a single, shaft-encoded tuning knob. The circuit includes a single pulse circuit that generates an individual channel-stepping pulse in response to individual channel-changing pulses derived from the shaft-encoded tuning knob. In addition a pulse adding circuit sensitive to the repetition rate of the channel-changing pulses generates additional stepping pulses during conditions under which a substantial number of channels are sought to be bypassed. The pulse adding circuit includes an integrator to control the operation of a gated RC oscillator.
REFERENCES:
patent: 3671870 (1972-06-01), Wellhausen
patent: 3803495 (1974-04-01), Reynolds
patent: 3835384 (1974-09-01), Liff
GTE Products Corporation
Ng Jin F.
Odozynski John A.
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