Control assembly for electronic tuning receivers

Details Control assembly for electronic tuning receivers Control assembly for electronic tuning receivers

1980-02-26

1981-11-10

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455177, 455165, 74 1027, H03J 730

Patent

active

043002382

ABSTRACT:
A digital oscillator is provided which has digital oscillation outputs corresponding to the sweep speed of the local oscillation frequency of a local oscillator included in an electronic tuning radio receiver. An oscillation frequency controlling element which forms an external oscillation frequency control section of the digital oscillator and a circuit constant variable upon variations in its working length, is mounted on an operator operable knob shaft on the operational panel of the radio receiver around the rotation path of a sweep speed controlling element mounted coaxially thereto. The sweep speed controlling element and the oscillation frequency controlling element are connected to an input section of the digital oscillator. There is further provided a Distance/LOCAL receiver mode selecting element coaxially on the knob shaft.

REFERENCES:
patent: 2589331 (1952-03-01), Broos
patent: 2958771 (1960-11-01), Mural et al.
patent: 3177432 (1965-04-01), Kelln

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