AFC Interface circuit

Details AFC Interface circuit AFC Interface circuit

1980-06-30

1981-06-02

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455259, 455261, 455264, H04B 116

Patent

active

042715334

ABSTRACT:
An interface circuit that couples the output of a differential AFC detector to a tuner and in so doing provides a single-ended control signal and a substantially constant reference signal. A bridging circuit combines the differential outputs to effect a substantially constant signal which is appropriately scaled by a referencing circuit so as to develop the reference voltage required. A dividing circuit coupled to one of the differential outputs develops an AFC control voltage having the range required to accommodate the tuner's AFC-responsive circuitry.

REFERENCES:
patent: 3697885 (1972-10-01), Avins et al.
patent: 3934191 (1976-01-01), Garskamp

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