Tuning system for a high frequency receiver utilizing a controll

Details Tuning system for a high frequency receiver utilizing a controll Tuning system for a high frequency receiver utilizing a controll

1982-04-14

1984-05-22

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455195, 455193, 455261, 331 36L, 334 71, H04B 116

Patent

active

044505884

ABSTRACT:
The tuning system for a high frequency receiver, particularly an AM receiver for vehicles, comprises a tunable input resonance circuit having a variable inductance formed by the signal winding of a controllable inductor. The control winding of the inductor is supplied with a control current. The control winding is simultaneously used as the frequency determinative element of an auxiliary oscillator. A frequency control loop is used to adjust the oscillating frequency of the auxiliary oscillator by adjustment of the control current. The tuning system allows a selective coupling between the tuned antenna input circuit and the rf front end of the receiver.

REFERENCES:
patent: 2302893 (1942-11-01), Roberts
patent: 2897352 (1959-07-01), Smith-Vaniz, Jr.
patent: 2926240 (1960-02-01), Gollub
patent: 3076943 (1963-02-01), Cooperman

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