Circuit for improving the tuning behavior of a receiver frequenc

Details Circuit for improving the tuning behavior of a receiver frequenc Circuit for improving the tuning behavior of a receiver frequenc

1984-08-02

1986-08-19

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455194, 455249, 455263, H04B 126, H04B 110

Patent

active

046073922

ABSTRACT:
The invention relates to a receiver circuit comprising a loop in which the oscillator frequency is controlled by the useful signal. The loop gain in the useful tuning range is negative and greater than unity. An attenuator is provided which is controlled by a control circuit so that larger deviations of the intermediate frequency loop from a target value result in the loop gain being reduced, improving the receiver tuning behaviour.

REFERENCES:
patent: 3619492 (1971-11-01), Evans
patent: 3678394 (1972-07-01), Ebisch
patent: 3869674 (1975-03-01), Borbely
patent: 3965423 (1976-06-01), Fish, Jr.

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