Tuning voltage tracking arrangement

Details Tuning voltage tracking arrangement Tuning voltage tracking arrangement

1985-03-01

1987-04-14

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455195, 455197, 455191, H04B 116

Patent

active

046584374

ABSTRACT:
A superheterodyne receiver having a plurality of selectable bands includes a tuning voltage source and a band selection signal source. To improve tracking, the receiver includes a selectively enabled voltage modifying arrangement responsive to the band selection signal for providing a modified tuning voltage to one of the radio frequency and local oscillator tuning circuits when the tuning voltage is within a predetermined portion of its range.

REFERENCES:
patent: 3866138 (1975-02-01), Putzer
patent: 3889210 (1975-06-01), Matsuura et al.
patent: 4002986 (1977-01-01), Ma
patent: 4291290 (1981-09-01), Ijichi et al.
patent: 4380827 (1983-04-01), Moon
patent: 4404686 (1983-09-01), Moon
patent: 4418427 (1983-11-01), Muterspaugh
patent: 4418428 (1983-11-01), Evans
patent: 4442548 (1984-04-01), Lehmann
patent: 4476583 (1984-10-01), Muterspaugh

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