Receiver

Details Receiver Receiver

1978-09-15

1980-08-12

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455192, 455259, 455263, H04B 132

Patent

active

042175526

ABSTRACT:
A digital tuning receiver having an electrically tuneable tuner and an AFT circuit is driven in a unidirectional sweep by the D/A converted output of a reversible counter. The reversible counter continues to count input pulses, and the unidirectional sweep continues until stopped by the reception of a signal which produces a first signal from an AFT frequency discriminator followed within a predetermined time by a second signal of opposite polarity from the AFT frequency discriminator. The number stored in the stopped reversible counter may be further adjusted by AFT signals and stored for later recall. If the second signal is not received within a predetermined time, as occurs with spurious beat signals, the sweep is not stopped but continues until a proper signal is received.

REFERENCES:
patent: 2951150 (1960-08-01), Rennenkampf
patent: 3388331 (1968-06-01), Rawley
patent: 3864636 (1975-02-01), Fukuda et al.
patent: 3936753 (1976-02-01), Clark
patent: 3988681 (1976-10-01), Schurmann
patent: 4004231 (1977-01-01), Elshuber et al.
patent: 4008436 (1977-02-01), Fujita
patent: 4009442 (1977-02-01), Von Bromssen

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