Command signal generator for an automatic channel selection devi

Details Command signal generator for an automatic channel selection devi Command signal generator for an automatic channel selection devi

1978-03-13

1979-11-13

Bookbinder, Marc E.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325469, 343205, H04B 360, H04B 126

Patent

active

041745019

ABSTRACT:
This device which can be used in a phase or frequency modulation receiver, is connected to the output of the frequency discriminator of the receiver and comprises means for forming a logic signal which indicates the presence or absence of noise, a gate which transmits the clock pulses when a logic signal indicates the presence of noise, means for counting the transmitted clock pulses and for supplying a command signal for controlling a channel selection device, either which during a sequence of n time intervals .tau. a number of pulses counted during each time interval .tau. attains a first threshold, or when the number of pulses counted during a time interval .tau. attains a second threshold which is higher than the first threshold.

REFERENCES:
patent: 2521696 (1950-09-01), De Armond
patent: 3160813 (1964-12-01), Biggi et al.
patent: 3806819 (1974-04-01), Leonard
patent: 3983492 (1976-09-01), Fisher et al.
patent: 4092600 (1978-05-01), Zimmermann et al.

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