Radio communications system for detecting the coincidence of dec

Details Radio communications system for detecting the coincidence of dec Radio communications system for detecting the coincidence of dec

1983-11-10

1985-11-05

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455 32, 455 34, 455166, H03J 718

Patent

active

045518556

ABSTRACT:
A radio communications system having an automatic tuning frequency scanning operation is provided with a circuit for automatically stopping the frequency scanning operation dependent upon the comparison between the group number information in an output signal from the receiver and a group number which is previously selected by an operator of the system. In order to stop the automatic scanning operation, a signal is produced for controlling the operation of a gate circuit along with a scan signal latch circuit in the frequency synthesizing portion of the system.

REFERENCES:
patent: 3535636 (1970-10-01), Muilwijk
patent: 3840811 (1974-10-01), Blouch
patent: 4392247 (1983-07-01), Van Deursen
patent: 4409687 (1983-10-01), Berti et al.
patent: 4434504 (1984-02-01), Fredrickson

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