Apparatus for detecting a signaling channel during scanning incl

Details Apparatus for detecting a signaling channel during scanning incl Apparatus for detecting a signaling channel during scanning incl

Filed on

1994-05-02

Date issued

1996-04-23

Examiner

Faile, Andrew I.

Patent Class

Telecommunications

SubClass

Transmitter and receiver at same station

SubSubClass

With frequency stabilization

Other Related Categories

455 76, 455 87, 4551612, 4551642, 4551971, 455265, 455266, H04B 140

Type

Patent

Status

active

Patent number

055112358

Description

ABSTRACT:
A receiver has a channel scan mode of operation and a communication mode of operation. In the channel mode of operation, the passband of a filter is narrowed relative to the passband of the filter in the communication mode. According to another aspect of the circuit, a local oscillator is selectively phase locked to an internal clock during channel scanning and locked to the incoming signal during a communication mode operation.

REFERENCES:
patent: 4352208 (1982-09-01), Schroeder
patent: 4563651 (1986-01-01), Ohta et al.
patent: 4703520 (1987-10-01), Rozanski, Jr. et al.
patent: 4977611 (1990-12-01), Maru
patent: 5230086 (1993-07-01), Saul
patent: 5257400 (1993-10-01), Yoshida
patent: 5335364 (1994-08-01), Heinonen

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