公开(公告)号：FR2719437B1

公开(公告)日：1999-05-14

申请号：FR9502934

申请日：1995-03-14

Applicant: MOTOROLA INC

Inventor： DUONG MING H ,  DORSEY DONALD A ,  JOHNSON ROBERT M JR

IPC: H03J1/00 ,  H03J3/08 ,  H04Q7/22

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.

公开(公告)号：FR2719437A1

公开(公告)日：1995-11-03

申请号：FR9502934

申请日：1995-03-14

Applicant: MOTOROLA INC

Inventor： DUONG MING H ,  DORSEY DONALD A ,  JOHNSON ROBERT M JR

IPC: H03J1/00 ,  H03J3/08 ,  H04Q7/22

Abstract: A receiver (100) has a channel scan mode of operation and a communication mode of operation. In the channel mode of operation, the passband of a filter (145, 144) is narrowed relative to the passband of the filter in the communication mode. According to another aspect of the circuit, a local oscillator (112, 142, 157) is selectively phase locked to an internal clock (137) during channel scanning and locked to the incoming signal during a communication mode operation.