Title:
CIRCUIT FOR SELECTING AMPLITUDE MODULATION RADIO RECEIVER
Document Type and Number:
Japanese Patent JPS5888937
Kind Code:
A
Abstract:
An improved selectivity circuit for amplitude modulation radio receivers (8) includes a relatively narrow band filter (22) placed before the receiver detector (24) and a relatively wide band filter (16) placed just prior to the IF amplifier stages (18, 20). An IF stage (18) controlled by the receiver AGC amplifier (28) is designed to have a saturation or clipping level about 6 dB above the normal IF level for that stage. As a result the selectivity characteristic for the receiver will be approximately rectangular and encompass the IF frequency channel if the bandpass of the narrow band filter (22) is chosen to be the IF frequency channel.
Inventors:
JIYOON DEIITA IDE
DEBITSUTO JIYOO SETSUTORUMAIAA
MARIO KURISUTOBOORU NOBO
DEBITSUTO JIYOO SETSUTORUMAIAA
MARIO KURISUTOBOORU NOBO
Application Number:
JP19880882A
Publication Date:
May 27, 1983
Filing Date:
November 12, 1982
Export Citation:
Assignee:
BENDIX CORP
International Classes:
H04B1/26; H03G3/20; H03G5/24; H04B1/16; (IPC1-7): H04B1/26
Attorney, Agent or Firm:
Masaki Yamakawa