JPS58147341U

JPS58147341U - radio receiver

Info

Publication number: JPS58147341U
Application number: JP4427282U
Authority: JP
Inventors: 昇柏木; 山中　栄一郎
Original assignee: 日本電気ホームエレクトロニクス株式会社
Priority date: 1982-03-29
Filing date: 1982-03-29
Publication date: 1983-10-04

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すＦＭラジオ受信機のブ
ロックダイアグラム、第２図は第１図に於ける中間周波
増幅回路の一実施例を示す中間周波変成器の回路図、第
３図は第１図に於ける中間周波増巾回路の帯域中の変化
を示す波形図、第４図は第１図に於ける中間周波増幅回
路の他の実施例を示すブロック回路図である。４・・・中間周波増幅回路、７・・・フィルタ回路、８
・・・増巾回路、９・・・ノイズ成分検波回路、１０・
・・差動増巾回路、２０・・・制御回路、２１・・・キ
ーボード、２２・・・記憶回路、３０・・・・・・検出
回路。FIG. 1 is a block diagram of an FM radio receiver showing an embodiment of the present invention, FIG. 2 is a circuit diagram of an intermediate frequency transformer showing an embodiment of the intermediate frequency amplification circuit in FIG. 1, and FIG. 1 is a waveform diagram showing changes in the band of the intermediate frequency amplifying circuit in FIG. 1, and FIG. 4 is a block circuit diagram showing another embodiment of the intermediate frequency amplifying circuit in FIG. 1. 4...Intermediate frequency amplification circuit, 7...Filter circuit, 8
... Amplification circuit, 9... Noise component detection circuit, 10.
... Differential amplifier circuit, 20 ... Control circuit, 21 ... Keyboard, 22 ... Memory circuit, 30 ... Detection circuit.

Claims

[Scope of utility model registration request]

an intermediate frequency amplification circuit that is switched between at least two types of frequency bands in response to a control signal; a detection circuit that detects the presence or absence of a beat disturbance noise component contained in the received frequency signal; and an output signal of the detection circuit. Basically, at the same time as supplying the control signal to the intermediate frequency amplification circuit, the output signal of the detection circuit is supplied to a storage circuit, and further, the memory of this storage circuit is read out and the control signal is supplied to the intermediate frequency amplification circuit. A radio receiver comprising a control circuit.