JPS588247U

JPS588247U - vehicle radio receiver

Info

Publication number: JPS588247U
Application number: JP10119981U
Authority: JP
Inventors: 福原　裕成; 憲夫藤木
Original assignee: 日産自動車株式会社
Priority date: 1981-07-09
Filing date: 1981-07-09
Publication date: 1983-01-19

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来例を示した回路ブロック図、第２図は第１
図の従来例における雑音除去動作を示した信号波形図、
第３図は本考案の一実施例を示した回路ブロック図、第
４図は第３図の実施例にお゛けるローパスフィルタの周
波数特性図、第５図は第３図の実施例における雑音除去
動作による信号波形図である。卜・・雑音検出回路、２・・・検波回路、３・・・遅延
回路、４・・・雑音除去回路、５・・・ゲートスイッチ
、１０・・・ローパスフィルタ、１２・・・バッファア
ンプ、Ｒ１−Ｒ４，Ｒ，。・・・抵抗、Ｃ１，Ｃ２，Ｃ
□。・・・コンデンサ。Figure 1 is a circuit block diagram showing a conventional example, and Figure 2 is a circuit block diagram showing a conventional example.
A signal waveform diagram showing the noise removal operation in the conventional example shown in the figure.
Fig. 3 is a circuit block diagram showing one embodiment of the present invention, Fig. 4 is a frequency characteristic diagram of the low-pass filter in the embodiment of Fig. 3, and Fig. 5 is a noise noise diagram in the embodiment of Fig. 3. FIG. 6 is a signal waveform diagram due to a removal operation.卜...Noise detection circuit, 2...Detection circuit, 3...Delay circuit, 4...Noise removal circuit, 5...Gate switch, 10...Low pass filter, 12...Buffer amplifier, R1-R4,R,. ...Resistance, C1, C2, C
□. ...Capacitor.

Claims

[Scope of utility model registration request]

In a noise removal device that, when detecting pulsed noise, cuts off the output of an audio signal while the noise is being detected, and instead outputs a signal that maintains the audio signal level at the audio signal level immediately before the blocking, A vehicle radio receiver characterized by having a filter that cuts high frequency components of an audio signal from which noise has been removed.