JPS6027596U

JPS6027596U - microphone output signal amplifier

Info

Publication number: JPS6027596U
Application number: JP11710583U
Authority: JP
Inventors: 高志岡本
Original assignee: パイオニア株式会社
Priority date: 1983-07-29
Filing date: 1983-07-29
Publication date: 1985-02-25

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図は本考案の一実施例を示す回路図、第２図は本考
案の一実施例の作用の説明に供する周波数特性歯、第３
図は本考案の他の実施例を示す回路図、第４図は本考案
の他の実施例の作用の説明に供する周波数特性図である
。１・・・・・・マイクジャック、２・・・・・・増幅回
路、３および４・・・・・田−パスフィルタを構成する
抵抗およびコンデンサ、５・・・・・・トランジスタ、
６および６Ａ・・・・・・バイパスフィルタ、７・・・
・・・整流回路、８・・・・・・積分回路、９・・・・
・・反転増幅器、１１・・・・・・電圧制御ローパスフ
ィルタ。Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a frequency characteristic diagram for explaining the operation of an embodiment of the present invention, and Fig.
The figure is a circuit diagram showing another embodiment of the present invention, and FIG. 4 is a frequency characteristic diagram for explaining the operation of another embodiment of the present invention. 1...Microphone jack, 2...Amplification circuit, 3 and 4...Resistor and capacitor constituting the field-pass filter, 5...Transistor,
6 and 6A... Bypass filter, 7...
... Rectifier circuit, 8... Integrator circuit, 9...
...Inverting amplifier, 11...Voltage control low-pass filter.

Claims

[Scope of utility model registration request]

a bypass filter that passes a predetermined band in the microphone output signal, a rectifier circuit that rectifies the output of the bypass filter, an integration circuit that integrates the output of the rectification circuit, and a pass band of the microphone output signal by the output of the integration circuit. A microphone output signal amplifier comprising: a low-pass filter for controlling the microphone output signal amplifier;