JPS59114620U

JPS59114620U - IBC circuit

Info

Publication number: JPS59114620U
Application number: JP871883U
Authority: JP
Inventors: 伸太郎五味
Original assignee: パイオニア株式会社
Priority date: 1983-01-25
Filing date: 1983-01-25
Publication date: 1984-08-02

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図は従来のＩＢＣ回路の一例を示す回路図、第２図
は第１図に示す回路の特性図、第３図はこの考案による
ＩＢＣ回路の一実施例を示す回路図、第４図は第３図に
示すリミッタ回路の一例を示す回路図、第５図は第３図
に示す回路の特性図、第６図、第７図は他の実施例を示
す回路図である。１・・・マイク、２・・・プリエンファシス回路、３・
・・マイクアンプ、６・・・スプラッタフィルタ、７・
・・リミッタ回路。補正　昭５＆　　３．８考案の名称を次のように補正する。 ■ＩＤＣ回路実用新案登録請求の範囲、図面の簡単な説明を次のよう
に補正する。− Ｏ実用新案登録請求の範囲利得制御可能なマイクアンプと、リミッタ回路とを備え
たＩＤＣ回路において、前記リミッタ回路の出力信号を
前記マイクアンプの利得制御用信号に用いて、ＡＧＣ回
路を形成したことを特徴とするＩＤＣ回路。図面の簡単な説明　　　　　　　　　　　　　　−第１
図は従来のＩＤＣ回路の一例を示す回路図、第２図は第
１図に示す回路の特性図、第３図はこの考案によるＩＤ
Ｃ回路の一実施例を示す回路図、第４図は第３図に示す
リミッタ回路の一例を示す回路図、第５図は第３図に示
す回路の特性図、第６図、第７図は他の実施例を示す回
路図である。１・・・マイク、２・・・プリエンファシス回路、３−
・・マイクアンプ、６・・・スプラッタフィルタ、７・
・・リミッタ回路。Fig. 1 is a circuit diagram showing an example of a conventional IBC circuit, Fig. 2 is a characteristic diagram of the circuit shown in Fig. 1, Fig. 3 is a circuit diagram showing an embodiment of the IBC circuit according to this invention, and Fig. 4 3 is a circuit diagram showing an example of the limiter circuit shown in FIG. 3, FIG. 5 is a characteristic diagram of the circuit shown in FIG. 3, and FIGS. 6 and 7 are circuit diagrams showing other embodiments. 1...Microphone, 2...Pre-emphasis circuit, 3.
・・Microphone amplifier, 6・・Splatter filter, 7・
...Limiter circuit. Amendment 1975 & 3.8 The name of the invention is amended as follows. ■IDC circuit utility model registration The scope of the claims and the brief description of the drawings are amended as follows. - O Utility Model Registration Claims In an IDC circuit comprising a gain controllable microphone amplifier and a limiter circuit, an AGC circuit is formed by using the output signal of the limiter circuit as a gain control signal of the microphone amplifier. An IDC circuit characterized by the following. Brief explanation of the drawing - 1st
The figure is a circuit diagram showing an example of a conventional IDC circuit, Figure 2 is a characteristic diagram of the circuit shown in Figure 1, and Figure 3 is an ID according to this invention.
A circuit diagram showing an example of the C circuit, FIG. 4 is a circuit diagram showing an example of the limiter circuit shown in FIG. 3, FIG. 5 is a characteristic diagram of the circuit shown in FIG. 3, and FIGS. 6 and 7. FIG. 3 is a circuit diagram showing another embodiment. 1...Microphone, 2...Pre-emphasis circuit, 3-
・・Microphone amplifier, 6・・Splatter filter, 7・
...Limiter circuit.

Claims

[Scope of utility model registration request]

In an IBC circuit including a gain controllable microphone amplifier and a limiter circuit, an output signal of the limiter circuit is used as a gain control signal of the microamplifier to control the AGC.
An IBC circuit characterized by forming a circuit.