JPH0213337U - - Google Patents
Info
- Publication number
- JPH0213337U JPH0213337U JP8993688U JP8993688U JPH0213337U JP H0213337 U JPH0213337 U JP H0213337U JP 8993688 U JP8993688 U JP 8993688U JP 8993688 U JP8993688 U JP 8993688U JP H0213337 U JPH0213337 U JP H0213337U
- Authority
- JP
- Japan
- Prior art keywords
- audio
- output circuits
- receiving circuit
- output
- audio output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000005236 sound signal Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
第１図は本考案の一実施例に係る利得制御回路
を組込んで構成される音声出力装置の概略構成図
、第２図は従来装置の構成例を示す図である。
１……音声受信回路、２ａ，２ｂ，〜２ｎ……
音声出力回路、３ａ，３ｂ，〜３ｎ……スイツチ
、４ａ，４ｂ，〜４ｎ……音声インターフエース
回路、５ａ，５ｂ，〜５ｎ……受話器、６ａ，６
ｂ，〜６ｎ……回線接続スイツチ、７……回線接
続数検出器、８……負帰還回路（増幅利得制御手
段）。
FIG. 1 is a schematic configuration diagram of an audio output device incorporating a gain control circuit according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the configuration of a conventional device. 1...Audio receiving circuit, 2a, 2b, ~2n...
Audio output circuit, 3a, 3b, ~3n... Switch, 4a, 4b, ~4n... Audio interface circuit, 5a, 5b, ~5n... Receiver, 6a, 6
b, ~6n... Line connection switch, 7... Line connection number detector, 8... Negative feedback circuit (amplification gain control means).
Claims (1)
の出力にスイツチを介して選択的に接続されて上
記受信音声信号を並列に音声出力する音声出力回
路の数を検出する手段と、この検出された音声出
力回路の数に応じて前記音声受信回路における増
幅利得を制御し、前記各音声出力回路における音
声信号の出力レベルを一定化する手段とを具備し
たことを特徴とする利得制御回路。 means for detecting the number of audio output circuits that are selectively connected via a switch to the output of an audio receiving circuit that receives and amplifies audio signals and outputs audio from the received audio signals in parallel; A gain control circuit comprising: means for controlling the amplification gain in the audio receiving circuit according to the number of audio output circuits, and constantizing the output level of the audio signal in each of the audio output circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8993688U JPH0213337U (en) | 1988-07-08 | 1988-07-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8993688U JPH0213337U (en) | 1988-07-08 | 1988-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0213337U true JPH0213337U (en) | 1990-01-26 |
Family
ID=31314474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8993688U Pending JPH0213337U (en) | 1988-07-08 | 1988-07-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0213337U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48102019U (en) * | 1972-02-25 | 1973-11-30 | ||
| JPS48112714U (en) * | 1972-04-01 | 1973-12-24 | ||
| JPS49105517U (en) * | 1972-12-28 | 1974-09-10 | ||
| JPS54162517U (en) * | 1978-04-30 | 1979-11-14 | ||
| JP2006325140A (en) * | 2005-05-20 | 2006-11-30 | Matsushita Electric Works Ltd | Intercom system |
-
1988
- 1988-07-08 JP JP8993688U patent/JPH0213337U/ja active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48102019U (en) * | 1972-02-25 | 1973-11-30 | ||
| JPS48112714U (en) * | 1972-04-01 | 1973-12-24 | ||
| JPS49105517U (en) * | 1972-12-28 | 1974-09-10 | ||
| JPS54162517U (en) * | 1978-04-30 | 1979-11-14 | ||
| JP2006325140A (en) * | 2005-05-20 | 2006-11-30 | Matsushita Electric Works Ltd | Intercom system |
| JP4595671B2 (en) * | 2005-05-20 | 2010-12-08 | パナソニック電工株式会社 | Intercom system |