JPS58149848U - intercom device - Google Patents
intercom deviceInfo
- Publication number
- JPS58149848U JPS58149848U JP4741082U JP4741082U JPS58149848U JP S58149848 U JPS58149848 U JP S58149848U JP 4741082 U JP4741082 U JP 4741082U JP 4741082 U JP4741082 U JP 4741082U JP S58149848 U JPS58149848 U JP S58149848U
- Authority
- JP
- Japan
- Prior art keywords
- audio signal
- amplifier
- signal line
- speaker
- audio
- 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
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
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
第１図は従来例のインターホン装置の具体回路図、第２
図は本考案の実施例の具体回路図である。
１は第１のマイク、２は第１の増巾器、３は音声信号線
、４は子機、５は第１のスピーカ、６は親機、７は第２
のマイク、８は第２の増巾器、９は第２のスピーカを示
す。Figure 1 is a specific circuit diagram of a conventional intercom device;
The figure is a specific circuit diagram of an embodiment of the present invention. 1 is the first microphone, 2 is the first amplifier, 3 is the audio signal line, 4 is the slave unit, 5 is the first speaker, 6 is the base unit, 7 is the second
, 8 is a second amplifier, and 9 is a second speaker.
Claims (1)
芯の音声信号線に送出すると共に音声信号線を介して送
られてきた子機からの信号を音声信号として出力する第
１のスピーカを有する親機と、第２のマイクからの音声
入力を第２の増巾器□ を介して前記音声信号線に送
出すると共に親機からの信号を音声信号線を介して第２
のスピーカを通じて音声出力する子機とにて通話可能と
したインターホン装置において、第１．第２の増巾器の
出力端を、２芯の音声信号線の両極間に接続された抵抗
の適宜な分割点に夫々接続し、前記抵抗の両端に第１．
第２のスピーカを並列に夫々接続し、分割された各分割
抵抗の値を略等しくすることにより、自局の第１若しく
は第２の増巾器からの音声信号による前記抵抗の両端に
あられれる電位差を略零にせしめて成ることを特徴とす
るインターホン装置。The audio input from the first microphone is passed through the first amplifier to 2
A base unit has a first speaker that outputs the signal from the slave unit sent to the core audio signal line as well as an audio signal sent via the audio signal line, and a second speaker that outputs the audio signal from the second microphone as an audio signal. The second amplifier □ is used to send the signal to the audio signal line, and the signal from the base unit is sent to the second audio signal line via the audio signal line.
In the intercom device that enables a call with a handset that outputs audio through the speaker of the first. The output ends of the second amplifier are connected to appropriate dividing points of a resistor connected between the poles of a two-core audio signal line, and the first amplifier is connected to both ends of the resistor.
By connecting the second speakers in parallel and making the values of the divided resistors approximately equal, the audio signal from the first or second amplifier of the local station can be applied to both ends of the resistors. An intercom device characterized in that the potential difference is reduced to approximately zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4741082U JPS58149848U (en) | 1982-03-31 | 1982-03-31 | intercom device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4741082U JPS58149848U (en) | 1982-03-31 | 1982-03-31 | intercom device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58149848U true JPS58149848U (en) | 1983-10-07 |
Family
ID=30058369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4741082U Pending JPS58149848U (en) | 1982-03-31 | 1982-03-31 | intercom device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58149848U (en) |
-
1982
- 1982-03-31 JP JP4741082U patent/JPS58149848U/en active Pending
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