JPS6047379U - On/off signal detection circuit from terminal equipment - Google Patents
On/off signal detection circuit from terminal equipmentInfo
- Publication number
- JPS6047379U JPS6047379U JP11816784U JP11816784U JPS6047379U JP S6047379 U JPS6047379 U JP S6047379U JP 11816784 U JP11816784 U JP 11816784U JP 11816784 U JP11816784 U JP 11816784U JP S6047379 U JPS6047379 U JP S6047379U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- signal detection
- terminal equipment
- input terminal
- signal
- 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
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
図面は本考案の説明に供するもので、第１図は従来の端
末装置からのオン・オフ信号検出回路の構成図、第２図
は第１図に示す回路の動作を説明するためのタイムチャ
ート、第３図は本考案の一実施例を示す、端末装置から
のオン・オフ信号検出回路の構成図、第４図は第３図に
示す回路の動作を説明するためのタイムチャートである
。
Ｚ、、ｚ２．ｚｓｔ Ｚ４”−”イアピーダンス、Ｒ３
・・・・・・フックスイッチ、Ｄｓ、Ｄｉ・・・・・・
リレー接点、Ｒｕｔ Ｒ２？ Ｒ３？ Ｒ４９Ｒ５−・
・・・・抵抗、Ｃ工９ Ｃａ・・・・・・コンデンサ、
Ｄｌ・・・・・・整流器、Ｔ・・・・・・ハイブリッド
トランス、ＡＭＰ・・・・・・差動増幅器。The drawings serve to explain the present invention, and FIG. 1 is a block diagram of a conventional on/off signal detection circuit from a terminal device, and FIG. 2 is a time chart for explaining the operation of the circuit shown in FIG. 1. 3 is a configuration diagram of an on/off signal detection circuit from a terminal device, showing an embodiment of the present invention, and FIG. 4 is a time chart for explaining the operation of the circuit shown in FIG. 3. Z,,z2. zst Z4”-” ear apedance, R3
...Hook switch, Ds, Di...
Relay contact, Rut R2? R3? R49R5-・
... Resistor, C engineering 9 Ca ... Capacitor,
Dl... Rectifier, T... Hybrid transformer, AMP... Differential amplifier.
Claims (1)
端末装置からのオン・オフ信号に対応して電位変化を発
生する信号線を接続した差動増幅器と、前記差動増幅器
の内入力端子間に接続し前記信号線を接続した前記他方
の入力端子における基準電圧以下の電位をクランプする
整流器とを有することを特徴とする端末装置からのオン
・オフ信号検出回路。A differential amplifier in which a reference voltage source is connected to one input terminal and a signal line that generates a potential change in response to an on/off signal from a terminal device is connected to the other input terminal; and an input of the differential amplifier. An on/off signal detection circuit from a terminal device, comprising a rectifier connected between the terminals and clamping a potential lower than a reference voltage at the other input terminal to which the signal line is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11816784U JPS6047379U (en) | 1984-07-31 | 1984-07-31 | On/off signal detection circuit from terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11816784U JPS6047379U (en) | 1984-07-31 | 1984-07-31 | On/off signal detection circuit from terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6047379U true JPS6047379U (en) | 1985-04-03 |
Family
ID=30271722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11816784U Pending JPS6047379U (en) | 1984-07-31 | 1984-07-31 | On/off signal detection circuit from terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6047379U (en) |
-
1984
- 1984-07-31 JP JP11816784U patent/JPS6047379U/en active Pending
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