JPS6232656U - - Google Patents
Info
- Publication number
- JPS6232656U JPS6232656U JP12378985U JP12378985U JPS6232656U JP S6232656 U JPS6232656 U JP S6232656U JP 12378985 U JP12378985 U JP 12378985U JP 12378985 U JP12378985 U JP 12378985U JP S6232656 U JPS6232656 U JP S6232656U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- rectifier circuit
- transistor
- telephone
- telephone line
- 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
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000004069 differentiation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Description
第１図は本考案に係るリング吸収回路を具備す
る電話機と電話回線を使用するシステムの構成を
示すブロツク図、第２図は第１図の電話機１の端
子Ａ及び付属装置２の端子Ｂの電圧波形を示すタ
イミングチヤート、第３図は電話機と付属装置を
接続してなる従来のシステムの構成を示すブロツ
ク図、第４図は第３図の電話機１の端子Ａと付属
装置２の端子Ｂの電圧波形を示すタイミングチヤ
ートである。
図中、１……電話機、２……付属装置、３……
交換機、４……電話回線、５０……リング吸収回
路、５１……整流回路、５２，５３，５４……抵
抗器、５５……コンデンサ、５６……トランジス
タ。
FIG. 1 is a block diagram showing the configuration of a system using a telephone equipped with a ring absorption circuit according to the present invention and a telephone line, and FIG. A timing chart showing voltage waveforms, Fig. 3 is a block diagram showing the configuration of a conventional system that connects a telephone and an attached device, and Fig. 4 shows terminal A of telephone 1 and terminal B of attached device 2 in Fig. 3. This is a timing chart showing the voltage waveform of . In the figure, 1...telephone, 2...attached device, 3...
Switchboard, 4... Telephone line, 50... Ring absorption circuit, 51... Rectifier circuit, 52, 53, 54... Resistor, 55... Capacitor, 56... Transistor.
Claims (1)
、前記電話回線に接続される整流回路と、該整流
回路の直流出力部に接続される微分回路と、その
微分回路の出力にベースが接続されるトランジス
タとを具備し、該トランジスタのエミツタとコレ
クタを前記整流回路の前記直流出力部に接続し、
該整流回路の直流電圧が増加したときに前記微分
回路により、前記トランジスタをオンさせること
を特徴とするリング吸収回路。 In a system using a telephone and a telephone line, a rectifier circuit connected to the telephone line, a differentiator circuit connected to a DC output part of the rectifier circuit, and a transistor whose base is connected to the output of the differentiator circuit. connecting the emitter and collector of the transistor to the DC output section of the rectifier circuit;
A ring absorption circuit characterized in that the transistor is turned on by the differentiation circuit when the DC voltage of the rectifier circuit increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12378985U JPS6232656U (en) | 1985-08-12 | 1985-08-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12378985U JPS6232656U (en) | 1985-08-12 | 1985-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6232656U true JPS6232656U (en) | 1987-02-26 |
Family
ID=31015213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12378985U Pending JPS6232656U (en) | 1985-08-12 | 1985-08-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6232656U (en) |
-
1985
- 1985-08-12 JP JP12378985U patent/JPS6232656U/ja active Pending