JPS609356U - Ringing signal detection circuit - Google Patents
Ringing signal detection circuitInfo
- Publication number
- JPS609356U JPS609356U JP10013483U JP10013483U JPS609356U JP S609356 U JPS609356 U JP S609356U JP 10013483 U JP10013483 U JP 10013483U JP 10013483 U JP10013483 U JP 10013483U JP S609356 U JPS609356 U JP S609356U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal detection
- detection circuit
- ringing signal
- 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
- 238000001514 detection method Methods 0.000 title claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 claims 1
- 230000010354 integration Effects 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
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図は従来の呼出信号検出回路を示す図、第２図は本
考案の一実施例の回路図、第３図は第２、 図の回路
の動作波形図である。
５１．５２・・・・・・電話回線入力端子、Ｒ５３・・
・・・・電流制限用抵抗、５４・・・・・・フォトカプ
ラ、６１゜６２・・・・・・双方向定電圧素子、５７・
・・・・・論理回路、・ ５８・・・・・・積分回路
、５９・・・・・・シュミット回路。FIG. 1 is a diagram showing a conventional calling signal detection circuit, FIG. 2 is a circuit diagram of an embodiment of the present invention, and FIG. 3 is an operational waveform diagram of the circuit shown in FIG. 51.52...Telephone line input terminal, R53...
... Current limiting resistor, 54... Photocoupler, 61°62... Bidirectional constant voltage element, 57.
...Logic circuit, 58...Integrator circuit, 59...Schmitt circuit.
Claims (1)
続したものと、直流阻止用のコンデンサと、電流制限用
の抵抗と、電圧制限用の双方向定電圧素子とを電話回線
に対してそれぞれ直列接続し、上記２個のフォトカプラ
の各フォトトランジスタの出力の論理和をとる論理回路
と、この論理回路の出力を所定の立上り時間と立下り時
間とで積分する積分回路と、この積分回路の出力を波形
整形する回路とを備えたことを特徴とする呼出信号検出
回路。Two photocoupler light-emitting diodes connected in parallel in opposite directions, a capacitor for direct current blocking, a resistor for current limiting, and a bidirectional constant voltage element for voltage limiting are connected in series to the telephone line. a logic circuit that connects the outputs of each phototransistor of the two photocouplers, an integration circuit that integrates the output of this logic circuit over a predetermined rise time and fall time; A calling signal detection circuit comprising: a circuit for waveform shaping an output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10013483U JPS609356U (en) | 1983-06-30 | 1983-06-30 | Ringing signal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10013483U JPS609356U (en) | 1983-06-30 | 1983-06-30 | Ringing signal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS609356U true JPS609356U (en) | 1985-01-22 |
Family
ID=30237013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10013483U Pending JPS609356U (en) | 1983-06-30 | 1983-06-30 | Ringing signal detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609356U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03274947A (en) * | 1990-03-26 | 1991-12-05 | Kanda Tsushin Kogyo Co Ltd | Incoming call detection circuit |
| JPH04113689U (en) * | 1991-03-20 | 1992-10-05 | ヤマハ株式会社 | Soundproof sliding door device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55109095A (en) * | 1979-02-14 | 1980-08-21 | Nec Corp | Call signal detection system |
| JPS56109095A (en) * | 1980-02-01 | 1981-08-29 | Nippon Gakki Seizo Kk | Diaphragm plate for audio equipment |
| JPS56115062A (en) * | 1980-02-15 | 1981-09-10 | Tamura Electric Works Ltd | Telephone hook-off and call signal detecting circuit |
-
1983
- 1983-06-30 JP JP10013483U patent/JPS609356U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55109095A (en) * | 1979-02-14 | 1980-08-21 | Nec Corp | Call signal detection system |
| JPS56109095A (en) * | 1980-02-01 | 1981-08-29 | Nippon Gakki Seizo Kk | Diaphragm plate for audio equipment |
| JPS56115062A (en) * | 1980-02-15 | 1981-09-10 | Tamura Electric Works Ltd | Telephone hook-off and call signal detecting circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03274947A (en) * | 1990-03-26 | 1991-12-05 | Kanda Tsushin Kogyo Co Ltd | Incoming call detection circuit |
| JPH04113689U (en) * | 1991-03-20 | 1992-10-05 | ヤマハ株式会社 | Soundproof sliding door device |
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