JPH02260893A - Ringer detection circuit - Google Patents
Ringer detection circuitInfo
- Publication number
- JPH02260893A JPH02260893A JP7857289A JP7857289A JPH02260893A JP H02260893 A JPH02260893 A JP H02260893A JP 7857289 A JP7857289 A JP 7857289A JP 7857289 A JP7857289 A JP 7857289A JP H02260893 A JPH02260893 A JP H02260893A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- ringer
- impedance
- detection
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000009499 grossing Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 230000005236 sound signal Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、アナログ交換機に接続される加入者線搬送装
置に関し、特に直流に重畳されたリンガ−（Ｒｌｎｇｅ
ｒ）の検出に用いられるリンガ−（Ｒｌｎｇｅｒ）検出
回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to subscriber line carrier equipment connected to an analog switchboard, and in particular to a ringer (Rlnge
The present invention relates to a Ringer detection circuit used for detecting r).
［従来の技術］
従来、この種のＲ１ｎｇｅｔ検出回路は、アナログ交換
機からの２線加入者線路（２Ｗ）のチップ（Ｔｌｐ）線
側に接続された直流遮断回路、２Ｗのリング（Ｒｌｎｇ
）線側に接続された非線形回路、これら直流遮断回路及
び非線形回路に接続された低域ろ波器、この低域ろ波器
に接続された全波整流回路、全波整流回路に接続された
検出回路、及び検出回路に接続されたレベルコンバータ
を備えている。[Prior Art] Conventionally, this type of R1nget detection circuit has a DC cutoff circuit connected to the tip (Tlp) line side of a 2-wire subscriber line (2W) from an analog exchange, a 2W ring (Rlng)
) A nonlinear circuit connected to the line side, a low-pass filter connected to these DC cutoff circuits and the nonlinear circuit, a full-wave rectifier circuit connected to this low-pass filter, and a full-wave rectifier circuit connected to the full-wave rectifier circuit. It includes a detection circuit and a level converter connected to the detection circuit.
ところで、直流遮断回路は、Ｔｉｐ線に加わるＲ１ｎｇ
ｅｔ信号に重畳されている直流成分を遮断し、非線形回
路は所定（一定）のインピーダンスを有している。By the way, the DC cutoff circuit has R1ng applied to the Tip wire.
The DC component superimposed on the et signal is blocked, and the nonlinear circuit has a predetermined (constant) impedance.
直流遮断回路及び非線形回路の出力は低域ろ波器に与え
られ、ここでＲ１ｎｇｅｔ周波数より高い成分が遮断さ
れて、ろ波信号として出力される。このろ波信号は全波
整流回路で全波整流され、検出回路で予め設定されたし
きい値と比較され、検出回路は全波整流出力〉しきい値
の場合にパルス出力を送出する。このパルス出力はレベ
ルコンバータでＴＴＬレベルに変換される。The outputs of the DC cutoff circuit and the nonlinear circuit are given to a low-pass filter, where components higher than the R1nget frequency are cut off and output as a filtered signal. This filtered signal is full-wave rectified by a full-wave rectifier circuit, and compared with a preset threshold value by a detection circuit, and the detection circuit sends out a pulse output when full-wave rectification output>threshold value. This pulse output is converted to TTL level by a level converter.
［発明が解決しようとする課８］
ところで、従来のＲ１ｎｇｅｔ検出回路では％６０Ｈ２
に対する誘導誤検出耐力が弱く、また音声信号に対する
インピーダンスが一定でしかも低いため誘導誤検出が生
じやすく、シかも所謂リターンロス（Ｒｅｔｕｒｎ Ｌ
ｏｓｓ ）が低下してしまうという問題点がある。[Issue 8 to be solved by the invention] By the way, in the conventional R1nget detection circuit, %60H2
In addition, since the impedance to audio signals is constant and low, erroneous induction detection is likely to occur, and the so-called return loss (Return L) is likely to occur.
There is a problem that oss ) is reduced.
（課題を解決するための手段）
本発明によれば、アナログ交換機に接続された加入者線
搬送装置に用いられ、該アナログ交換機からのリンガ−
を検出するリンガ−検出回路において、アナログ交換機
のチップ線側に接続され、直流成分を遮断するための直
流遮断回路と、前記アナログ交換機のリング線側に接続
され、音声信号に対しては高インピーダンスとなり、リ
ンガ−信号に対しては低インピーダンスとなるインピー
ダンス手段を備える非線形回路と、前記直流遮断回路及
び前記非線形回路に接続され、リンガ−周波数より高い
成分の信号を遮断して、ろ波信号を出力する低域ろ波器
と、該ろ波信号を整流して整流信号を出力する全波整流
回路と、該整流信号を所定のしきい値と比較して、検出
信号を出力する検出回路と、該検出信号を平滑して、平
滑信号を出力する平滑回路と、該平滑信号を予め定めら
れたレベルにして出力するレベルコンバータとを有すこ
とを特徴とするリンガ−検出回路が得られる。(Means for Solving the Problems) According to the present invention, a subscriber line carrier device connected to an analog exchange is used, and a ringer from the analog exchange is connected to a subscriber line carrier.
In the ringer detection circuit that detects the signal, there is a DC cutoff circuit that is connected to the chip line side of the analog exchange and cuts off the DC component, and a high impedance circuit that is connected to the ring line side of the analog exchange and has a high impedance for voice signals. A nonlinear circuit is connected to the DC cutoff circuit and the nonlinear circuit, and is connected to the nonlinear circuit having an impedance means that has a low impedance for the ringer signal, and blocks signals with components higher than the ringer frequency to generate a filtered signal. a low-pass filter for outputting, a full-wave rectifier circuit for rectifying the filtered signal and outputting a rectified signal, and a detection circuit for comparing the rectified signal with a predetermined threshold and outputting a detection signal. , a ringer detection circuit is obtained which is characterized by having a smoothing circuit that smoothes the detection signal and outputs the smoothed signal, and a level converter that outputs the smoothed signal at a predetermined level.
（実施例） 次に本発明について実施例によって説明する。(Example) Next, the present invention will be explained with reference to examples.
第１図を参照して、アナログ交換機のｒｔｐ線は直流遮
断回路１に接続され、Ｒ１１ｇ線は非線形回路２に接続
される。そして、直流遮断回路１の出力１１及び非線形
回路２の出力２１は低域ろ波器３に与えられる。Referring to FIG. 1, the RTP line of the analog exchange is connected to a DC cutoff circuit 1, and the R11g line is connected to a nonlinear circuit 2. Then, the output 11 of the DC cutoff circuit 1 and the output 21 of the nonlinear circuit 2 are given to the low-pass filter 3.
直流遮断器１は、アナログ交換機のＴｉｐ側より加わる
Ｒ１ｎｇｅｒ信号に重畳された直流成分を遮断する。低
域ろ波器３は直流遮断器１からの出力を受け、Ｒ１ｎｇ
ｅｒ周波数より高い周波数成分を減衰させる。The DC breaker 1 blocks the DC component superimposed on the R1nger signal applied from the Tip side of the analog exchange. The low-pass filter 3 receives the output from the DC breaker 1, and R1ng
Attenuates frequency components higher than the er frequency.
一方、非線形回路２は、後述するように小振幅信号（音
声）に対してインピーダンスが大きくなり、ｇｔｎｇｅ
ｔ信号に対してインピーダンスが小さくなる。この結果
、音声特性が向上する。On the other hand, the nonlinear circuit 2 has a large impedance with respect to a small amplitude signal (voice), as will be described later.
The impedance becomes smaller with respect to the t signal. As a result, the audio characteristics are improved.
低域ろ波器３の出力３１は全波整流器４で整流され、検
出回路４で、Ｒ１ｎｇｅｒ信号の有無が検出される。つ
まり、予め設定されたしきい値と比較されて、このしき
い値より高い場合、検出出力を送出する。この検出回路
はツェナーダイオードとフォトカブラと備えておりこれ
によって、電源系を分離する機能を備えている。この検
出出力５１は平滑回路６で平滑され、平滑回路６の出力
６１はレベルコンバータ７でＴＴＬレベルの信号とされ
て出力される。なお、平滑回路は予め定められた時間未
満のパルスを吸収している。The output 31 of the low-pass filter 3 is rectified by a full-wave rectifier 4, and the detection circuit 4 detects the presence or absence of the R1nger signal. That is, it is compared with a preset threshold, and if it is higher than this threshold, a detection output is sent out. This detection circuit is equipped with a Zener diode and a photocoupler, and has the function of separating the power supply system. This detection output 51 is smoothed by a smoothing circuit 6, and an output 61 of the smoothing circuit 6 is converted into a TTL level signal by a level converter 7 and output. Note that the smoothing circuit absorbs pulses shorter than a predetermined time.
ここで、第２図を参照して、非線形回路２の素子構成に
ついて説明する。Here, the element configuration of the nonlinear circuit 2 will be explained with reference to FIG. 2.
非線形回路２は一対のツェナーダイオード２ａ及び２ｂ
を備えており、ツェナーダイオード２ａの陽極（アノー
ド）がツェナーダイオード２ｂのアノードに連結されて
いる。そして、ツェナーダイオード２ａがＲ１ｎｇ側（
Ｒ１１ｇ線）に接続され、ツェナーダイオード２ｂが低
域ろ波器３に接続されている。The nonlinear circuit 2 includes a pair of Zener diodes 2a and 2b.
The anode of the Zener diode 2a is connected to the anode of the Zener diode 2b. Then, the Zener diode 2a is connected to the R1ng side (
R11g line), and the Zener diode 2b is connected to the low-pass filter 3.
ところで、アナログ交換機からの音声信号の最大振幅は
一般に５ ｖｒｓｓであり、Ｒ１ｎｇｅｔ信号の最小振
幅は６５ ｖｒｍｓである。このことから、一対のツェ
ナーダイオード２＠及び２ｂで構成される非線形素子の
ブレークダウン電圧を５ ｖｒｔｓｓを越え、６５ ｖ
ｒｍｓ未満の間に設定することにより音声信号の最大振
幅まではインビニダンスが大きくなり、Ｒ１ｎｇｅｔ信
号に対してはインピーダンスが小さくなるようにするこ
とができる。By the way, the maximum amplitude of the voice signal from the analog switch is generally 5 vrss, and the minimum amplitude of the R1nget signal is 65 vrms. From this, the breakdown voltage of the nonlinear element consisting of a pair of Zener diodes 2@ and 2b exceeds 5 vrtss and becomes 65 vrtss.
By setting it to a value less than rms, the invinidance becomes large up to the maximum amplitude of the audio signal, and the impedance becomes small for the R1nget signal.
Ｃ発明の効果］
以上説明したように本発明では、低域ろ波器と非線形回
路を用い、非線形回路が音声信号に対しては高インピー
ダンスとなり、Ｒ１ｎｇｅｒ信号に対しては低インピー
ダンスとなるようにしたから、６０Ｈｚの誘導誤検出が
防止でき、さらにＲｅｔｕｒｎ ＬｏｓＳの低下を防ぐ
ことができる効果がある。C Effect of the invention] As explained above, in the present invention, a low-pass filter and a nonlinear circuit are used, and the nonlinear circuit has a high impedance for the audio signal and a low impedance for the R1nger signal. Therefore, it is possible to prevent erroneous detection of induction at 60 Hz, and furthermore, it is possible to prevent a decrease in Return LosS.
第１図は、本発明によるＲｔｎｇｅｒ検出回路の一実施
例を示すブロック図、第２図は第１図に示す非線形回路
の一例を示す図である。
１・・・直流遮断回路、２・・・非線形回路、３・・・
低域ろ波器、４・・・全波整流回路、５・・・検出回路
、６・・・平滑回路、７・・・レベルコンバータ。FIG. 1 is a block diagram showing an embodiment of the Rtnger detection circuit according to the present invention, and FIG. 2 is a diagram showing an example of the nonlinear circuit shown in FIG. 1. 1... DC cutoff circuit, 2... Nonlinear circuit, 3...
Low-pass filter, 4... Full wave rectifier circuit, 5... Detection circuit, 6... Smoothing circuit, 7... Level converter.
Claims (1)
いられ、該アナログ交換機からのリンガーを検出するリ
ンガー検出回路において、アナログ交換機のチップ線側
に接続され、直流成分を遮断するための直流遮断回路と
、前記アナログ交換機のリング線側に接続され、音声信
号に対しては高インピーダンスとなり、リンガー信号に
対しては低インピーダンスとなるインピーダンス手段を
備える非線形回路と、前記直流遮断回路及び前記非線形
回路に接続され、リンガー周波数より高い成分の信号を
遮断して、ろ波信号を出力する低域ろ波器と、該ろ波信
号を整流して整流信号を出力する全波整流回路と、該整
流信号を所定のしきい値と比較して、検出信号を出力す
る検出回路と、該検出信号を平滑して、平滑信号を出力
する平滑回路と、該平滑信号を予め定められたレベルに
して出力するレベルコンバータとを有すことを特徴とす
るリンガー検出回路。1. In a ringer detection circuit that is used in a subscriber line carrier device connected to an analog exchange and detects a ringer from the analog exchange, a DC cutoff is connected to the chip line side of the analog exchange and is used to cut off the DC component. a nonlinear circuit that is connected to the ring line side of the analog exchange and includes impedance means that has high impedance for voice signals and low impedance for ringer signals, the DC cutoff circuit, and the nonlinear circuit. a low-pass filter connected to the filter, which cuts off signals with components higher than the ringer frequency and outputs a filtered signal; a full-wave rectifier circuit which rectifies the filtered signal and outputs a rectified signal; A detection circuit that compares a signal with a predetermined threshold value and outputs a detection signal, a smoothing circuit that smoothes the detection signal and outputs a smoothed signal, and outputs the smoothed signal at a predetermined level. A ringer detection circuit comprising a level converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1078572A JP2972221B2 (en) | 1989-03-31 | 1989-03-31 | Ringer detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1078572A JP2972221B2 (en) | 1989-03-31 | 1989-03-31 | Ringer detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02260893A true JPH02260893A (en) | 1990-10-23 |
| JP2972221B2 JP2972221B2 (en) | 1999-11-08 |
Family
ID=13665617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1078572A Expired - Lifetime JP2972221B2 (en) | 1989-03-31 | 1989-03-31 | Ringer detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2972221B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0344287A (en) * | 1989-07-12 | 1991-02-26 | Fujitsu Ltd | Ringer signal detection circuit |
| EP1253075A1 (en) | 1995-12-12 | 2002-10-30 | Honda Giken Kogyo Kabushiki Kaisha | Engine exhaust emission control system in outboard engine system |
-
1989
- 1989-03-31 JP JP1078572A patent/JP2972221B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0344287A (en) * | 1989-07-12 | 1991-02-26 | Fujitsu Ltd | Ringer signal detection circuit |
| EP1253075A1 (en) | 1995-12-12 | 2002-10-30 | Honda Giken Kogyo Kabushiki Kaisha | Engine exhaust emission control system in outboard engine system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2972221B2 (en) | 1999-11-08 |
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