JPS58149849U

JPS58149849U - Ringer signal detection device

Info

Publication number: JPS58149849U
Application number: JP4488382U
Authority: JP
Inventors: 勝成佐々木
Original assignee: 株式会社東芝
Priority date: 1982-03-31
Filing date: 1982-03-31
Publication date: 1983-10-07

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は、従来のリンガ信号検出装置の一例を示した回
路図、第２図ａは正弦状リンが信号の波形図、同図す、
　　ｃおよびｄは同図ａのリンガ信号が印加された場合
における第１図の装置の作用を示した波形図、第３図ａ
は妬形状リンガ信号の波形図、同図す、　　ｃおよびｄ
は上記矩形状リンガ信号が印加された場合における第１
図の装置の作用を示した波形図、第４図ａは高周波信号
が重畳されたリンガ信号を示す波形図、同図すは同図ａ
に示すリンガ信号が第１図に示した装置に印加されたさ
いにおける同装置の作用を示した波形図、第５図は本考
案に係るリンガ信号検出装置の一実施例を示した回路図
である。１・・・・・・電話回線、２・・・・・・フォトカプラ
、３・・・・・・周波数判定回路、６，７・・・・・・
微分回路、８・・・・・・オア回路、９・・・・・・単
安定マルチバイブレータ。FIG. 1 is a circuit diagram showing an example of a conventional ringer signal detection device, and FIG. 2a is a waveform diagram of a sinusoidal ringer signal.
c and d are waveform diagrams showing the operation of the device in Fig. 1 when the ringer signal in Fig. 3a is applied; Fig. 3a
are the waveform diagrams of the waveform ringer signal, c and d.
is the first when the above rectangular ringer signal is applied.
Figure 4a is a waveform diagram showing the operation of the device shown in Figure 4. Figure 4a is a waveform diagram showing a ringer signal on which a high frequency signal is superimposed.
FIG. 5 is a waveform diagram showing the operation of the device shown in FIG. 1 when the ringer signal shown in FIG. be. 1...Telephone line, 2...Photocoupler, 3...Frequency determination circuit, 6, 7...
Differential circuit, 8...OR circuit, 9...monostable multivibrator.

Claims

[Scope of utility model registration request]

first and second signal detection means each detecting a positive half-wave and a negative half-wave of the phosphorus signal applied to the telephone line;
first and second differentiating circuits for differentiating the output signals of these signal detecting means, a circuit for ORing the output signals of these differentiating circuits, and a circuit that is triggered by the output signal of the OR circuit to generate the output signal. A ringer signal detection device comprising: a monostable multivibrator that outputs a signal with a time width shorter than the cycle of the ringer signal, and detects the ringer signal based on the output signal of the monostable multivibrator.