JPS59105742A - 呼出信号検出回路 - Google Patents

呼出信号検出回路

Info

Publication number
JPS59105742A
JPS59105742A JP21570682A JP21570682A JPS59105742A JP S59105742 A JPS59105742 A JP S59105742A JP 21570682 A JP21570682 A JP 21570682A JP 21570682 A JP21570682 A JP 21570682A JP S59105742 A JPS59105742 A JP S59105742A
Authority
JP
Japan
Prior art keywords
circuit
signal
voltage
detection
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.)
Granted
Application number
JP21570682A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0432580B2 (enrdf_load_stackoverflow
Inventor
Koichi Ito
公一 伊藤
Akio Goto
後藤　昭夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP21570682A priority Critical patent/JPS59105742A/ja
Publication of JPS59105742A publication Critical patent/JPS59105742A/ja
Publication of JPH0432580B2 publication Critical patent/JPH0432580B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
JP21570682A 1982-12-09 1982-12-09 呼出信号検出回路 Granted JPS59105742A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21570682A JPS59105742A (ja) 1982-12-09 1982-12-09 呼出信号検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21570682A JPS59105742A (ja) 1982-12-09 1982-12-09 呼出信号検出回路

Publications (2)

Publication Number Publication Date
JPS59105742A true JPS59105742A (ja) 1984-06-19
JPH0432580B2 JPH0432580B2 (enrdf_load_stackoverflow) 1992-05-29

Family

ID=16676808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21570682A Granted JPS59105742A (ja) 1982-12-09 1982-12-09 呼出信号検出回路

Country Status (1)

Country Link
JP (1) JPS59105742A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178851A (ja) * 1983-03-30 1984-10-11 Toshiba Corp 電話機回路
JPH03211946A (ja) * 1990-01-16 1991-09-17 Tenshiyou Denki Kogyo Kk 端末設備呼出信号の検出方法
JP2007012608A (ja) * 2005-07-01 2007-01-18 Senstronic 誘導性存在、近接、または位置センサ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57129563A (en) * 1981-02-04 1982-08-11 Ricoh Co Ltd Call signal detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57129563A (en) * 1981-02-04 1982-08-11 Ricoh Co Ltd Call signal detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178851A (ja) * 1983-03-30 1984-10-11 Toshiba Corp 電話機回路
JPH03211946A (ja) * 1990-01-16 1991-09-17 Tenshiyou Denki Kogyo Kk 端末設備呼出信号の検出方法
JP2007012608A (ja) * 2005-07-01 2007-01-18 Senstronic 誘導性存在、近接、または位置センサ

Also Published As

Publication number Publication date
JPH0432580B2 (enrdf_load_stackoverflow) 1992-05-29

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