JPS5838058A - 電話機のための給電回路 - Google Patents

電話機のための給電回路

Info

Publication number
JPS5838058A
JPS5838058A JP56135213A JP13521381A JPS5838058A JP S5838058 A JPS5838058 A JP S5838058A JP 56135213 A JP56135213 A JP 56135213A JP 13521381 A JP13521381 A JP 13521381A JP S5838058 A JPS5838058 A JP S5838058A
Authority
JP
Japan
Prior art keywords
circuit
voltage
power supply
transistor
telephone
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
JP56135213A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0253987B2 (enrdf_load_stackoverflow
Inventor
Takahiro Yokota
横田　恭弘
Minoru Sakata
稔 坂田
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56135213A priority Critical patent/JPS5838058A/ja
Publication of JPS5838058A publication Critical patent/JPS5838058A/ja
Publication of JPH0253987B2 publication Critical patent/JPH0253987B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Mobile Radio Communication Systems (AREA)
JP56135213A 1981-08-28 1981-08-28 電話機のための給電回路 Granted JPS5838058A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56135213A JPS5838058A (ja) 1981-08-28 1981-08-28 電話機のための給電回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56135213A JPS5838058A (ja) 1981-08-28 1981-08-28 電話機のための給電回路

Publications (2)

Publication Number Publication Date
JPS5838058A true JPS5838058A (ja) 1983-03-05
JPH0253987B2 JPH0253987B2 (enrdf_load_stackoverflow) 1990-11-20

Family

ID=15146478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56135213A Granted JPS5838058A (ja) 1981-08-28 1981-08-28 電話機のための給電回路

Country Status (1)

Country Link
JP (1) JPS5838058A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019330A (ja) * 1983-07-13 1985-01-31 Nec Corp 無線電話装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570162A (en) * 1978-11-21 1980-05-27 Fujitsu Ltd Call signal generation system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570162A (en) * 1978-11-21 1980-05-27 Fujitsu Ltd Call signal generation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019330A (ja) * 1983-07-13 1985-01-31 Nec Corp 無線電話装置

Also Published As

Publication number Publication date
JPH0253987B2 (enrdf_load_stackoverflow) 1990-11-20

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