JPS56120252A - Current supply circuit - Google Patents

Current supply circuit

Info

Publication number
JPS56120252A
JPS56120252A JP2275580A JP2275580A JPS56120252A JP S56120252 A JPS56120252 A JP S56120252A JP 2275580 A JP2275580 A JP 2275580A JP 2275580 A JP2275580 A JP 2275580A JP S56120252 A JPS56120252 A JP S56120252A
Authority
JP
Japan
Prior art keywords
voltage
transistor
duty
capacitor
controlling
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
JP2275580A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0247765B2 (enrdf_load_html_response
Inventor
Hirotoshi Shirasu
Kunio Imai
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2275580A priority Critical patent/JPS56120252A/ja
Publication of JPS56120252A publication Critical patent/JPS56120252A/ja
Publication of JPH0247765B2 publication Critical patent/JPH0247765B2/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
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/008—Using DC/DC converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP2275580A 1980-02-27 1980-02-27 Current supply circuit Granted JPS56120252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2275580A JPS56120252A (en) 1980-02-27 1980-02-27 Current supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2275580A JPS56120252A (en) 1980-02-27 1980-02-27 Current supply circuit

Publications (2)

Publication Number Publication Date
JPS56120252A true JPS56120252A (en) 1981-09-21
JPH0247765B2 JPH0247765B2 (enrdf_load_html_response) 1990-10-22

Family

ID=12091495

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2275580A Granted JPS56120252A (en) 1980-02-27 1980-02-27 Current supply circuit

Country Status (1)

Country Link
JP (1) JPS56120252A (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH056671U (ja) * 1991-07-12 1993-01-29 東芝硝子株式会社 反射形ランプ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828922A (enrdf_load_html_response) * 1971-08-19 1973-04-17
JPS54114714A (en) * 1978-02-27 1979-09-07 Yuasa Battery Co Ltd Dc power device
JPS556659A (en) * 1978-06-30 1980-01-18 Toshiba Corp Constant-current circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828922A (enrdf_load_html_response) * 1971-08-19 1973-04-17
JPS54114714A (en) * 1978-02-27 1979-09-07 Yuasa Battery Co Ltd Dc power device
JPS556659A (en) * 1978-06-30 1980-01-18 Toshiba Corp Constant-current circuit

Also Published As

Publication number Publication date
JPH0247765B2 (enrdf_load_html_response) 1990-10-22

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