JPS53106506A - Power supply circuit for subscriber's telephone set - Google Patents

Power supply circuit for subscriber's telephone set

Info

Publication number
JPS53106506A
JPS53106506A JP2125077A JP2125077A JPS53106506A JP S53106506 A JPS53106506 A JP S53106506A JP 2125077 A JP2125077 A JP 2125077A JP 2125077 A JP2125077 A JP 2125077A JP S53106506 A JPS53106506 A JP S53106506A
Authority
JP
Japan
Prior art keywords
subscriber
power supply
supply circuit
telephone set
transformer
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
JP2125077A
Other languages
Japanese (ja)
Other versions
JPS5949749B2 (en
Inventor
Osamu Enomoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP52021250A priority Critical patent/JPS5949749B2/en
Publication of JPS53106506A publication Critical patent/JPS53106506A/en
Publication of JPS5949749B2 publication Critical patent/JPS5949749B2/en
Expired 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
    • H04M19/003—Arrangements for compensation of the DC flux in line transformers

Abstract

PURPOSE:To make the set small in size and economize the set, by reducing the current in the transformer windings and eliminating the adverse effect due to DC excitation of core, through the provision of the constant current sources having different capacity at the telephone side of transformer.
JP52021250A 1977-02-28 1977-02-28 Power supply circuit for subscriber's telephone Expired JPS5949749B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52021250A JPS5949749B2 (en) 1977-02-28 1977-02-28 Power supply circuit for subscriber's telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52021250A JPS5949749B2 (en) 1977-02-28 1977-02-28 Power supply circuit for subscriber's telephone

Publications (2)

Publication Number Publication Date
JPS53106506A true JPS53106506A (en) 1978-09-16
JPS5949749B2 JPS5949749B2 (en) 1984-12-04

Family

ID=12049811

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52021250A Expired JPS5949749B2 (en) 1977-02-28 1977-02-28 Power supply circuit for subscriber's telephone

Country Status (1)

Country Link
JP (1) JPS5949749B2 (en)

Also Published As

Publication number Publication date
JPS5949749B2 (en) 1984-12-04

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