CA1132735A - Three-terminal power supply circuit for telephone set - Google Patents

Three-terminal power supply circuit for telephone set

Info

Publication number
CA1132735A
CA1132735A CA346,828A CA346828A CA1132735A CA 1132735 A CA1132735 A CA 1132735A CA 346828 A CA346828 A CA 346828A CA 1132735 A CA1132735 A CA 1132735A
Authority
CA
Canada
Prior art keywords
circuit
terminal
voltage
transistor
power supply
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.)
Expired
Application number
CA346,828A
Other languages
English (en)
French (fr)
Inventor
Makoto Yoshitoshi
Tatsuhiro Naganawa
Kunihiro Kato
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Application granted granted Critical
Publication of CA1132735A publication Critical patent/CA1132735A/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
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Protection Of Static Devices (AREA)
CA346,828A 1979-07-03 1980-03-03 Three-terminal power supply circuit for telephone set Expired CA1132735A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP54083438A JPS596549B2 (ja) 1979-07-03 1979-07-03 電話機用３端子電源回路
JP83438/79 1979-07-03

Publications (1)

Publication Number Publication Date
CA1132735A true CA1132735A (en) 1982-09-28

Family

ID=13802427

Family Applications (1)

Application Number Title Priority Date Filing Date
CA346,828A Expired CA1132735A (en) 1979-07-03 1980-03-03 Three-terminal power supply circuit for telephone set

Country Status (8)

Country Link
US (1) US4319094A (enExample)
JP (1) JPS596549B2 (enExample)
CA (1) CA1132735A (enExample)
DE (1) DE3008259C2 (enExample)
DK (1) DK155068C (enExample)
FR (1) FR2460576A1 (enExample)
GB (1) GB2052213B (enExample)
SE (1) SE450070B (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500691A1 (fr) * 1981-02-23 1982-08-27 Pays Gerard Cellule d'alimentation electrique a redressement et regulation, notamment pour sonneries electroniques
DE3238416A1 (de) * 1982-10-16 1984-04-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zum speisen einer eine konstante betriebsspannung liefernden stromversorgungseinrichtung
FR2549667B1 (fr) * 1983-07-22 1985-10-04 Thomson Csf Circuit d'alimentation regulee notamment pour poste telephonique
DE3334988A1 (de) * 1983-09-24 1985-04-18 Elmeg Elektro-Mechanik Gmbh, 3150 Peine Schaltungsanordnung zur speisung von fernsprecheinrichtungen aus der leitung
US5125077A (en) * 1983-11-02 1992-06-23 Microsoft Corporation Method of formatting data from a mouse
JPS6328995U (enExample) * 1986-08-11 1988-02-25
SE455749B (sv) * 1986-12-09 1988-08-01 Ericsson Telefon Ab L M Anordning vid en hogtalareforsedd telefonapparat for att effektforsorja en till hogtalaren ansluten hogtalareforsterkare
DE3826765A1 (de) * 1988-08-04 1990-02-08 Deutsche Telephonwerk Kabel Schaltungsanordnung zur speisung elektronischer komponenten in kommunikations-endgeraeten ueber die anschlussleitungen
JPH0537603U (ja) * 1991-10-31 1993-05-21 マルヤス工業株式会社 燃料配管用プロテクター
JP5015442B2 (ja) * 2005-10-11 2012-08-29 ローム株式会社 電流検出回路およびそれを用いた受光装置ならびに電子機器
US8134106B2 (en) 2005-10-11 2012-03-13 Rohm Co., Ltd. Current detection circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495645B1 (enExample) * 1970-02-07 1974-02-08
CA930488A (en) * 1971-08-27 1973-07-17 C. J. Cowpland Michael Power supply
CH592392A5 (en) * 1975-09-30 1977-10-31 Sodeco Compteurs De Geneve Telephone circuit without inductances - couples microphone amplifiers output to subscriber line and consists of DC feedback transistor in series with Zener diode

Also Published As

Publication number Publication date
DK155068C (da) 1989-07-03
FR2460576B1 (enExample) 1984-11-30
GB2052213B (en) 1983-07-27
GB2052213A (en) 1981-01-21
SE8001541L (sv) 1981-01-04
DK155068B (da) 1989-01-30
DE3008259A1 (de) 1981-01-08
FR2460576A1 (fr) 1981-01-23
SE450070B (sv) 1987-06-01
DE3008259C2 (de) 1982-10-21
US4319094A (en) 1982-03-09
JPS596549B2 (ja) 1984-02-13
JPS568956A (en) 1981-01-29
DK91480A (da) 1981-01-04

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Legal Events

Date Code Title Description
MKEX Expiry