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SE7805643L - Likstromsmatningsdon for telefonapparater - Google Patents

Likstromsmatningsdon for telefonapparater

Info

Publication number
SE7805643L
SE7805643L SE7805643A SE7805643A SE7805643L SE 7805643 L SE7805643 L SE 7805643L SE 7805643 A SE7805643 A SE 7805643A SE 7805643 A SE7805643 A SE 7805643A SE 7805643 L SE7805643 L SE 7805643L
Authority
SE
Sweden
Prior art keywords
diamond
supplies
telephone devices
telephone
devices
Prior art date
Application number
SE7805643A
Other languages
English (en)
Inventor
M L Embree
J F O'neill
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of SE7805643L publication Critical patent/SE7805643L/sv

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Amplifiers (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
SE7805643A 1977-05-25 1978-05-17 Likstromsmatningsdon for telefonapparater SE7805643L (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/800,220 US4087647A (en) 1977-05-25 1977-05-25 Circuit for supplying direct current to telephone station sets

Publications (1)

Publication Number Publication Date
SE7805643L true SE7805643L (sv) 1978-11-26

Family

ID=25177803

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7805643A SE7805643L (sv) 1977-05-25 1978-05-17 Likstromsmatningsdon for telefonapparater

Country Status (7)

Country Link
US (1) US4087647A (sv)
JP (1) JPS5431204A (sv)
CA (1) CA1111587A (sv)
DE (1) DE2822268A1 (sv)
FR (1) FR2392557A1 (sv)
GB (1) GB1602232A (sv)
SE (1) SE7805643L (sv)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA784547B (en) * 1977-08-17 1979-08-29 Post Office Unbalanced/balanced converter circuits
FR2422300A1 (fr) * 1978-04-03 1979-11-02 Trt Telecom Radio Electr Joncteur comportant un amplificateur de puissance symetrique pour alimenter la ligne d'abonne
US4197432A (en) * 1978-06-15 1980-04-08 Gte Automatic Electric Laboratories Incorporated Telephone subscriber's loop power control circuit
NL7807531A (nl) * 1978-07-13 1980-01-15 Philips Nv Inrichting voor het toevoeren van een signaal aan een transmissielijn.
NL7807706A (nl) * 1978-07-19 1980-01-22 Philips Nv Voedingsbrug met d.c.-compensatie voor beide richtin- gen van de voedingstroom.
CA1130940A (en) * 1978-09-22 1982-08-31 Oki Electric Industry Co., Ltd. Current supply circuit for telephone exchange
US4357494A (en) * 1979-06-04 1982-11-02 Tellabs, Inc. Impedance canceller circuit
US4283604A (en) * 1979-06-04 1981-08-11 Tellabs, Inc. Current source circuits with common mode noise rejection
US4313225A (en) * 1979-11-05 1982-01-26 Bell Telephone Laboratories, Incorporated Opto-isolator hybrid circuit
DE3014187C2 (de) * 1980-04-14 1983-11-17 Nixdorf Computer Ag, 4790 Paderborn Schaltungsanordnung zum zweidrähtigen Anschluß eines Fernsprechteilnehmers an je eine Leitung für angehende und ankommende Signale
JPS5775060A (en) * 1980-10-28 1982-05-11 Nec Corp Current supply circuit having power source noise eliminating circuit
JPS57104336A (en) * 1980-12-20 1982-06-29 Oki Electric Ind Co Ltd Hybrid circuit
DE3104138A1 (de) * 1981-02-06 1982-08-19 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Teilnehmerschaltung
US4419542A (en) * 1982-05-17 1983-12-06 Bell Telephone Laboratories, Incorporated Battery feed circuit
CA1178386A (en) * 1982-06-07 1984-11-20 Stanley D. Rosenbaum Active impedance transformer assisted line feed circuit
US4524246A (en) * 1982-07-07 1985-06-18 Harris Corporation SLIC II--common-mode current rejection
DE3237681C2 (de) * 1982-10-12 1986-03-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand
GB2132448B (en) * 1982-12-07 1986-03-12 Standard Telephones Cables Ltd Telephone subscribers' line interface circuit
US4554412A (en) * 1984-07-23 1985-11-19 At&T Information Systems Inc. Resistive line circuit
US4813066A (en) * 1987-07-13 1989-03-14 American Telephone And Telegraph Company, At&T Information Systems Battery feed circuit for a telephone system
US4831650A (en) * 1988-05-16 1989-05-16 Palco Telecom, Inc. Adaptive telephone receive control
GB2224909A (en) * 1988-11-11 1990-05-16 Stc Plc Balanced constant current feed for subscriber lines
US5014305A (en) * 1989-03-16 1991-05-07 Northern Telecom Limited Line interface circuit
US5052039A (en) * 1990-01-16 1991-09-24 Northern Telecom Limited Line interface circuit
US5544243A (en) * 1993-05-17 1996-08-06 Vxi Corporation Telephone headset interface circuit
US6128384A (en) * 1997-12-22 2000-10-03 Vxi Corporation Self configuring telephone headset amplifier
US6731728B2 (en) * 1998-04-07 2004-05-04 Agere Systems Inc. Low noise line powered DAA with differential feedback
WO2002021811A2 (en) * 2000-09-06 2002-03-14 Polycom, Inc. System and method for diagnosing a pots port
CN109445507B (zh) * 2018-11-23 2023-12-22 天津三源兴泰微电子技术有限公司 一种宽频率内高电源抑制比的带隙基准电路

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1290202B (de) * 1966-09-30 1969-03-06 Merk Gmbh Telefonbau Fried Schaltungsanordnung fuer die Speisung von Fernsprechteilnehmerstellen
GB1230054A (sv) * 1969-04-08 1971-04-28
US3649769A (en) * 1970-10-28 1972-03-14 Gen Electric Circuit for supplying direct current to a telephone line
FR2254168A1 (en) * 1973-12-11 1975-07-04 Ass Ouvriers Instr Precision Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C.
US3940572A (en) * 1974-04-24 1976-02-24 Dracon Industries Power supply for key telephone system
FR2279287A1 (fr) * 1974-07-16 1976-02-13 Cit Alcatel Unite d'alimentation a intensite constante
US3955052A (en) * 1974-11-18 1976-05-04 Tadiran Israel Electronics Industries Ltd. Subscriber unit particularly useful for time-division-multiplex system
US4007335A (en) * 1975-11-12 1977-02-08 Bell Telephone Laboratories, Incorporated Telephone line battery feed circuit

Also Published As

Publication number Publication date
CA1111587A (en) 1981-10-27
JPS5431204A (en) 1979-03-08
DE2822268A1 (de) 1978-12-07
FR2392557B1 (sv) 1982-04-02
FR2392557A1 (fr) 1978-12-22
US4087647A (en) 1978-05-02
GB1602232A (en) 1981-11-11

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