CA1139470A - Circuit d'interface de lignes sans transformateur - Google Patents

Circuit d'interface de lignes sans transformateur

Info

Publication number
CA1139470A
CA1139470A CA000364345A CA364345A CA1139470A CA 1139470 A CA1139470 A CA 1139470A CA 000364345 A CA000364345 A CA 000364345A CA 364345 A CA364345 A CA 364345A CA 1139470 A CA1139470 A CA 1139470A
Authority
CA
Canada
Prior art keywords
current
line
communication line
signals
source
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
CA000364345A
Other languages
English (en)
Inventor
Gordon F. Mein
John B. Terry
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.)
Nortel Networks Corp
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA000364345A priority Critical patent/CA1139470A/fr
Application granted granted Critical
Publication of CA1139470A publication Critical patent/CA1139470A/fr
Expired legal-status Critical Current

Links

Landscapes

  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
CA000364345A 1980-11-12 1980-11-12 Circuit d'interface de lignes sans transformateur Expired CA1139470A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000364345A CA1139470A (fr) 1980-11-12 1980-11-12 Circuit d'interface de lignes sans transformateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000364345A CA1139470A (fr) 1980-11-12 1980-11-12 Circuit d'interface de lignes sans transformateur

Publications (1)

Publication Number Publication Date
CA1139470A true CA1139470A (fr) 1983-01-11

Family

ID=4118406

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000364345A Expired CA1139470A (fr) 1980-11-12 1980-11-12 Circuit d'interface de lignes sans transformateur

Country Status (1)

Country Link
CA (1) CA1139470A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015051089A1 (fr) * 2013-10-04 2015-04-09 Omron Management Center Of America, Inc. Procédé et appareil pour une source de courant flottant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015051089A1 (fr) * 2013-10-04 2015-04-09 Omron Management Center Of America, Inc. Procédé et appareil pour une source de courant flottant
US9417649B2 (en) 2013-10-04 2016-08-16 Omron Management Center Of America, Inc. Method and apparatus for a floating current source

Similar Documents

Publication Publication Date Title
EP0309115B1 (fr) Circuit d'interface de ligne
US4322586A (en) Transformerless line interface circuit
US4514595A (en) Active impedance line feed circuit
US5619567A (en) Variable DC feed characteristic in a subscriber line interface circuit
US5138658A (en) Subscriber line interface circuit providing regulated current
US4203009A (en) Unbalanced/balanced converter circuits
US4300023A (en) Hybrid circuit
EP0178993B1 (fr) Configuration du circuit d'entrée pour un circuit d'interface d'une ligne d'abonné
GB2060315A (en) Interface circuit for telephone extension lines
US5600715A (en) Integrated loop current detector apparatus for a PSTN modem
US4103114A (en) Variable delay ringing detector
US4376876A (en) DC Supply for an electronic signalling device
US4803721A (en) DC control circuit
US4241243A (en) Power regulator for use with line signal repeaters which are remotely powered
US4571460A (en) Active impedance line feed circuit with improved ground fault protection
US4485341A (en) Current limiter circuit
CA1139470A (fr) Circuit d'interface de lignes sans transformateur
EP0058470B1 (fr) Circuit d'interface de ligne à compensation de courant
US4316135A (en) Circuit arrangement for feeding modules in user stations
EP0232317B1 (fr) Appareil d'etablissement d'une reference de terre pour des circuits speciaux telephoniques de clients alimentes par une alimentation a batterie flottante
US4896352A (en) Telephone set circuit including an overvoltage protection
US4025729A (en) Telephone ringing control circuits
US4436961A (en) Communications system connecting circuit for controlling derivation of operating power from subscriber line current
EP0096473B1 (fr) Circuit d'alimentation de ligne à impédance active
US4358645A (en) Loop sensing circuit for use with a subscriber loop interface circuit

Legal Events

Date Code Title Description
MKEX Expiry