FR2403690B1 - - Google Patents

Info

Publication number
FR2403690B1
FR2403690B1 FR7727764A FR7727764A FR2403690B1 FR 2403690 B1 FR2403690 B1 FR 2403690B1 FR 7727764 A FR7727764 A FR 7727764A FR 7727764 A FR7727764 A FR 7727764A FR 2403690 B1 FR2403690 B1 FR 2403690B1
Authority
FR
France
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
FR7727764A
Other languages
French (fr)
Other versions
FR2403690A1 (en
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.)
Laboratoire Central de Telecommunications SA
Original Assignee
Laboratoire Central de Telecommunications SA
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 Laboratoire Central de Telecommunications SA filed Critical Laboratoire Central de Telecommunications SA
Priority to FR7727764A priority Critical patent/FR2403690A1/en
Publication of FR2403690A1 publication Critical patent/FR2403690A1/en
Application granted granted Critical
Publication of FR2403690B1 publication Critical patent/FR2403690B1/fr
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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/40—Impedance converters
    • H03H11/42—Gyrators

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR7727764A 1977-09-14 1977-09-14 Active dipole gyrator for telephone line - uses transistor with base coupled to output of operational amplifier Granted FR2403690A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7727764A FR2403690A1 (en) 1977-09-14 1977-09-14 Active dipole gyrator for telephone line - uses transistor with base coupled to output of operational amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7727764A FR2403690A1 (en) 1977-09-14 1977-09-14 Active dipole gyrator for telephone line - uses transistor with base coupled to output of operational amplifier

Publications (2)

Publication Number Publication Date
FR2403690A1 FR2403690A1 (en) 1979-04-13
FR2403690B1 true FR2403690B1 (en) 1984-04-20

Family

ID=9195388

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7727764A Granted FR2403690A1 (en) 1977-09-14 1977-09-14 Active dipole gyrator for telephone line - uses transistor with base coupled to output of operational amplifier

Country Status (1)

Country Link
FR (1) FR2403690A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8204377A (en) * 1982-11-12 1984-06-01 Philips Nv SUBSCRIPTION CIRCUIT FOR A TELEPHONE NETWORK.
US6584196B1 (en) * 1999-05-14 2003-06-24 Conexant Systems, Inc. Electronic inductor with transmit signal telephone line driver
US6731749B1 (en) 1999-05-14 2004-05-04 Conexant Systems, Inc. Telephone line interface circuit with intelligent line current and voltage control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968773A (en) * 1959-12-17 1961-01-17 Bell Telephone Labor Inc Active one-port network

Also Published As

Publication number Publication date
FR2403690A1 (en) 1979-04-13

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Legal Events

Date Code Title Description
ST Notification of lapse