FR2445076A1 - Interrupteur phonique pour centraux telephoniques de commutation a division de temps - Google Patents

Interrupteur phonique pour centraux telephoniques de commutation a division de temps

Info

Publication number
FR2445076A1
FR2445076A1 FR7930922A FR7930922A FR2445076A1 FR 2445076 A1 FR2445076 A1 FR 2445076A1 FR 7930922 A FR7930922 A FR 7930922A FR 7930922 A FR7930922 A FR 7930922A FR 2445076 A1 FR2445076 A1 FR 2445076A1
Authority
FR
France
Prior art keywords
time division
telephone switching
phone switch
division telephone
transistors
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.)
Withdrawn
Application number
FR7930922A
Other languages
English (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.)
Italtel SpA
Original Assignee
Societa Italiana Telecomunicazioni Siemens SpA
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 Societa Italiana Telecomunicazioni Siemens SpA filed Critical Societa Italiana Telecomunicazioni Siemens SpA
Publication of FR2445076A1 publication Critical patent/FR2445076A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/20—Time-division multiplex systems using resonant transfer

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

Interrupteur phonique comprenant des transistors T1 et T2 qui relient l'usager U au conducteur chaud de la voie phonique HW et qui sont commandés par des impulsions appliquées à leurs bases. Pour minimiser les courants parasites ia , à la base des transistors T1 et T 2 est aussi connecté le drain d'un transistor à effet de champ T4 , à la porte duquel sont appliquées lesdites impulsions au moyen d'un circuit dérivateur C1 , R1 , et à la source duquel sont connectés le système d'alimentation, au moyen d'une première résistance de polarisation R2 , et d'un condensateur C2 dont la deuxième armature est connectée au conducteur froid de la voie phonique HW, maintenu à un potentiel de référence au moyen d'une deuxième résistance R3 .
FR7930922A 1978-12-22 1979-12-18 Interrupteur phonique pour centraux telephoniques de commutation a division de temps Withdrawn FR2445076A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT7831257A IT7831257A0 (it) 1978-12-22 1978-12-22 Interruttore fonico per centrali telefoniche di commutazione a divisione di tempo.

Publications (1)

Publication Number Publication Date
FR2445076A1 true FR2445076A1 (fr) 1980-07-18

Family

ID=11233347

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7930922A Withdrawn FR2445076A1 (fr) 1978-12-22 1979-12-18 Interrupteur phonique pour centraux telephoniques de commutation a division de temps

Country Status (10)

Country Link
US (1) US4285057A (fr)
JP (1) JPS5590175A (fr)
AR (1) AR219022A1 (fr)
BR (1) BR7908361A (fr)
DE (1) DE2951523A1 (fr)
FR (1) FR2445076A1 (fr)
GB (1) GB2049355B (fr)
IT (1) IT7831257A0 (fr)
SE (1) SE7910422L (fr)
TR (1) TR20905A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629905A (en) * 1985-07-01 1986-12-16 Siemens Aktiengesellschaft Circuit arrangement comprising two feed circuits connectable to a load having mutually opposite poling
US5029168A (en) * 1989-02-27 1991-07-02 Acer Incorporated Multiplexing communication card and scanning method for run-in testing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2029039A1 (fr) * 1969-01-24 1970-10-16 Siemens Ag
FR2266990A1 (fr) * 1974-04-08 1975-10-31 Sits Soc It Telecom Siemens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621288A (en) * 1969-09-11 1971-11-16 Xerox Corp Multichannel switching system with unity-gain isolation amplifier operatively connected between the selected channel and remaining open channels
IT1009540B (it) * 1974-01-04 1976-12-20 Sits Soc It Telecom Siemens Interruttore con stadio separatore di tipo elettronico completamente integrato

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2029039A1 (fr) * 1969-01-24 1970-10-16 Siemens Ag
FR2266990A1 (fr) * 1974-04-08 1975-10-31 Sits Soc It Telecom Siemens

Also Published As

Publication number Publication date
AR219022A1 (es) 1980-07-15
IT7831257A0 (it) 1978-12-22
DE2951523A1 (de) 1980-07-10
GB2049355A (en) 1980-12-17
TR20905A (tr) 1982-12-24
US4285057A (en) 1981-08-18
SE7910422L (sv) 1980-06-23
GB2049355B (en) 1983-02-16
JPS5590175A (en) 1980-07-08
BR7908361A (pt) 1980-08-26

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Legal Events

Date Code Title Description
ST Notification of lapse