ES416860A1 - A circuit for the suppression of the continuous current of short circuit in the call. (Machine-translation by Google Translate, not legally binding) - Google Patents

A circuit for the suppression of the continuous current of short circuit in the call. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES416860A1
ES416860A1 ES416860A ES416860A ES416860A1 ES 416860 A1 ES416860 A1 ES 416860A1 ES 416860 A ES416860 A ES 416860A ES 416860 A ES416860 A ES 416860A ES 416860 A1 ES416860 A1 ES 416860A1
Authority
ES
Spain
Prior art keywords
circuit
call
tra
transistor
voltage
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
ES416860A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana 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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES416860A1 publication Critical patent/ES416860A1/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
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

A circuit for the suppression of short-circuit direct current in the call in telecommunication systems, without the use of contacts, in which the call alternating voltage is superimposed on the direct voltage, characterized in that the series circuit that includes the voltage source (g 1) and the call voltage source (rw) comprises a transistor (tra 1) connected between said voltage sources and having a direction that coincides with the direction of the direct current being said transistor (tra 1) put in by-pass by a first diode (d 1) that has a direction opposite to the direction of said direct current, a second diode (d 2) that puts in by-pass the source of direct voltage (g 1 ) and the transistor (tra 1) and having an opposite direction to that of the first diode (d 1) and a control unit (st-b 1) being arranged which in response to an increase in the current in the calling circuit above a predetermined value controls the third electrode of the transistor (tra 1) so that the latter cuts the dc circuit. (Machine-translation by Google Translate, not legally binding)
ES416860A 1972-07-12 1973-07-12 A circuit for the suppression of the continuous current of short circuit in the call. (Machine-translation by Google Translate, not legally binding) Expired ES416860A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT598572A AT333349B (en) 1972-07-12 1972-07-12 CIRCUIT ARRANGEMENT FOR DISCONNECTING THE SHORT-CIRCUIT DIRECT CURRENT IN CIRCUIT CIRCUITS OF REMOTE COMMUNICATION SYSTEMS

Publications (1)

Publication Number Publication Date
ES416860A1 true ES416860A1 (en) 1976-03-01

Family

ID=3581690

Family Applications (2)

Application Number Title Priority Date Filing Date
ES73416792A Expired ES416792A1 (en) 1972-07-12 1973-07-11 Circuit provision for the symmetric power supply of call circuits in telecommunication plans. (Machine-translation by Google Translate, not legally binding)
ES416860A Expired ES416860A1 (en) 1972-07-12 1973-07-12 A circuit for the suppression of the continuous current of short circuit in the call. (Machine-translation by Google Translate, not legally binding)

Family Applications Before (1)

Application Number Title Priority Date Filing Date
ES73416792A Expired ES416792A1 (en) 1972-07-12 1973-07-11 Circuit provision for the symmetric power supply of call circuits in telecommunication plans. (Machine-translation by Google Translate, not legally binding)

Country Status (3)

Country Link
AT (1) AT333349B (en)
DE (1) DE2335222C2 (en)
ES (2) ES416792A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT333349B (en) * 1972-07-12 1976-11-10 Itt Austria CIRCUIT ARRANGEMENT FOR DISCONNECTING THE SHORT-CIRCUIT DIRECT CURRENT IN CIRCUIT CIRCUITS OF REMOTE COMMUNICATION SYSTEMS
FR2451682A1 (en) * 1979-03-12 1980-10-10 Jeumont Schneider CALL DEVICE FOR AUTOMATIC SUBSCRIBER TELEPHONE INSTALLATION WITH ADDITIONAL STATIONS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT212387B (en) * 1958-01-31 1960-12-12 Siemens Ag Device for generating recurring pulse groups, in particular for an electronic call and signal machine
AT333349B (en) * 1972-07-12 1976-11-10 Itt Austria CIRCUIT ARRANGEMENT FOR DISCONNECTING THE SHORT-CIRCUIT DIRECT CURRENT IN CIRCUIT CIRCUITS OF REMOTE COMMUNICATION SYSTEMS

Also Published As

Publication number Publication date
AT333349B (en) 1976-11-10
ES416792A1 (en) 1976-02-16
DE2335222A1 (en) 1974-01-31
ATA598572A (en) 1976-03-15
DE2335222C2 (en) 1981-10-08

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