ES436825A1 - A circuit for investing the damping of the switching elements of a telephone central. (Machine-translation by Google Translate, not legally binding) - Google Patents

A circuit for investing the damping of the switching elements of a telephone central. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES436825A1
ES436825A1 ES436825A ES436825A ES436825A1 ES 436825 A1 ES436825 A1 ES 436825A1 ES 436825 A ES436825 A ES 436825A ES 436825 A ES436825 A ES 436825A ES 436825 A1 ES436825 A1 ES 436825A1
Authority
ES
Spain
Prior art keywords
circuit
measurement
damping
translation
switching elements
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
ES436825A
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 ES436825A1 publication Critical patent/ES436825A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/06—Modifications for ensuring a fully conducting state

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

A circuit to reverse the damping of the switching elements of a telephone exchange, characterized in that the electronic switch (RON), whose attenuation must be inverted, and inserts between a controllable negative resistance (-R) and a first measurement resistance (RM1), because a second measurement resistance (RM2) is connected in parallel with said series combination, both measurement resistors (RM1, RM2) having the same value, because the circuit is closed through a generator of (G), and because The two branches of the parallel circuit include the current measurement circuits (AL, A2) which supplies the value of the respective measured current to a comparator and control circuit which, in turn, adjusts the value of the negative resistance (- R) through a control output, in such a way that the currents (IM1, IM2) that flow through the two branches of the parallel circuit have the same value, the first measurement resistance (RM1) being short circuited by a shunt capacitor (C) for alternating current, and the useful current to be transmitted on both sides of the electronic switch (RON) is coupled. (Machine-translation by Google Translate, not legally binding)
ES436825A 1974-04-22 1975-04-22 A circuit for investing the damping of the switching elements of a telephone central. (Machine-translation by Google Translate, not legally binding) Expired ES436825A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742419358 DE2419358C2 (en) 1974-04-22 1974-04-22 Circuit arrangement for de-attenuation of electronic switches with linear current-voltage characteristics, in particular of coupling elements of a telephone exchange

Publications (1)

Publication Number Publication Date
ES436825A1 true ES436825A1 (en) 1977-04-01

Family

ID=5913587

Family Applications (1)

Application Number Title Priority Date Filing Date
ES436825A Expired ES436825A1 (en) 1974-04-22 1975-04-22 A circuit for investing the damping of the switching elements of a telephone central. (Machine-translation by Google Translate, not legally binding)

Country Status (2)

Country Link
DE (1) DE2419358C2 (en)
ES (1) ES436825A1 (en)

Also Published As

Publication number Publication date
DE2419358A1 (en) 1975-11-06
DE2419358C2 (en) 1982-04-08

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