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ES436824A1 - Telephone exchange resistance compensation circuit - has variable negative-resistance device, resistor and D.C. source - Google Patents

Telephone exchange resistance compensation circuit - has variable negative-resistance device, resistor and D.C. source

Info

Publication number
ES436824A1
ES436824A1 ES436824A ES436824A ES436824A1 ES 436824 A1 ES436824 A1 ES 436824A1 ES 436824 A ES436824 A ES 436824A ES 436824 A ES436824 A ES 436824A ES 436824 A1 ES436824 A1 ES 436824A1
Authority
ES
Spain
Prior art keywords
resistor
variable negative
resistance
source
compensation circuit
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
ES436824A
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 ES436824A1 publication Critical patent/ES436824A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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

  • Interface Circuits In Exchanges (AREA)
  • Networks Using Active Elements (AREA)

Abstract

A resistive losses compensating device can compensate an ohmic resistor or a device with linear current-voltage characteristic such as an electronic switch. The device consists of a variable negative-resistance element, a resistor and a direct current source connected in series with the electronic switch. The various components of the device make-up a circuit such that the volt drop across the direct current source and the resistor is sensed by a comparator which controls the variable negative-resistance element so as to reduce to zero the volt-drop. The variable negative-resistance element has two operational amplifiers with feedback.
ES436824A 1974-04-22 1975-04-22 Telephone exchange resistance compensation circuit - has variable negative-resistance device, resistor and D.C. source Expired ES436824A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742419286 DE2419286C2 (en) 1974-04-22 1974-04-22 Circuit arrangement for de-attenuating electrical switches with different direct current and alternating current resistances, in particular coupling elements of a telephone exchange

Publications (1)

Publication Number Publication Date
ES436824A1 true ES436824A1 (en) 1976-12-01

Family

ID=5913551

Family Applications (1)

Application Number Title Priority Date Filing Date
ES436824A Expired ES436824A1 (en) 1974-04-22 1975-04-22 Telephone exchange resistance compensation circuit - has variable negative-resistance device, resistor and D.C. source

Country Status (2)

Country Link
DE (1) DE2419286C2 (en)
ES (1) ES436824A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2587971A (en) * 1970-03-13 1972-08-31 TELETTRA LABORATORY DI TELEFONICA ELETTRONICA E RADIOS. Pa System and device tomake electronic semiconductors crosspoints
DE2156166C3 (en) * 1971-11-12 1982-01-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electronic switch

Also Published As

Publication number Publication date
DE2419286A1 (en) 1975-11-06
DE2419286C2 (en) 1984-02-16

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970701