FR2268401A1 - 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
FR2268401A1
FR2268401A1 FR7512068A FR7512068A FR2268401A1 FR 2268401 A1 FR2268401 A1 FR 2268401A1 FR 7512068 A FR7512068 A FR 7512068A FR 7512068 A FR7512068 A FR 7512068A FR 2268401 A1 FR2268401 A1 FR 2268401A1
Authority
FR
France
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.)
Granted
Application number
FR7512068A
Other languages
French (fr)
Other versions
FR2268401B1 (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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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
Priority claimed from DE19742419286 external-priority patent/DE2419286C2/en
Priority claimed from DE19742419356 external-priority patent/DE2419356C2/en
Priority claimed from DE2419357A external-priority patent/DE2419357C3/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2268401A1 publication Critical patent/FR2268401A1/en
Application granted granted Critical
Publication of FR2268401B1 publication Critical patent/FR2268401B1/fr
Granted 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Networks Using Active Elements (AREA)
  • Interface Circuits In Exchanges (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.
FR7512068A 1974-04-22 1975-04-18 Telephone exchange resistance compensation circuit - has variable negative-resistance device, resistor and D.C. source Granted FR2268401A1 (en)

Applications Claiming Priority (3)

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
DE19742419356 DE2419356C2 (en) 1974-04-22 1974-04-22 Circuit arrangement for de-attenuation of coupling elements with linear current-voltage characteristics in a telephone exchange
DE2419357A DE2419357C3 (en) 1974-04-22 1974-04-22 Circuit arrangement for de-attenuation of electronic switches, in particular of semiconductor coupling elements of a telephone exchange

Publications (2)

Publication Number Publication Date
FR2268401A1 true FR2268401A1 (en) 1975-11-14
FR2268401B1 FR2268401B1 (en) 1978-09-01

Family

ID=27185901

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7512068A Granted FR2268401A1 (en) 1974-04-22 1975-04-18 Telephone exchange resistance compensation circuit - has variable negative-resistance device, resistor and D.C. source

Country Status (1)

Country Link
FR (1) FR2268401A1 (en)

Also Published As

Publication number Publication date
FR2268401B1 (en) 1978-09-01

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Legal Events

Date Code Title Description
ST Notification of lapse