FR2355424A1 - Telephone unit control circuit - is used for two channel independent switching and has resistance bridge capacitance and transistor - Google Patents

Telephone unit control circuit - is used for two channel independent switching and has resistance bridge capacitance and transistor

Info

Publication number
FR2355424A1
FR2355424A1 FR7618092A FR7618092A FR2355424A1 FR 2355424 A1 FR2355424 A1 FR 2355424A1 FR 7618092 A FR7618092 A FR 7618092A FR 7618092 A FR7618092 A FR 7618092A FR 2355424 A1 FR2355424 A1 FR 2355424A1
Authority
FR
France
Prior art keywords
control circuit
transistor
resistance bridge
unit control
telephone unit
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
FR7618092A
Other languages
French (fr)
Other versions
FR2355424B1 (en
Inventor
Pascal Reynaud
Daniel Servant
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.)
Constr Telephoniques
Original Assignee
Constr Telephoniques
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 Constr Telephoniques filed Critical Constr Telephoniques
Priority to FR7618092A priority Critical patent/FR2355424A1/en
Priority to BR7703889A priority patent/BR7703889A/en
Priority to ES459788A priority patent/ES459788A1/en
Publication of FR2355424A1 publication Critical patent/FR2355424A1/en
Application granted granted Critical
Publication of FR2355424B1 publication Critical patent/FR2355424B1/fr
Granted 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
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

A control circuit of an individual unit in a telephone system enables command over one of an independent pair of control paths (ib1) or (ib2). The control circuit (cc) includes a resistance bridge network receiving command signals over the two paths. The resistance bridge (R1) to (R4) has a mid-point take off through a capacitor (C) to feed the base of a transistor (TR). The emitter stage of the transistor provides command signals via resistor (R6) to the unit (OC).
FR7618092A 1976-06-15 1976-06-15 Telephone unit control circuit - is used for two channel independent switching and has resistance bridge capacitance and transistor Granted FR2355424A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7618092A FR2355424A1 (en) 1976-06-15 1976-06-15 Telephone unit control circuit - is used for two channel independent switching and has resistance bridge capacitance and transistor
BR7703889A BR7703889A (en) 1976-06-15 1977-06-15 SINGELA UNIT CONTROL CIRCUIT BY TWO INDEPENDENT CHAINS
ES459788A ES459788A1 (en) 1976-06-15 1977-06-15 Telephone unit control circuit - is used for two channel independent switching and has resistance bridge capacitance and transistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7618092A FR2355424A1 (en) 1976-06-15 1976-06-15 Telephone unit control circuit - is used for two channel independent switching and has resistance bridge capacitance and transistor

Publications (2)

Publication Number Publication Date
FR2355424A1 true FR2355424A1 (en) 1978-01-13
FR2355424B1 FR2355424B1 (en) 1982-09-24

Family

ID=9174382

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7618092A Granted FR2355424A1 (en) 1976-06-15 1976-06-15 Telephone unit control circuit - is used for two channel independent switching and has resistance bridge capacitance and transistor

Country Status (3)

Country Link
BR (1) BR7703889A (en)
ES (1) ES459788A1 (en)
FR (1) FR2355424A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1390297A (en) * 1964-01-08 1965-02-26 Westinghouse Freins & Signaux Safety logic circuit of the type or
DE1290585B (en) * 1965-09-14 1969-03-13 Siemens Ag Error-protected gate circuit made up of a plurality of transistor amplifier stages connected in series
FR2176279A5 (en) * 1972-03-17 1973-10-26 Materiel Telephonique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1390297A (en) * 1964-01-08 1965-02-26 Westinghouse Freins & Signaux Safety logic circuit of the type or
DE1290585B (en) * 1965-09-14 1969-03-13 Siemens Ag Error-protected gate circuit made up of a plurality of transistor amplifier stages connected in series
FR2176279A5 (en) * 1972-03-17 1973-10-26 Materiel Telephonique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/64 *

Also Published As

Publication number Publication date
ES459788A1 (en) 1978-04-01
BR7703889A (en) 1978-05-23
FR2355424B1 (en) 1982-09-24

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Legal Events

Date Code Title Description
TP Transmission of property