IN159075B - - Google Patents

Info

Publication number
IN159075B
IN159075B IN912/CAL/83A IN912CA1983A IN159075B IN 159075 B IN159075 B IN 159075B IN 912CA1983 A IN912CA1983 A IN 912CA1983A IN 159075 B IN159075 B IN 159075B
Authority
IN
India
Prior art keywords
supply
loop current
balanced
feeder
switch
Prior art date
Application number
IN912/CAL/83A
Inventor
Johann Sontheim
Baldur Stummer
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of IN159075B publication Critical patent/IN159075B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/008—Using DC/DC converters

Landscapes

  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Analogue/Digital Conversion (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
  • Electrotherapy Devices (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

1. A loop current supply for a characterising signal converter comprising : a) two supply resistors, each connected to a respective pole see diagramm : EP0104581,P7,F1 of a supply voltage (US ) and to a respective wire (a, b) of a telephone line via filter means and each balanced by a series arrangement of a feeder reactance (L1, L2) and an electronic switch (SE1, SE2) ; b) a regulating device (CC) which maintains the ratio of the voltage drop across the balanced supply resistors to the loop current (IS ) constant by closing and opening electronic switches (SE1, SE2) ; and c) respective switching elements (D1, D2) are each arranged at switch-end terminals of the feeder reactances (L1, L2), via which the loop current (IS ) flows when the electronic switches (SE1, SE2) are open.
IN912/CAL/83A 1982-09-22 1983-07-22 IN159075B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823235085 DE3235085A1 (en) 1982-09-22 1982-09-22 LOOP CURRENT INPUT FOR A MARKER

Publications (1)

Publication Number Publication Date
IN159075B true IN159075B (en) 1987-03-21

Family

ID=6173866

Family Applications (1)

Application Number Title Priority Date Filing Date
IN912/CAL/83A IN159075B (en) 1982-09-22 1983-07-22

Country Status (9)

Country Link
EP (1) EP0104581B1 (en)
JP (1) JPS5979669A (en)
AT (1) ATE34897T1 (en)
AU (1) AU542635B2 (en)
BR (1) BR8305168A (en)
DE (2) DE3235085A1 (en)
GR (1) GR79045B (en)
IN (1) IN159075B (en)
NO (1) NO833370L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8601774A (en) * 1986-07-08 1988-02-01 Philips Nv DC POWER SUPPLY FOR A TELECOMMUNICATIONS LINE.
DE4130213C2 (en) * 1991-09-11 1996-06-13 Siemens Uebertragungssys Gmbh Control circuit for a current regulating switching regulator
DE9321241U1 (en) * 1993-06-16 1996-09-26 Deutsche Telephonwerk Kabel Circuit arrangement for the supply of digital communication terminals
DE4326238C2 (en) * 1993-07-31 1997-09-11 Deutsche Telephonwerk Kabel Circuit arrangement for a transformerless physical interface

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056689A (en) * 1977-01-05 1977-11-01 Bell Telephone Laboratories, Incorporated Telephone subscriber line circuit
DE2748522B1 (en) * 1977-10-28 1979-04-26 Siemens Ag Arrangement for loop signaling
DE2911517C2 (en) * 1979-03-23 1981-07-09 Siemens AG, 1000 Berlin und 8000 München Subscriber connection circuit with earth button and insulation fault indication
DD143135A1 (en) * 1979-04-23 1980-07-30 Reinhard Lemke CIRCUIT ARRANGEMENT FOR LOSS-RELIABLE CONNECTION OF DC LINEAR CHARACTERISTICS IN TELEPHONE DISTRIBUTION EQUIPMENT
GB2065418B (en) * 1979-12-06 1984-02-15 Standard Telephones Cables Ltd Telephone line feed
US4315207A (en) * 1980-06-20 1982-02-09 Advanced Micro Devices, Inc. Current controlled battery feed circuit
US4387273A (en) * 1980-08-25 1983-06-07 International Telephone And Telegraph Corporation Subscriber line interface circuit with impedance synthesizer
EP0057009B1 (en) * 1981-01-28 1985-07-03 Hitachi, Ltd. Current supply circuit
DE3104138A1 (en) * 1981-02-06 1982-08-19 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg SUBSCRIBE CIRCUIT

Also Published As

Publication number Publication date
NO833370L (en) 1984-03-23
EP0104581A3 (en) 1985-06-19
GR79045B (en) 1984-10-02
ATE34897T1 (en) 1988-06-15
AU1932783A (en) 1984-03-29
DE3235085A1 (en) 1984-03-22
DE3376949D1 (en) 1988-07-07
EP0104581A2 (en) 1984-04-04
JPS5979669A (en) 1984-05-08
AU542635B2 (en) 1985-02-28
EP0104581B1 (en) 1988-06-01
BR8305168A (en) 1984-05-02

Similar Documents

Publication Publication Date Title
FR2421514A1 (en) CURRENT CONTROL CIRCUIT THROUGH A COIL
DE3479776D1 (en) Electronic switching device, preferably operating without making contact
FR2534086B1 (en) CONSTANT CURRENT GENERATOR CIRCUIT WITH LOW SUPPLY VOLTAGE, MONOLITHICALLY INTEGRAL
GR79045B (en)
DE3172547D1 (en) Failure-indicating circuit for a current load connected over an electronic switching device
GB1492187A (en) Switches for example controllable rectifiers and circuits for supplying control signals for controlling the switche
AU6107280A (en) Constant voltage subset circuit
JPS5726922A (en) Voltage comparator
GB2061033B (en) Electric lighting apparatus for a bicycle
JPS5519866A (en) Change-over switch for tap changers
JPS5494213A (en) Amplifier for transmitter
JPS56159716A (en) Direct-current electric power device
JPS6434093A (en) Direct current loop circuit
DE3570171D1 (en) Switch device with two terminals
JPS6452396A (en) High frequency heating device
JPS579157A (en) Connecting system for telephone device
JPS5715532A (en) High-frequency switching circuit
JPS535722A (en) Aut omatic voltage regulator of tap switching type
ES8704645A1 (en) Apparatus for the regulation of the voltage and the current for magneto-alternators (Machine-translation by Google Translate, not legally binding)
JPS5639673A (en) Electric talking current supply circuit
JPS5736577A (en) Power control device
DE3573699D1 (en) Active impedance transformer-assisted line feed circuit with filtering function of supervision signals
JPS55121616A (en) Regulating system for voltage autotransformer
JPS56159971A (en) Switching regulator
JPS56132026A (en) Contactless switch