EP0089350A1 - Elektronische abschluss-schaltung - Google Patents

Elektronische abschluss-schaltung

Info

Publication number
EP0089350A1
EP0089350A1 EP82902779A EP82902779A EP0089350A1 EP 0089350 A1 EP0089350 A1 EP 0089350A1 EP 82902779 A EP82902779 A EP 82902779A EP 82902779 A EP82902779 A EP 82902779A EP 0089350 A1 EP0089350 A1 EP 0089350A1
Authority
EP
European Patent Office
Prior art keywords
current
slic
signal
circuit
terminator
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.)
Withdrawn
Application number
EP82902779A
Other languages
English (en)
French (fr)
Other versions
EP0089350A4 (de
Inventor
Don W. Zobel
Dennis L. Welty
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of EP0089350A1 publication Critical patent/EP0089350A1/de
Publication of EP0089350A4 publication Critical patent/EP0089350A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • 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
    • H04M19/005—Feeding arrangements without the use of line transformers

Definitions

  • a high gain compensation circuit internal to SLIC 10 commonly referred to as the "C-circuit", which is operatively coupled to the Tip and Ring current sense inputs TSI and RSI as well as terminal CC and transistors 20, 22, causes the bias supplied to transistors 20, 22 to be varied such that the DC midpoint voltage of the subscriber loop resistive load is maintained midway between ground potential and V j r j r.
  • FIG. 2 there is illustrated electronic terminator circuit 100 which allows the use of SLIC 10 to be used as a terminator which is ground referenced to provide signal conversion from the two-wire Tip and Ring terminals 102 and 104 to four-wire unidirectional inputs at T ⁇ and R ⁇ inputs 106 and 108.
  • a bidirectional differential signal appearing across hybrid transformer 114 is supplied across terminals 102 and 104 through the line resistance symbolized by resistors 110 and 112.
  • This signal is then converted by SLIC 10 to appear as a proportional, single-ended signal at the T ⁇ output of SLIC 10 to be received by an utilization means coupled thereat.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
EP19820902779 1981-09-24 1982-08-06 Elektronische abschluss-schaltung. Withdrawn EP0089350A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30501281A 1981-09-24 1981-09-24
US305012 1981-09-24

Publications (2)

Publication Number Publication Date
EP0089350A1 true EP0089350A1 (de) 1983-09-28
EP0089350A4 EP0089350A4 (de) 1985-06-06

Family

ID=23178923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820902779 Withdrawn EP0089350A4 (de) 1981-09-24 1982-08-06 Elektronische abschluss-schaltung.

Country Status (4)

Country Link
EP (1) EP0089350A4 (de)
JP (1) JPS58501529A (de)
CA (1) CA1177985A (de)
WO (1) WO1983001162A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727574A (en) * 1985-09-24 1988-02-23 Northern Telecom Limited Subscriber line interface circuit with improved d.c. balance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7208148A (de) * 1972-06-15 1973-12-18
US3899646A (en) * 1974-05-28 1975-08-12 Bell Telephone Labor Inc Telephone set speech network
US4004109A (en) * 1975-05-09 1977-01-18 Boxall Frank S Hybrid circuit
US4041252A (en) * 1976-06-07 1977-08-09 North Electric Company Transformerless two-wire/four-wire hybrid with DC sourcing capability
US4203012A (en) * 1977-07-14 1980-05-13 Boxall Frank S Hybrid circuit using current mirror circuits
FR2437757A2 (fr) * 1978-06-26 1980-04-25 Trt Telecom Radio Electr Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique
US4300023A (en) * 1979-08-13 1981-11-10 Motorola, Inc. Hybrid circuit

Also Published As

Publication number Publication date
JPS58501529A (ja) 1983-09-08
WO1983001162A1 (en) 1983-03-31
CA1177985A (en) 1984-11-13
EP0089350A4 (de) 1985-06-06

Similar Documents

Publication Publication Date Title
US4192978A (en) Operational amplifier hybrid system
US4041252A (en) Transformerless two-wire/four-wire hybrid with DC sourcing capability
US3530260A (en) Transistor hybrid circuit
EP0503528B1 (de) Teilnehmerleitungsschnittstellenschaltung für ISDN- und POTS-Anwendungen, mit Echokompensationsschaltung
US4636771A (en) Power line communications terminal and interface circuit associated therewith
CA1202742A (en) Loop-start/ground-start line interface circuit
JP2850126B2 (ja) ラインインタフェース回路
US4203009A (en) Unbalanced/balanced converter circuits
US4514595A (en) Active impedance line feed circuit
US5465298A (en) Solid state isolation device using opto-isolators
US4827505A (en) Subscriber line interface circuit
JP2645022B2 (ja) 加入者回路
GB1570829A (en) Subscriber line interface circuit
JPH0888693A (ja) データアクセス装置および変換ハイブリッド並びに通信装置
US6192125B1 (en) Optical coupling circuit for a data access arrangement (DAA)
CA1177986A (en) Balanced current multiplier circuit for a subscriber loop interface circuit
US4558183A (en) Opto-coupler interfacing circuit
US4866768A (en) Station line interface circuit for a telecommunication network
CA2042292C (en) Impedance synthesis multiple loop using filtering means
GB1563658A (en) Interface circuits
US5020102A (en) Semi-floating AC/DC active termination circuit with current sink
US20100124326A1 (en) Subscriber line interface circuitry with common base audio isolation stage
CA1123131A (en) Transformerless trunk circuit
US4292479A (en) Separation and balance device for telephone exchanges
US4361732A (en) Trunk interface circuit with current compensation

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830517

AK Designated contracting states

Designated state(s): DE FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19850510

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ZOBEL, DON W.

Inventor name: WELTY, DENNIS L.