TW350181B - Transformerless hybrid circuit having direct powered line-side amplifiers - Google Patents

Transformerless hybrid circuit having direct powered line-side amplifiers

Info

Publication number
TW350181B
TW350181B TW084104835A TW84104835A TW350181B TW 350181 B TW350181 B TW 350181B TW 084104835 A TW084104835 A TW 084104835A TW 84104835 A TW84104835 A TW 84104835A TW 350181 B TW350181 B TW 350181B
Authority
TW
Taiwan
Prior art keywords
hybrid circuit
line
telephone line
led
amplifier
Prior art date
Application number
TW084104835A
Other languages
English (en)
Inventor
Donald Thomas Cwynar
Donald Raymond Laturell
Original Assignee
At & T 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
Application filed by At & T Corp filed Critical At & T Corp
Application granted granted Critical
Publication of TW350181B publication Critical patent/TW350181B/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • 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
    • H04B1/587—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 using opto-couplers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0002—Modulated-carrier systems analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line
    • 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
    • H04B1/586—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 using an electronic circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Amplifiers (AREA)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
TW084104835A 1994-07-08 1995-05-16 Transformerless hybrid circuit having direct powered line-side amplifiers TW350181B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/272,501 US5528686A (en) 1994-07-08 1994-07-08 Transformerless hybrid circuit having direct powered line-side amplifiers

Publications (1)

Publication Number Publication Date
TW350181B true TW350181B (en) 1999-01-11

Family

ID=23040069

Family Applications (1)

Application Number Title Priority Date Filing Date
TW084104835A TW350181B (en) 1994-07-08 1995-05-16 Transformerless hybrid circuit having direct powered line-side amplifiers

Country Status (5)

Country Link
US (1) US5528686A (zh)
EP (1) EP0691752B1 (zh)
JP (1) JP3226762B2 (zh)
DE (1) DE69502138T2 (zh)
TW (1) TW350181B (zh)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6970834B2 (en) * 1990-06-15 2005-11-29 Arachnid, Inc. Advertisement downloading computer jukebox
US5465298A (en) * 1994-04-14 1995-11-07 Cermetek Microelectronics Solid state isolation device using opto-isolators
US5801549A (en) * 1996-12-13 1998-09-01 International Business Machines Corporation Simultaneous transmission bidirectional repeater and initialization mechanism
US5946393A (en) * 1997-02-10 1999-08-31 Integration Associates, Inc. Data access arrangement
US6205218B1 (en) * 1997-04-28 2001-03-20 Lucent Technologies, Inc. Extended feedback circuit for impedance matching and voltage isolation
US6757381B1 (en) * 1998-08-13 2004-06-29 Eugene Robert Worley Design of telephone line interface circuits using a two chip opto-coupler with LEDs integrated onto silicon chips
US6393110B1 (en) 1998-09-30 2002-05-21 3Com Corporation Methods and apparatus for terminating a line and supporting the asymmetric digital subscriber line protocol
US6643271B1 (en) 1999-04-30 2003-11-04 3Com Corporation Adjustable gain transmit cancellation in a full-duplex modem data access arrangement (DAA)
US6751202B1 (en) 1999-04-30 2004-06-15 3Com Corporation Filtered transmit cancellation in a full-duplex modem data access arrangement (DAA)
US6687371B1 (en) * 1999-10-08 2004-02-03 Agere Systems Inc. Maintaining an off-hook condition during a call bridge
US6788782B1 (en) 2000-01-20 2004-09-07 3Com Corporation Method and apparatus for switching between multiple communication lines
US6731752B1 (en) * 2000-11-08 2004-05-04 Viadux, Inc. Method and circuit for echo-cancellation in two-way communications
GB0325301D0 (en) * 2003-10-30 2003-12-03 Mitel Networks Corp Direct access arrangement
US8233301B1 (en) 2008-12-20 2012-07-31 Sensorlink Corporation Impedance dropping dc power supply having an impedance controlled converter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056719A (en) * 1975-02-10 1977-11-01 Bell Telephone Laboratories, Incorporated Two-way telephone transmission system utilizing opto-couplers
US4331842A (en) * 1980-02-11 1982-05-25 Reliance Electric Company Voice frequency repeater and term sets and other circuits therefor
US4479066A (en) * 1980-03-28 1984-10-23 At&T Bell Laboratories AC/DC Current divider circuit
US4514595A (en) * 1982-06-10 1985-04-30 Northern Telecom Limited Active impedance line feed circuit
US4757528A (en) * 1986-09-05 1988-07-12 Harris Corporation Thermally coupled information transmission across electrical isolation boundaries
US5245654A (en) * 1991-10-10 1993-09-14 Cermetek Microelectronics, Inc. Solid state isolation device using opto-isolators
US5280526C1 (en) * 1992-05-26 2001-05-01 Paradyne Corp Transformer-less hybrid circuit

Also Published As

Publication number Publication date
US5528686A (en) 1996-06-18
EP0691752B1 (en) 1998-04-22
DE69502138T2 (de) 1998-08-27
EP0691752A1 (en) 1996-01-10
DE69502138D1 (de) 1998-05-28
JPH0851495A (ja) 1996-02-20
JP3226762B2 (ja) 2001-11-05

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