WO1995002931A1 - Line driver with adaptive output impedance - Google Patents

Line driver with adaptive output impedance Download PDF

Info

Publication number
WO1995002931A1
WO1995002931A1 PCT/IB1994/000190 IB9400190W WO9502931A1 WO 1995002931 A1 WO1995002931 A1 WO 1995002931A1 IB 9400190 W IB9400190 W IB 9400190W WO 9502931 A1 WO9502931 A1 WO 9502931A1
Authority
WO
WIPO (PCT)
Prior art keywords
input
coupled
output
transconductor
terminal
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.)
Ceased
Application number
PCT/IB1994/000190
Other languages
English (en)
French (fr)
Inventor
Bram Nauta
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.)
Koninklijke Philips NV
Philips Norden AB
Original Assignee
Philips Electronics NV
Philips Norden AB
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 Philips Electronics NV, Philips Norden AB filed Critical Philips Electronics NV
Priority to EP94918489A priority Critical patent/EP0664937B1/en
Priority to DE69431905T priority patent/DE69431905T2/de
Priority to KR1019950700964A priority patent/KR100310550B1/ko
Priority to JP50443695A priority patent/JP3431077B2/ja
Publication of WO1995002931A1 publication Critical patent/WO1995002931A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0278—Arrangements for impedance matching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • 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
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/028—Arrangements specific to the transmitter end

Definitions

  • a line driver is an electronic buffer amplifier designed to have an output impedance matched to the characteristic impedance of a transmission line.
  • Transmission lines are widely used for conveying electrical signals. To minimise reflections the source and load impedances of the transmission line should be equal to the characteristic impedance of the transmission line.
  • a standard value for video applications is 75 ohms.
  • a buffer amplifier designed to drive a 75 ohm transmission line should have an output impedance of 75 ohms in order to minimise reflections.
  • the buffer sees a load impedance of 75 ohms, i.e. the impedance of the terminated transmission line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Networks Using Active Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Amplifiers (AREA)
  • Dc Digital Transmission (AREA)
PCT/IB1994/000190 1993-07-14 1994-07-04 Line driver with adaptive output impedance Ceased WO1995002931A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP94918489A EP0664937B1 (en) 1993-07-14 1994-07-04 Line driver with adaptive output impedance
DE69431905T DE69431905T2 (de) 1993-07-14 1994-07-04 Leitungstreiber mit adaptiver ausgangsimpedanz
KR1019950700964A KR100310550B1 (ko) 1993-07-14 1994-07-04 적응 출력 임피던스를 구비한 라인구동기
JP50443695A JP3431077B2 (ja) 1993-07-14 1994-07-04 適応出力インピーダンスを備えたラインドライバ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP93202166 1993-07-14
EP93202166.0 1993-07-14

Publications (1)

Publication Number Publication Date
WO1995002931A1 true WO1995002931A1 (en) 1995-01-26

Family

ID=8214000

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1994/000190 Ceased WO1995002931A1 (en) 1993-07-14 1994-07-04 Line driver with adaptive output impedance

Country Status (7)

Country Link
US (1) US5510751A (enExample)
EP (1) EP0664937B1 (enExample)
JP (1) JP3431077B2 (enExample)
KR (1) KR100310550B1 (enExample)
DE (1) DE69431905T2 (enExample)
TW (1) TW239239B (enExample)
WO (1) WO1995002931A1 (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998021859A3 (en) * 1996-11-12 1998-07-09 Ericsson Telefon Ab L M Output buffer circuit
WO1998038774A3 (en) * 1998-02-02 1998-11-26 Koninkl Philips Electronics Nv Line driver with adaptive output impedance
WO1998038773A3 (en) * 1998-02-02 1998-11-26 Koninkl Philips Electronics Nv Line driver with adaptive output impedance
US5936393A (en) * 1997-02-25 1999-08-10 U.S. Philips Corporation Line driver with adaptive output impedance
US5973490A (en) * 1997-02-25 1999-10-26 U.S. Philips Corporation Line driver with adaptive output impedance

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19706985B4 (de) * 1997-02-21 2004-03-18 Telefonaktiebolaget L M Ericsson (Publ) Eingangspufferschaltkreis
EP0917788B1 (en) * 1997-02-25 2006-06-07 Koninklijke Philips Electronics N.V. Line driver with adaptive output impedance
JPH1197954A (ja) * 1997-09-18 1999-04-09 Canon Inc 増幅回路
SE511825C2 (sv) * 1998-03-31 1999-12-06 Ericsson Telefon Ab L M Förfarande och anordning i en analog linjekrets
US6191655B1 (en) 1999-08-27 2001-02-20 Conexant Systems, Inc. Six inverting amplifier transconductance stage and methods for its use
US6788745B1 (en) * 1999-11-17 2004-09-07 Fujitsu Limited Circuit and method for active termination of a transmission line
US6331785B1 (en) 2000-01-26 2001-12-18 Cirrus Logic, Inc. Polling to determine optimal impedance
US6229396B1 (en) 2000-02-04 2001-05-08 Stmicroelectronics, Inc. Controlled impedance transformer line driver
US6275078B1 (en) * 2000-02-04 2001-08-14 Stmicroelectronics, Inc. Self-adjustable impendance line driver
US6343024B1 (en) 2000-06-20 2002-01-29 Stmicroelectronics, Inc. Self-adjustable impedance line driver with hybrid
US6515516B2 (en) 2001-01-22 2003-02-04 Micron Technology, Inc. System and method for improving signal propagation
US6600373B1 (en) * 2002-07-31 2003-07-29 Agere Systems, Inc. Method and circuit for tuning a transconductance amplifier
US6937099B2 (en) * 2003-12-04 2005-08-30 Analog Devices, Inc. Op-amp configurable in a non-inverting mode with a closed loop gain greater than one with output voltage correction for a time varying voltage reference of the op-amp, and a method for correcting the output voltage of such an op-amp for a time varying voltage reference
DE102004004488A1 (de) * 2004-01-26 2005-08-18 Siemens Ag Lokales Netz mit übertragerloser Signalübertragung
US20050213783A1 (en) * 2004-03-29 2005-09-29 Walsh William J Transmission drive line for low level audio analog electrical signals
KR100921517B1 (ko) 2006-12-05 2009-10-15 한국전자통신연구원 Ｎａｕｔａ 연산 상호 컨덕턴스 증폭기
US20090027112A1 (en) * 2007-07-26 2009-01-29 Chin Li Controllable precision transconductance
US8410824B2 (en) * 2009-05-21 2013-04-02 Qualcomm, Incorporated Buffer with active output impedance matching
DE102015101483B4 (de) * 2015-02-02 2025-07-03 Infineon Technologies Ag Verfahren, Schaltungsanordnung und integrierter Schaltkreischip zur Verwendung bei der Signalverarbeitung
US10013009B2 (en) * 2015-09-25 2018-07-03 Texas Instruments Incorporated Fault tolerant voltage regulator
US9853612B1 (en) 2017-03-23 2017-12-26 Globalfoundries Inc. Peaking amplifier frequency tuning
US9960738B1 (en) * 2017-03-23 2018-05-01 Globalfoundries Inc. Peaking amplifier frequency tuning

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969682A (en) * 1974-10-21 1976-07-13 Oberheim Electronics Inc. Circuit for dynamic control of phase shift
US4562406A (en) * 1982-09-16 1985-12-31 Ampex Corporation Current controlled amplifier
US5121080A (en) * 1990-12-21 1992-06-09 Crystal Semiconductor Corporation Amplifier with controlled output impedance
US5204636A (en) * 1992-05-05 1993-04-20 Xerox Corporation Dynamic limiting circuit for an amplifier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57211812A (en) * 1981-06-24 1982-12-25 Iwatsu Electric Co Ltd Wide band amplifier
US5034698A (en) * 1990-01-22 1991-07-23 Hiro Moriyasu Dual-path wideband and precision data acquisition system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969682A (en) * 1974-10-21 1976-07-13 Oberheim Electronics Inc. Circuit for dynamic control of phase shift
US4562406A (en) * 1982-09-16 1985-12-31 Ampex Corporation Current controlled amplifier
US5121080A (en) * 1990-12-21 1992-06-09 Crystal Semiconductor Corporation Amplifier with controlled output impedance
US5204636A (en) * 1992-05-05 1993-04-20 Xerox Corporation Dynamic limiting circuit for an amplifier

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998021859A3 (en) * 1996-11-12 1998-07-09 Ericsson Telefon Ab L M Output buffer circuit
US6201405B1 (en) 1996-11-12 2001-03-13 Telefonaktiebolaget Lm Ericsson Output buffer circuit
US5936393A (en) * 1997-02-25 1999-08-10 U.S. Philips Corporation Line driver with adaptive output impedance
US5973490A (en) * 1997-02-25 1999-10-26 U.S. Philips Corporation Line driver with adaptive output impedance
WO1998038774A3 (en) * 1998-02-02 1998-11-26 Koninkl Philips Electronics Nv Line driver with adaptive output impedance
WO1998038773A3 (en) * 1998-02-02 1998-11-26 Koninkl Philips Electronics Nv Line driver with adaptive output impedance

Also Published As

Publication number Publication date
DE69431905D1 (de) 2003-01-30
JPH08501674A (ja) 1996-02-20
KR950703818A (ko) 1995-09-20
KR100310550B1 (ko) 2001-12-17
TW239239B (enExample) 1995-01-21
JP3431077B2 (ja) 2003-07-28
EP0664937B1 (en) 2002-12-18
DE69431905T2 (de) 2003-07-24
US5510751A (en) 1996-04-23
EP0664937A1 (en) 1995-08-02

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