ES2176361T3 - Etapa de excitacion. - Google Patents

Etapa de excitacion.

Info

Publication number
ES2176361T3
ES2176361T3 ES95944466T ES95944466T ES2176361T3 ES 2176361 T3 ES2176361 T3 ES 2176361T3 ES 95944466 T ES95944466 T ES 95944466T ES 95944466 T ES95944466 T ES 95944466T ES 2176361 T3 ES2176361 T3 ES 2176361T3
Authority
ES
Spain
Prior art keywords
exciting
stage
differential amplifier
output stages
excitation stage
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.)
Expired - Lifetime
Application number
ES95944466T
Other languages
English (en)
Inventor
Hans Oskar Eriksson
Carl-Henrik Malmgren
Henrik Helmer Hellberg
Elisabeth Maria Larsson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson 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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of ES2176361T3 publication Critical patent/ES2176361T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

EN UNA ETAPA EXCITADORA (1) PARA EXCITAR LAS DOS ETAPAS DE SALIDA DE UN AMPLIFICADOR DIFERENCIAL (2,3) DE UN CIRCUITO DE INTERFAZ DE LINEA DE ABONADO, DICHA ETAPA DE EXCITACION (1) ESTA ADAPTADA PARA GENERAR CUATRO CORRIENTES DE EXCITACION DEPENDIENDO, POR UNA PARTE, DE LAS SEÑALES TRANSVERSALES Y LONGITUDINALES IT E IL, RESPECTIVAMENTE, QUE ENTRAN EN LA ETAPA EXCITADORA Y, POR OTRA PARTE, DE LA CORRIENTE DE REFERENCIA IR, Y PARA SUMINISTRAR ESTAS CORRIENTES DE EXCITACION EN PARES A LAS DOS ENTRADAS DE LAS ETAPAS DE SALIDA DEL AMPLIFICADOR DIFERENCIAL (2,3), LAS CUATRO DE DICHAS CORRIENTES DE EXCITACION SON MAYORES DE CERO.
ES95944466T 1994-11-10 1995-11-08 Etapa de excitacion. Expired - Lifetime ES2176361T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9403875A SE503688C2 (sv) 1994-11-10 1994-11-10 Drivsteg

Publications (1)

Publication Number Publication Date
ES2176361T3 true ES2176361T3 (es) 2002-12-01

Family

ID=20395927

Family Applications (1)

Application Number Title Priority Date Filing Date
ES95944466T Expired - Lifetime ES2176361T3 (es) 1994-11-10 1995-11-08 Etapa de excitacion.

Country Status (12)

Country Link
US (1) US5901221A (es)
EP (1) EP0791245B1 (es)
JP (1) JPH10513018A (es)
KR (1) KR100390387B1 (es)
CN (1) CN1089506C (es)
AU (1) AU4680396A (es)
CA (1) CA2204873A1 (es)
DE (1) DE69526447T2 (es)
ES (1) ES2176361T3 (es)
FI (1) FI971888A0 (es)
SE (1) SE503688C2 (es)
WO (1) WO1996015592A1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6738855B1 (en) 2000-01-14 2004-05-18 National Semiconductor Corporation Communication interface between a TTL microcontroller and a RS232 Device avoiding level translation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8103572A (nl) * 1981-07-29 1983-02-16 Philips Nv Drijverschakeling.
FR2577737B1 (fr) * 1985-02-15 1987-04-17 Thomson Csf Circuit d'interface de ligne d'abonne telephonique avec mode de veille a puissance reduite
IT1215254B (it) * 1985-03-20 1990-01-31 Ates Componenti Elettron Circuito, integrabile monoliticamente, per la misura di correnti longitudinali e trasversali in una linea ditrasmissione bifilare.
US4841175A (en) * 1987-01-23 1989-06-20 Siemens Aktiengesellschaft ECL-compatible input/output circuits in CMOS technology
NL9001966A (nl) * 1990-09-06 1992-04-01 Philips Nv Versterkerschakeling.
JPH0595231A (ja) * 1991-10-03 1993-04-16 Nec Corp 出力回路
EP0622943B1 (en) * 1993-04-30 2001-09-12 STMicroelectronics S.r.l. Power management circuit for a subscriber line interface circuit
SE501975C2 (sv) * 1993-11-09 1995-07-03 Ericsson Telefon Ab L M Gränssnittskrets mellan fyrtrådsledning och tvåtrådsledning
US5649009A (en) * 1994-11-14 1997-07-15 Harris Corporation Differential longitudinal amplifier for a subscriber line interface circuit

Also Published As

Publication number Publication date
KR100390387B1 (ko) 2003-08-30
AU4680396A (en) 1996-06-06
FI971888A7 (fi) 1997-05-02
CN1089506C (zh) 2002-08-21
DE69526447D1 (de) 2002-05-23
DE69526447T2 (de) 2002-09-19
CN1165597A (zh) 1997-11-19
SE9403875L (sv) 1996-05-11
WO1996015592A1 (en) 1996-05-23
SE9403875D0 (sv) 1994-11-10
FI971888L (fi) 1997-05-02
EP0791245A1 (en) 1997-08-27
HK1007069A1 (en) 1999-04-01
CA2204873A1 (en) 1996-05-23
US5901221A (en) 1999-05-04
JPH10513018A (ja) 1998-12-08
SE503688C2 (sv) 1996-07-29
EP0791245B1 (en) 2002-04-17
FI971888A0 (fi) 1997-05-02

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