ES8707828A1 - Un circuito de inversion de polaridad - Google Patents

Un circuito de inversion de polaridad

Info

Publication number
ES8707828A1
ES8707828A1 ES86552530A ES552530A ES8707828A1 ES 8707828 A1 ES8707828 A1 ES 8707828A1 ES 86552530 A ES86552530 A ES 86552530A ES 552530 A ES552530 A ES 552530A ES 8707828 A1 ES8707828 A1 ES 8707828A1
Authority
ES
Spain
Prior art keywords
differential amplifier
circuit
controlled
logic level
reference source
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
Application number
ES86552530A
Other languages
English (en)
Other versions
ES552530A0 (es
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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
Priority claimed from BE2/60632A external-priority patent/BE901837R/nl
Application filed by Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES552530A0 publication Critical patent/ES552530A0/es
Publication of ES8707828A1 publication Critical patent/ES8707828A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Electronic Switches (AREA)

Abstract

CIRCUITO DE INVERSION DE POLARIDAD. CONSTA DE UN CIRCUITO AMPLIFICADOR DIFERENCIAL (T1/4) CON UN PRIMER (T1/2) Y SEGUNDO (T3/4) AMPLIFICADOR INTERACOPLADOS QUE TIENEN UN CIRCUITO DE POLARIZACION COMUN (T5/6) ASI COMO UNA PRIMERA (TP1) Y SEGUNDA (TP2) ENTRADA, Y UNA FUENTE DE SEÑAL (NM2, T7, NM3, T8, C, CS1, CS2) QUE PERMITE APLICAR UNA PRIMERA TENSION CONSTANTE A DICHA PRIMERA ENTRADA (TP1) Y UNA SEGUNDA TENSION GRADUALMENTE VARIABLE A DICHA SEGUNDA ENTRADA (TP2) VIA AL MENOS EL CAMINO PUERTA-FUENTE DE UN PRIMER (NM2) Y SEGUNDO (M3) TRANSISTORES DE EFECTO DE CAMPO CON OBJETO DE INVERTIR LA POLARIDAD DE LA SEÑAL DE SALIDA SUMINISTRADA POR EL OPERACIONAL.
ES86552530A 1985-02-28 1986-02-28 Un circuito de inversion de polaridad Expired ES8707828A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2/60632A BE901837R (nl) 1983-10-21 1985-02-28 Telecommunicatielijnketen en bijbehorende polariteitsomkeerketen.

Publications (2)

Publication Number Publication Date
ES552530A0 ES552530A0 (es) 1987-08-01
ES8707828A1 true ES8707828A1 (es) 1987-08-01

Family

ID=3865734

Family Applications (1)

Application Number Title Priority Date Filing Date
ES86552530A Expired ES8707828A1 (es) 1985-02-28 1986-02-28 Un circuito de inversion de polaridad

Country Status (3)

Country Link
EP (1) EP0193244A2 (es)
AU (1) AU5364886A (es)
ES (1) ES8707828A1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU590809B2 (en) * 1985-12-20 1989-11-16 Alcatel N.V. Polarity reversal circuit
CA1291836C (en) * 1987-06-17 1991-11-05 Kenji Takato Battery feed circuit
DE69318551T2 (de) * 1993-07-29 1998-09-10 St Microelectronics Srl Integrierte Teilnehmerleitungsschnittstellenschaltung mit langsamem Polaritätsumschalter

Also Published As

Publication number Publication date
ES552530A0 (es) 1987-08-01
EP0193244A2 (en) 1986-09-03
AU5364886A (en) 1986-09-04

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