ES2111551T3 - Circuito de polarizacion de amplificador adecuado para un sistema de deteccion de interrupcion de llamada. - Google Patents

Circuito de polarizacion de amplificador adecuado para un sistema de deteccion de interrupcion de llamada.

Info

Publication number
ES2111551T3
ES2111551T3 ES91203307T ES91203307T ES2111551T3 ES 2111551 T3 ES2111551 T3 ES 2111551T3 ES 91203307 T ES91203307 T ES 91203307T ES 91203307 T ES91203307 T ES 91203307T ES 2111551 T3 ES2111551 T3 ES 2111551T3
Authority
ES
Spain
Prior art keywords
terminals
detection system
bypass
interruption detection
amplifier
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
ES91203307T
Other languages
English (en)
Inventor
Eddie Louis Marie Willocx
Johan Gabriel Augu Verkinderen
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel Alsthom Compagnie Generale dElectricite
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 Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel Alsthom Compagnie Generale dElectricite
Application granted granted Critical
Publication of ES2111551T3 publication Critical patent/ES2111551T3/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
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

ESTE CIRCUITO DE DERIVACION AMPLIFICADOR SE UTILIZA EN UN CIRCUITO DE DETENCION DE LLAMADA EN UNA COMUNICACION TELEFONICA PARA CONTROLAR LA DERIVACION DE UN AMPLIFICADOR SENSOR (SA) TENIENDO TERMINALES DE ENTRADA (L1,L2) ACOPLADOS A LOS TERMINALES DE SALIDA (AB) DE UN PUENTE HERTER (RO/R5) EL CUAL ESTA TAMBIEN ACOPLADO A UNA LINEA DE TELECOMUNICACION (L) Y A UNA FUENTE DE SEÑAL SONORA (RS). EL CIRCUITO DE DERIVACION LO CONSTITUYE UN LAZO DE RETROALIMENTACION NEGATIVO ENTRE LOS TERMINALES L1 Y L1, L2 DE SA Y REGULA EL VOLTAJE DE LOS ULTIMOS TERMINALES A UN VALOR DE REFERENCIA CUANDO EL VOLTAJE DE ENTRADA EN EL TERMINAL L1 EXCEDE UN VALOR PREDETERMINADO EN UNA DIRECCION, CONECTANDO UNA IMPEDANCIA DE DERIVACION VARIABLE (R6,PNP1,R7,PNP2) ENTRE LOS TERMINALES DE LA ENTRADA DEL AMPLIFICADOR Y EL VBAT.
ES91203307T 1991-12-16 1991-12-16 Circuito de polarizacion de amplificador adecuado para un sistema de deteccion de interrupcion de llamada. Expired - Lifetime ES2111551T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91203307A EP0551530B1 (en) 1991-12-16 1991-12-16 Amplifier biasing circuit suitable for a ring-trip detection system

Publications (1)

Publication Number Publication Date
ES2111551T3 true ES2111551T3 (es) 1998-03-16

Family

ID=8208076

Family Applications (1)

Application Number Title Priority Date Filing Date
ES91203307T Expired - Lifetime ES2111551T3 (es) 1991-12-16 1991-12-16 Circuito de polarizacion de amplificador adecuado para un sistema de deteccion de interrupcion de llamada.

Country Status (7)

Country Link
US (1) US5341108A (es)
EP (1) EP0551530B1 (es)
JP (1) JPH05299958A (es)
AU (1) AU658462B2 (es)
CA (1) CA2085415C (es)
DE (1) DE69128540T2 (es)
ES (1) ES2111551T3 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20041671A1 (it) * 2004-08-26 2004-11-26 Atmel Corp "sistema e metodo e apparecchio per conservare un margine di errore per una memoria non volatile"

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821468A (en) * 1972-03-22 1974-06-28 Sarkes Tarzian Digital special effects generator
US3821486A (en) * 1973-06-22 1974-06-28 Bell Telephone Labor Inc Bridge type supervisory detector with reduced breakdown voltage requirements
US4292478A (en) * 1979-05-25 1981-09-29 Plessey Canada Limited Interface circuits
GB2113030A (en) * 1981-12-31 1983-07-27 Rca Corp Circuitry for reducing common mode signals
JPS6089113A (ja) * 1983-10-20 1985-05-20 Nec Corp 平衡型アナログ信号増幅器
US4532381A (en) * 1984-02-13 1985-07-30 Northern Telecom Limited Active impedance line feed circuit
ATE70681T1 (de) * 1985-05-17 1992-01-15 Alcatel Nv Fernmeldeleitungsschaltung.
JPS6480108A (en) * 1987-09-21 1989-03-27 Toshiba Corp Base current compensation circuit
JP2567278B2 (ja) * 1989-01-25 1996-12-25 ファナック株式会社 光学式エンコーダのオフセット調整方法
JPH04104505A (ja) * 1990-08-23 1992-04-07 Fujitsu Ltd 半導体集積回路

Also Published As

Publication number Publication date
CA2085415C (en) 1998-06-16
AU658462B2 (en) 1995-04-13
DE69128540D1 (de) 1998-02-05
JPH05299958A (ja) 1993-11-12
US5341108A (en) 1994-08-23
AU2991492A (en) 1993-06-17
DE69128540T2 (de) 1998-06-10
CA2085415A1 (en) 1993-06-17
EP0551530B1 (en) 1997-12-29
EP0551530A1 (en) 1993-07-21

Similar Documents

Publication Publication Date Title
US4142075A (en) Interface circuit and method for telephone extension lines
US4101735A (en) Two-way loudspeaking device for telephone stations
US4160122A (en) Telephone earphone amplifier
US3963876A (en) Amplifier circuit for increasing transmit and receive levels in a telephone hybrid network
US3027429A (en) Loudspeaking telephone instrument
GB916545A (en) Improvements in or relating to loud speaking telephone sets
US4039766A (en) Electric two-to-four wire conversion circuit for use in telephone systems
ES2111551T3 (es) Circuito de polarizacion de amplificador adecuado para un sistema de deteccion de interrupcion de llamada.
ES362693A1 (es) Red de conversacion activa para instalaciones telefonicas.
US3075045A (en) Speakerphone
US3483335A (en) Equalizer circuitry utilizing photoresistors
US4440979A (en) Current sink for DPT channel unit
SE8602080L (sv) Anordning i ett telekommunikationssystem for att strommata en telefonapparat
GB2143104A (en) Shunt regulator for hands free telephone
US4467143A (en) Telephone conference amplifiers, and telephone conference bridges incorporating the same
JPS6223950B2 (es)
US3745262A (en) Amplifier arrangement for telephone instrument
TW346725B (en) High voltage detection circuit, bell signal detection circuit and no ringing call reception detection circuit
DK450987D0 (da) Kredsloebsforbindelse til at tilvejebringe isolation imellem et telefonapparts to transmissionsveje
GB727765A (en) Improvements in or relating to negative impedance devices
US3188577A (en) Automatic gain control circuit for an amplifier
US3440356A (en) Automatically compensating telephone substation
KR910001082Y1 (ko) 스피커폰의 잡음 제거회로
KR940007129Y1 (ko) 키폰 전화기
KR960007512Y1 (ko) 파워 엠프를 이용한 전화 인터페이스 회로

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 551530

Country of ref document: ES