ES8201797A1 - Perfeccionamientos en los generadores de tono para centralestelefonicas con division de tiempo - Google Patents

Perfeccionamientos en los generadores de tono para centralestelefonicas con division de tiempo

Info

Publication number
ES8201797A1
ES8201797A1 ES499684A ES499684A ES8201797A1 ES 8201797 A1 ES8201797 A1 ES 8201797A1 ES 499684 A ES499684 A ES 499684A ES 499684 A ES499684 A ES 499684A ES 8201797 A1 ES8201797 A1 ES 8201797A1
Authority
ES
Spain
Prior art keywords
transmission path
transistors
pam
collectors
conductor
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
ES499684A
Other languages
English (en)
Other versions
ES499684A0 (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.)
Italtel SpA
Original Assignee
Italtel SpA
Italtel Societa Italiana Telecomunicazioni SpA
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 Italtel SpA, Italtel Societa Italiana Telecomunicazioni SpA filed Critical Italtel SpA
Publication of ES499684A0 publication Critical patent/ES499684A0/es
Publication of ES8201797A1 publication Critical patent/ES8201797A1/es
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

GENERADOR DE TONO EN EL QUE SE MINIMIZA EL VALOR DE LA CORRIENTE QUE SE CIERRA A TRAVES DEL SISTEMA DE DISTRIBUCION DE LA ALIMENTACION, PARA SU APLICACION EN CENTRALES TELEFOCINAS CON DIVISION DE TIEMEPO. COMPRENDE UN OSCILADOR (OS) CAPAZ DE GENERAR UNA SEÑAL DE FRECUENCIA IGUAL A LA DEL TONO A ENVIAR A LOS USUARIOS; DICHA SEÑAL ALIMENTA A UN AMOPLIFICADOR OPERACIONAL (AO) QUE CONTROLA UN PAR DE TRANSISTORES (TS1,TS2) COMPLEMENTARIOS A TRAVES DE SU TERINAL BASE; LOS COLECTORES DE DICHOS TRANSISTORES ESTAN CONECTADOS, MEDIANTE RESISTENCIAS (R1,R2), A LOS POLOS POSITIVOS Y NEGATIVOS, RESPECTIVAMENTE DE UNA FUENTE DE ALIMENTACION.
ES499684A 1980-02-29 1981-02-21 Perfeccionamientos en los generadores de tono para centralestelefonicas con division de tiempo Expired ES8201797A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8020253A IT1209311B (it) 1980-02-29 1980-02-29 Generatore di toni per centrali telefoniche a divisione di tempo.

Publications (2)

Publication Number Publication Date
ES499684A0 ES499684A0 (es) 1982-01-01
ES8201797A1 true ES8201797A1 (es) 1982-01-01

Family

ID=11165170

Family Applications (1)

Application Number Title Priority Date Filing Date
ES499684A Expired ES8201797A1 (es) 1980-02-29 1981-02-21 Perfeccionamientos en los generadores de tono para centralestelefonicas con division de tiempo

Country Status (10)

Country Link
US (1) US4383313A (es)
AR (1) AR227909A1 (es)
BR (1) BR8101065A (es)
DE (1) DE3107637A1 (es)
ES (1) ES8201797A1 (es)
FR (1) FR2477347A1 (es)
GB (1) GB2073548A (es)
IT (1) IT1209311B (es)
PT (1) PT72584B (es)
SE (1) SE8100701L (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4995054A (en) * 1987-07-08 1991-02-19 Eckersley Gregory P Data transmission using switched resonance
US5825781A (en) * 1995-12-20 1998-10-20 Hubbell, Inc. Pulse amplitude modulated tone generator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE524024A (es) * 1952-11-07
DE1281400B (de) * 1958-03-26 1968-10-24 Dr Phil Helmut Pichler Verfahren zur kontinuierlichen Trennung von Gasen nach dem Prinzip der Gas-Elutions-Chromatographie
NL289607A (es) * 1962-03-02
US3519747A (en) * 1967-09-15 1970-07-07 Ibm Signal insertion and conferencing in a resonant transfer integrated time division switching and frequency division multiplexing communication system
FR2009623A1 (es) * 1968-05-30 1970-02-06 Sits Soc It Telecom Siemens
DE2000832C3 (de) * 1970-01-09 1979-11-22 Standard Elektrik Lorenz Ag, 7000 Stuttgart Rufverfahren und Rufeinrichtung für Zeitmultiplex-Vermittlungsanlagen
US4028628A (en) * 1975-12-05 1977-06-07 Bell Telephone Laboratories, Incorporated Transceivers for single channel carrier telephone systems

Also Published As

Publication number Publication date
BR8101065A (pt) 1981-09-01
ES499684A0 (es) 1982-01-01
GB2073548A (en) 1981-10-14
AR227909A1 (es) 1982-12-30
IT1209311B (it) 1989-07-16
SE8100701L (sv) 1981-08-30
DE3107637A1 (de) 1982-06-09
FR2477347A1 (fr) 1981-09-04
PT72584B (fr) 1982-03-12
PT72584A (fr) 1981-03-01
US4383313A (en) 1983-05-10
IT8020253A0 (it) 1980-02-29

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