IT1131453B - Amplificatore per l'impiego in un circuito di linea telefonica - Google Patents

Amplificatore per l'impiego in un circuito di linea telefonica

Info

Publication number
IT1131453B
IT1131453B IT21868/80A IT2186880A IT1131453B IT 1131453 B IT1131453 B IT 1131453B IT 21868/80 A IT21868/80 A IT 21868/80A IT 2186880 A IT2186880 A IT 2186880A IT 1131453 B IT1131453 B IT 1131453B
Authority
IT
Italy
Prior art keywords
amplifier
telephone line
line circuit
circuit
telephone
Prior art date
Application number
IT21868/80A
Other languages
English (en)
Other versions
IT8021868A0 (it
Inventor
Franciscus Petrus Van Mil Job
Original Assignee
Philips Nv
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 Nv filed Critical Philips Nv
Publication of IT8021868A0 publication Critical patent/IT8021868A0/it
Application granted granted Critical
Publication of IT1131453B publication Critical patent/IT1131453B/it

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
IT21868/80A 1979-05-10 1980-05-07 Amplificatore per l'impiego in un circuito di linea telefonica IT1131453B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7903663A NL7903663A (nl) 1979-05-10 1979-05-10 Versterker voor toepassing in een lijncircuit.

Publications (2)

Publication Number Publication Date
IT8021868A0 IT8021868A0 (it) 1980-05-07
IT1131453B true IT1131453B (it) 1986-06-25

Family

ID=19833138

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21868/80A IT1131453B (it) 1979-05-10 1980-05-07 Amplificatore per l'impiego in un circuito di linea telefonica

Country Status (11)

Country Link
US (1) US4340869A (it)
JP (1) JPS55151852A (it)
AU (1) AU543026B2 (it)
BE (1) BE883194A (it)
CA (1) CA1151331A (it)
DE (1) DE3017566C2 (it)
FR (1) FR2456431A1 (it)
GB (1) GB2050762B (it)
IT (1) IT1131453B (it)
NL (1) NL7903663A (it)
SE (2) SE446798B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135854B (en) * 1983-02-10 1986-04-23 Robert James Redding Line-powered modem
NL8403549A (nl) * 1984-11-22 1986-06-16 Philips Nv Versterkerschakeling.
FR2637752A1 (fr) * 1988-10-07 1990-04-13 Radiotechnique Compelec Dispositif de limitation de courant de ligne pour terminal telephonique
SE507740C2 (sv) 1996-11-08 1998-07-06 Ericsson Telefon Ab L M Förfarande och anordning för avledning av effekt

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260955A (en) * 1959-02-02 1966-07-12 Franklin F Offner Differential amplifier
DE2159095C3 (de) * 1971-11-29 1985-01-24 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg In der Verstärkung einstellbarer mehrstufiger Verstärker mit niederohmigem Eingangs- und Ausgangswiderstand
US3896393A (en) * 1973-12-26 1975-07-22 Motorola Inc Monolithic power amplifier capable of operating class a and class ab
CH586983A5 (it) * 1974-12-23 1977-04-15 Ibm
US4064377A (en) * 1976-03-11 1977-12-20 Wescom Switching, Inc. Electronic hybrid and hybrid repeater
FR2371840A1 (fr) * 1976-10-04 1978-06-16 Ibm France Circuit d'interface
GB1527293A (en) * 1977-04-21 1978-10-04 Garwell K Composite collector load for class a semiconductor amplifier
US4211896A (en) * 1977-10-17 1980-07-08 Telecommunications Radioelectrique Et Telephoniques T.R.T. Subscriber's circuit with a symmetrical amplifier
FR2406357A1 (fr) * 1977-10-17 1979-05-11 Trt Telecom Radio Electr Joncteur d'abonne telephonique
US4268798A (en) * 1977-12-19 1981-05-19 Motorola, Inc. High performance summing amplifier

Also Published As

Publication number Publication date
DE3017566A1 (de) 1980-11-13
AU5811880A (en) 1980-11-13
JPS6333755B2 (it) 1988-07-06
FR2456431A1 (fr) 1980-12-05
GB2050762B (en) 1983-03-16
IT8021868A0 (it) 1980-05-07
SE446798B (sv) 1986-10-06
DE3017566C2 (de) 1985-10-10
AU543026B2 (en) 1985-03-28
GB2050762A (en) 1981-01-07
BE883194A (fr) 1980-11-10
JPS55151852A (en) 1980-11-26
SE8003419L (sv) 1980-11-11
US4340869A (en) 1982-07-20
FR2456431B1 (it) 1984-12-28
NL7903663A (nl) 1980-11-12
CA1151331A (en) 1983-08-02

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950531