SE446798B - Forsterkare for anvendning bl a i en abonnentlinjekrets - Google Patents

Forsterkare for anvendning bl a i en abonnentlinjekrets

Info

Publication number
SE446798B
SE446798B SE8003419A SE8003419A SE446798B SE 446798 B SE446798 B SE 446798B SE 8003419 A SE8003419 A SE 8003419A SE 8003419 A SE8003419 A SE 8003419A SE 446798 B SE446798 B SE 446798B
Authority
SE
Sweden
Prior art keywords
amplifier
transistor
output
resistor
emitter
Prior art date
Application number
SE8003419A
Other languages
English (en)
Swedish (sv)
Inventor
Mil J F P Van
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 SE446798B publication Critical patent/SE446798B/sv

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)
SE8003419A 1979-05-10 1980-05-07 Forsterkare for anvendning bl a i en abonnentlinjekrets SE446798B (sv)

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 (1)

Publication Number Publication Date
SE446798B true SE446798B (sv) 1986-10-06

Family

ID=19833138

Family Applications (2)

Application Number Title Priority Date Filing Date
SE8003419A SE446798B (sv) 1979-05-10 1980-05-07 Forsterkare for anvendning bl a i en abonnentlinjekrets
SE8003419D SE8003419L (sv) 1979-05-10 1980-05-07 Forsterkare i linjekrets

Family Applications After (1)

Application Number Title Priority Date Filing Date
SE8003419D SE8003419L (sv) 1979-05-10 1980-05-07 Forsterkare i linjekrets

Country Status (11)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6239648B1 (en) 1996-11-08 2001-05-29 Telefonaktiebolaget Lm Ericsson (Publ) System and method for dissipating heat in an electric device

Families Citing this family (3)

* 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

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 (fr) * 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6239648B1 (en) 1996-11-08 2001-05-29 Telefonaktiebolaget Lm Ericsson (Publ) System and method for dissipating heat in an electric device

Also Published As

Publication number Publication date
DE3017566A1 (de) 1980-11-13
AU5811880A (en) 1980-11-13
JPS6333755B2 (fr) 1988-07-06
FR2456431A1 (fr) 1980-12-05
GB2050762B (en) 1983-03-16
IT1131453B (it) 1986-06-25
IT8021868A0 (it) 1980-05-07
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 (fr) 1984-12-28
NL7903663A (nl) 1980-11-12
CA1151331A (fr) 1983-08-02

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