SE437452B - Dubbelriktad forsterkare anordnad att anslutas till en tvatradslinje - Google Patents

Dubbelriktad forsterkare anordnad att anslutas till en tvatradslinje

Info

Publication number
SE437452B
SE437452B SE7902675A SE7902675A SE437452B SE 437452 B SE437452 B SE 437452B SE 7902675 A SE7902675 A SE 7902675A SE 7902675 A SE7902675 A SE 7902675A SE 437452 B SE437452 B SE 437452B
Authority
SE
Sweden
Prior art keywords
line
amplifier
transistors
transistor
current
Prior art date
Application number
SE7902675A
Other languages
English (en)
Swedish (sv)
Other versions
SE7902675L (sv
Inventor
P F Blomley
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of SE7902675L publication Critical patent/SE7902675L/
Publication of SE437452B publication Critical patent/SE437452B/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
SE7902675A 1978-11-08 1979-03-26 Dubbelriktad forsterkare anordnad att anslutas till en tvatradslinje SE437452B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7843602A GB2034555B (en) 1978-11-08 1978-11-08 Bridge amplifier

Publications (2)

Publication Number Publication Date
SE7902675L SE7902675L (sv) 1980-05-09
SE437452B true SE437452B (sv) 1985-02-25

Family

ID=10500875

Family Applications (2)

Application Number Title Priority Date Filing Date
SE7902675A SE437452B (sv) 1978-11-08 1979-03-26 Dubbelriktad forsterkare anordnad att anslutas till en tvatradslinje
SE8404228A SE8404228L (sv) 1978-11-08 1984-08-24 Telefonkrets

Family Applications After (1)

Application Number Title Priority Date Filing Date
SE8404228A SE8404228L (sv) 1978-11-08 1984-08-24 Telefonkrets

Country Status (36)

Country Link
US (1) US4286123A (fr)
JP (1) JPS5566153A (fr)
AR (1) AR217354A1 (fr)
AT (1) AT376090B (fr)
AU (1) AU518350B2 (fr)
BE (1) BE879902A (fr)
BR (1) BR7901163A (fr)
CA (1) CA1149980A (fr)
CH (1) CH647114A5 (fr)
DD (1) DD141383A5 (fr)
DE (1) DE2856072C3 (fr)
DK (1) DK101079A (fr)
EG (1) EG14801A (fr)
ES (1) ES476608A1 (fr)
FI (1) FI790944A (fr)
FR (1) FR2441301A1 (fr)
GB (1) GB2034555B (fr)
GR (1) GR66659B (fr)
HK (1) HK49787A (fr)
HU (1) HU177459B (fr)
IL (1) IL56530A0 (fr)
IN (1) IN150998B (fr)
IT (1) IT1192686B (fr)
MX (1) MX146725A (fr)
NL (1) NL7812201A (fr)
NO (1) NO145811C (fr)
NZ (1) NZ189634A (fr)
PH (1) PH16061A (fr)
PL (1) PL125280B1 (fr)
PT (1) PT69609A (fr)
RO (1) RO80675A (fr)
SE (2) SE437452B (fr)
SU (1) SU1088677A3 (fr)
TR (1) TR20841A (fr)
YU (1) YU305478A (fr)
ZA (1) ZA79281B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2057815B (en) * 1979-08-31 1983-08-10 Standard Telephones Cables Ltd Electronic telephone circuit
US4536888A (en) * 1981-08-21 1985-08-20 Plantronics, Inc. Voice communication instrument system with line-powered receiver conditioning circuit
NL8304312A (nl) * 1983-12-15 1985-07-01 Philips Nv Telefooncircuit met klasse-b versterker.
JP3404848B2 (ja) * 1993-12-21 2003-05-12 ソニー株式会社 半導体装置
PL443367A1 (pl) * 2022-12-30 2024-01-29 Główny Instytut Górnictwa Polimerobeton oraz sposób jego otrzymywania

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175050A (en) * 1960-03-21 1965-03-23 Nat Company Inc Bi-directional signal circuit
US3238310A (en) * 1961-02-13 1966-03-01 Rca Corp Bidirectional amplifiers
US3359378A (en) * 1964-09-28 1967-12-19 Sanders Associates Inc Two-way amplifier
US3529099A (en) * 1967-05-10 1970-09-15 Itt Telephone subset with resistive hybrid network
US3573402A (en) * 1969-03-25 1971-04-06 Lorain Prod Corp Bidirectional additive amplifier
NL6916988A (fr) * 1969-11-11 1971-05-13
NL7200294A (fr) * 1972-01-08 1973-07-10
NL7307296A (fr) * 1973-05-25 1974-11-27
US3882274A (en) * 1974-02-28 1975-05-06 Regents State Of Florida Board Bidirectional digital amplifier
US4004091A (en) * 1975-06-26 1977-01-18 Motorola, Inc. Bidirectional line driver
DE2536201C2 (de) * 1975-08-13 1982-06-03 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für Fernmeldeanlagen insbesondere für Fernsprechapparate zur Abgabe von Wählimpulsen mit einem Transistor

Also Published As

Publication number Publication date
BE879902A (nl) 1980-05-08
YU305478A (en) 1983-04-30
GR66659B (fr) 1981-04-07
AR217354A1 (es) 1980-03-14
AU518350B2 (en) 1981-09-24
NO145811C (no) 1982-06-09
ATA922178A (de) 1984-02-15
JPH0228943B2 (fr) 1990-06-27
PT69609A (en) 1979-06-01
ES476608A1 (es) 1979-12-16
HU177459B (en) 1981-10-28
GB2034555A (en) 1980-06-04
RO80675A (fr) 1983-02-01
BR7901163A (pt) 1980-10-29
DE2856072C3 (de) 1986-10-23
DE2856072A1 (de) 1980-05-14
SE8404228D0 (sv) 1984-08-24
MX146725A (es) 1982-08-03
TR20841A (tr) 1982-10-19
FR2441301A1 (fr) 1980-06-06
EG14801A (en) 1985-03-31
AT376090B (de) 1984-10-10
CH647114A5 (de) 1984-12-28
IT1192686B (it) 1988-05-04
IN150998B (fr) 1983-02-12
FR2441301B1 (fr) 1983-12-30
NL7812201A (nl) 1980-05-12
JPS5566153A (en) 1980-05-19
CA1149980A (fr) 1983-07-12
AU4264278A (en) 1980-05-15
SE8404228L (sv) 1984-08-24
PL125280B1 (en) 1983-04-30
PH16061A (en) 1983-06-09
NZ189634A (en) 1981-05-15
NO145811B (no) 1982-02-22
GB2034555B (en) 1983-03-02
IL56530A0 (en) 1979-03-12
FI790944A (fi) 1980-05-09
PL213320A1 (fr) 1980-05-19
HK49787A (en) 1987-07-03
US4286123A (en) 1981-08-25
SE7902675L (sv) 1980-05-09
NO784313L (no) 1980-05-09
ZA79281B (en) 1980-01-30
SU1088677A3 (ru) 1984-04-23
DE2856072B2 (de) 1980-08-28
IT7919775A0 (it) 1979-02-01
DD141383A5 (de) 1980-04-23
DK101079A (da) 1980-05-09

Similar Documents

Publication Publication Date Title
US3525816A (en) Loop supervision circuitry
US4431874A (en) Balanced current multiplier circuit for a subscriber loop interface circuit
CA1164592A (fr) Systeme d'alimentation de lignes telephoniques
SE437320B (sv) Abonnentkoppling for anslutning av en telefonledning till en telefonvexel
US3989902A (en) Alternating current regulator for use with telephone type line
SE437452B (sv) Dubbelriktad forsterkare anordnad att anslutas till en tvatradslinje
SE450070B (sv) Trepolig strommatningskrets for telefonapparat
SE429081B (sv) Elektronisk sendare for likstromstelegrafi
EP0026541B1 (fr) Stabilisateur de tension approprié pour appareil téléphonique
JPS643387B2 (fr)
JPH0340556A (ja) 加重電流和形成回路
SE452834B (sv) Transistoriserad likriktarbrygga for anslutning av en abonnenttelefon till en telefonledning
US3906167A (en) Constant current powered telephone circuits
US4267408A (en) Arrangement for applying a signal to a transmission line
US4360709A (en) Loop detecting circuit
US4476351A (en) Subscriber loop current regulator
JP2628650B2 (ja) 電話器
US4562525A (en) DC Power supply circuit for line interface circuits
CA1151331A (fr) Amplificateur pour circuit de ligne
GB2066026A (en) Active speech network for a telephone set
JPH0336859A (ja) 電話機用電源回路
JPH0414904B2 (fr)
KR830001558B1 (ko) 브리지 증폭기
US4194091A (en) Line feed circuit
JPH0787501B2 (ja) 電話用給電回路

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 7902675-3

Effective date: 19890426

Format of ref document f/p: F