FR2441301A1 - Amplificateur bidirectionnel pour poste telephonique d'abonne - Google Patents

Amplificateur bidirectionnel pour poste telephonique d'abonne

Info

Publication number
FR2441301A1
FR2441301A1 FR7836640A FR7836640A FR2441301A1 FR 2441301 A1 FR2441301 A1 FR 2441301A1 FR 7836640 A FR7836640 A FR 7836640A FR 7836640 A FR7836640 A FR 7836640A FR 2441301 A1 FR2441301 A1 FR 2441301A1
Authority
FR
France
Prior art keywords
amplifier
subscriber telephone
bidirectional amplifier
line
subscriber
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.)
Granted
Application number
FR7836640A
Other languages
English (en)
Other versions
FR2441301B1 (fr
Inventor
Peter Fred Blomley
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.)
International Standard Electric Corp
Original Assignee
International 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2441301A1 publication Critical patent/FR2441301A1/fr
Application granted granted Critical
Publication of FR2441301B1 publication Critical patent/FR2441301B1/fr
Granted legal-status Critical Current

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

Abstract

LA PRESENTE INVENTION CONCERNE UN AMPLIFICATEUR BIDIRECTIONNEL POUR POSTE TELEPHONIQUE D'ABONNE. CET AMPLIFICATEUR EST CONSTITUE D'UN PONT COMPRENANT QUATRE TRANSISTORS (T1, T2, T3, T4), LES COLLECTEURS DES TRANSISTORS T1 ET T2 ETANT CONNECTES AUX BORNES L1 ET L2 DE LA LIGNE. AINSI, UN COURANT CIRCULE TOUJOURS DANS LA MEME DIRECTION DANS UNE RESISTANCE (R1), QUELLE QUE SOIT LA POLARITE DE LA LIGNE. APPLICATION COMME AMPLIFICATEUR DE PAROLE BIDIRECTIONNEL DANS UN CIRCUIT TELEPHONIQUE.
FR7836640A 1978-11-08 1978-12-28 Amplificateur bidirectionnel pour poste telephonique d'abonne Granted FR2441301A1 (fr)

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
FR2441301A1 true FR2441301A1 (fr) 1980-06-06
FR2441301B1 FR2441301B1 (fr) 1983-12-30

Family

ID=10500875

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836640A Granted FR2441301A1 (fr) 1978-11-08 1978-12-28 Amplificateur bidirectionnel pour poste telephonique d'abonne

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146185A2 (fr) * 1983-12-15 1985-06-26 Koninklijke Philips Electronics N.V. Circuit téléphonique comportant un amplificateur de classe B

Families Citing this family (3)

* 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
JP3404848B2 (ja) * 1993-12-21 2003-05-12 ソニー株式会社 半導体装置

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146185A2 (fr) * 1983-12-15 1985-06-26 Koninklijke Philips Electronics N.V. Circuit téléphonique comportant un amplificateur de classe B
EP0146185A3 (en) * 1983-12-15 1985-07-24 N.V. Philips' Gloeilampenfabrieken Telephone circuit comprising a class-b amplifier

Also Published As

Publication number Publication date
EG14801A (en) 1985-03-31
YU305478A (en) 1983-04-30
CH647114A5 (de) 1984-12-28
CA1149980A (fr) 1983-07-12
SE7902675L (sv) 1980-05-09
AR217354A1 (es) 1980-03-14
DD141383A5 (de) 1980-04-23
DE2856072C3 (de) 1986-10-23
PH16061A (en) 1983-06-09
GR66659B (fr) 1981-04-07
IN150998B (fr) 1983-02-12
DE2856072A1 (de) 1980-05-14
ATA922178A (de) 1984-02-15
DK101079A (da) 1980-05-09
RO80675A (fr) 1983-02-01
BE879902A (nl) 1980-05-08
IT7919775A0 (it) 1979-02-01
SE8404228L (sv) 1984-08-24
ZA79281B (en) 1980-01-30
PL125280B1 (en) 1983-04-30
FR2441301B1 (fr) 1983-12-30
SE437452B (sv) 1985-02-25
AU4264278A (en) 1980-05-15
PT69609A (en) 1979-06-01
ES476608A1 (es) 1979-12-16
AU518350B2 (en) 1981-09-24
TR20841A (tr) 1982-10-19
DE2856072B2 (de) 1980-08-28
NZ189634A (en) 1981-05-15
US4286123A (en) 1981-08-25
HU177459B (en) 1981-10-28
NO784313L (no) 1980-05-09
AT376090B (de) 1984-10-10
MX146725A (es) 1982-08-03
SE8404228D0 (sv) 1984-08-24
HK49787A (en) 1987-07-03
NL7812201A (nl) 1980-05-12
BR7901163A (pt) 1980-10-29
GB2034555B (en) 1983-03-02
IT1192686B (it) 1988-05-04
NO145811C (no) 1982-06-09
GB2034555A (en) 1980-06-04
SU1088677A3 (ru) 1984-04-23
IL56530A0 (en) 1979-03-12
NO145811B (no) 1982-02-22
FI790944A (fi) 1980-05-09
PL213320A1 (fr) 1980-05-19
JPS5566153A (en) 1980-05-19
JPH0228943B2 (fr) 1990-06-27

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Legal Events

Date Code Title Description
ST Notification of lapse