DE1031357B - Schaltungsanordnung fuer Fernsprechstationen mit Rueckhoerdaempfung und Transistorverstaerker - Google Patents

Schaltungsanordnung fuer Fernsprechstationen mit Rueckhoerdaempfung und Transistorverstaerker

Info

Publication number
DE1031357B
DE1031357B DEI9764A DEI0009764A DE1031357B DE 1031357 B DE1031357 B DE 1031357B DE I9764 A DEI9764 A DE I9764A DE I0009764 A DEI0009764 A DE I0009764A DE 1031357 B DE1031357 B DE 1031357B
Authority
DE
Germany
Prior art keywords
rückhoerdaempfung
circuit arrangement
telephone stations
transistor amplifiers
amplifiers
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.)
Pending
Application number
DEI9764A
Other languages
English (en)
Inventor
Lyndall C Pocock
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
Priority to GB329937X priority Critical
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to GB2950351X priority
Publication of DE1031357B publication Critical patent/DE1031357B/de
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/58Anti-side-tone circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/58Anti-side-tone circuits
    • H04M1/585Anti-side-tone circuits implemented without inductive element
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/60Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
DEI9764A 1954-02-08 1955-02-05 Schaltungsanordnung fuer Fernsprechstationen mit Rueckhoerdaempfung und Transistorverstaerker Pending DE1031357B (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB329937X 1954-02-08
GB2950351X 1956-01-04

Publications (1)

Publication Number Publication Date
DE1031357B true DE1031357B (de) 1958-06-04

Family

ID=32396016

Family Applications (2)

Application Number Title Priority Date Filing Date
DEI9764A Pending DE1031357B (de) 1954-02-08 1955-02-05 Schaltungsanordnung fuer Fernsprechstationen mit Rueckhoerdaempfung und Transistorverstaerker
DE1957J0013647 Pending DE1134119B (de) 1954-02-08 1957-08-30 Schaltungsanordnung fuer Teilnehmerstationen mit Transistorverstaerker fuer die ankommenden Rufwechselstrom-signale

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE1957J0013647 Pending DE1134119B (de) 1954-02-08 1957-08-30 Schaltungsanordnung fuer Teilnehmerstationen mit Transistorverstaerker fuer die ankommenden Rufwechselstrom-signale

Country Status (6)

Country Link
US (2) US2838612A (de)
BE (3) BE535520A (de)
CH (2) CH329937A (de)
DE (2) DE1031357B (de)
FR (5) FR1119874A (de)
GB (2) GB859111A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074088B (de) *
DE1132598B (de) * 1959-02-02 1962-07-05 Telephonie Amplifiee Soc Nouv Schaltungsanordnung fuer Rueckkopplungs-sperren in Lautfernsprechanlagen
DE2250645A1 (de) * 1972-03-10 1973-09-20 Zellweger Uster Ag Gabelschaltung

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE553926A (de) * 1954-02-08
CH369172A (de) * 1954-02-08 1963-05-15 Standard Telephon & Radio Ag Telephonteilnehmerstation
US3066195A (en) * 1958-09-15 1962-11-27 Gen Dynamics Corp Signal transmitting and receiving station
US3170043A (en) * 1961-09-29 1965-02-16 Bell Telephone Labor Inc Telephone anti-sidetone circuit
US3254160A (en) * 1962-12-27 1966-05-31 Gai Tronics Corp Regulated gain telephone handset receiver amplifier
US3250861A (en) * 1963-04-19 1966-05-10 Robert D Babylon Railroad way station telephone amplifier
US3462560A (en) * 1966-04-06 1969-08-19 Bell Telephone Labor Inc Subscriber telephone circuit with resistance hybrid sidetone balancing network
US3440367A (en) * 1966-05-06 1969-04-22 Bell Telephone Labor Inc Nonreactive antisidetone network for a telephone set
US3479468A (en) * 1967-03-10 1969-11-18 Bell Telephone Labor Inc Circuit for enabling simultaneous transmission in both directions on a two-wire line
US3529099A (en) * 1967-05-10 1970-09-15 Itt Telephone subset with resistive hybrid network
US3711660A (en) * 1969-12-04 1973-01-16 Univ Monash Hybrid networks
BE794023A (fr) * 1972-01-20 1973-05-02 Western Electric Co Amplificateur alimente par la ligne meme dans laquelle il debite
DE2840250C2 (de) * 1978-09-15 1983-01-20 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB679875A (en) * 1949-03-16 1952-09-24 Siemens Ag Improvements in or relating to an arrangement for telephone subscribers sets

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1872347A (en) * 1929-03-30 1932-08-16 Rca Corp Amplifier tube control
NL40011C (de) * 1932-04-30 1937-02-15
DE672791C (de) * 1932-07-23 1939-03-10 Werner Nestel Dipl Ing Verfahren zur Verminderung des Anodenstromverbrauches von Verstaerkern
US2858371A (en) * 1953-07-01 1958-10-28 Gen Electric Co Ltd Telephone subscribers' apparatus
BE553926A (de) * 1954-02-08
BE543085A (de) * 1954-12-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB679875A (en) * 1949-03-16 1952-09-24 Siemens Ag Improvements in or relating to an arrangement for telephone subscribers sets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074088B (de) *
DE1132598B (de) * 1959-02-02 1962-07-05 Telephonie Amplifiee Soc Nouv Schaltungsanordnung fuer Rueckkopplungs-sperren in Lautfernsprechanlagen
DE2250645A1 (de) * 1972-03-10 1973-09-20 Zellweger Uster Ag Gabelschaltung

Also Published As

Publication number Publication date
BE560458A (de)
FR1119874A (fr) 1956-06-26
US2950351A (en) 1960-08-23
FR78554E (fr) 1962-08-10
FR69988E (fr) 1959-01-30
GB865012A (en) 1961-04-12
GB859111A (en) 1961-01-18
FR72139E (fr) 1960-03-30
CH354121A (de) 1961-05-15
DE1134119B (de) 1962-08-02
BE535520A (de)
US2838612A (en) 1958-06-10
FR70935E (fr) 1959-09-30
BE553926A (de)
CH329937A (de) 1958-05-15

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