NL8006773A - Actief spreeknetwerk voor een telefoontoestel. - Google Patents

Actief spreeknetwerk voor een telefoontoestel. Download PDF

Info

Publication number
NL8006773A
NL8006773A NL8006773A NL8006773A NL8006773A NL 8006773 A NL8006773 A NL 8006773A NL 8006773 A NL8006773 A NL 8006773A NL 8006773 A NL8006773 A NL 8006773A NL 8006773 A NL8006773 A NL 8006773A
Authority
NL
Netherlands
Prior art keywords
transistor
voltage
current
network
active voice
Prior art date
Application number
NL8006773A
Other languages
English (en)
Dutch (nl)
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of NL8006773A publication Critical patent/NL8006773A/nl

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • H04M1/585—Anti-side-tone circuits implemented without inductive element

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
NL8006773A 1979-12-13 1980-12-12 Actief spreeknetwerk voor een telefoontoestel. NL8006773A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10340479 1979-12-13
US06/103,404 US4332984A (en) 1979-12-13 1979-12-13 Active speech network circuit for a telephone set

Publications (1)

Publication Number Publication Date
NL8006773A true NL8006773A (nl) 1981-07-16

Family

ID=22294995

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8006773A NL8006773A (nl) 1979-12-13 1980-12-12 Actief spreeknetwerk voor een telefoontoestel.

Country Status (10)

Country Link
US (1) US4332984A (de)
JP (1) JPS5693462A (de)
CA (1) CA1152242A (de)
CH (1) CH651712A5 (de)
DE (1) DE3046328A1 (de)
FR (1) FR2472317B1 (de)
GB (1) GB2066026B (de)
IT (1) IT1134682B (de)
NL (1) NL8006773A (de)
SE (1) SE455982B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400588A (en) * 1981-06-15 1983-08-23 Gte Automatic Electric Labs Inc. Electronic voice network for a telephone subscriber's substation
NL8200666A (nl) * 1982-02-19 1983-09-16 Philips Nv Transmissieschakeling voor een elektronisch telefoontoestel.
US4495382A (en) * 1982-04-23 1985-01-22 Fairchild Camera And Instrument Corporation Telephone regulator circuitry
US4442322A (en) * 1982-07-07 1984-04-10 Gte Automatic Electric Inc. Electronic common switch having an improved receiver mating arrangement
DE3504304A1 (de) * 1985-02-08 1986-08-14 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung fuer eine fernsprechteilnehmerstation mit einem mfv-(mehrfrequenz-)sender

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546395A (en) * 1968-01-15 1970-12-08 Bell Telephone Labor Inc Active telephone set speech network employing transistor feedback loop for sidetone balance and equalization
NL7402575A (nl) * 1974-02-26 1975-08-28 Philips Nv Elektronisch telefoontoestel.
CA1032221A (en) * 1974-06-14 1978-05-30 Mitel Canada Limited Telephone line impedance regulator
JPS5356903A (en) * 1976-11-02 1978-05-23 Nippon Telegr & Teleph Corp <Ntt> Automatic level control circuit for telephone set
GB1546046A (en) * 1976-12-03 1979-05-16 Cselt Centro Studi Lab Telecom Transmitting and receiving circuit for subscriber telephone sets
US4071713A (en) * 1976-12-27 1978-01-31 Northern Telecom Limited Telephone speech network
CA1056970A (en) * 1977-01-10 1979-06-19 Northern Telecom Limited Electronic network for telephone set
DE2813580A1 (de) * 1978-03-29 1979-10-04 Siemens Ag Schaltungsanordnung fuer ueber anschlussleitungen gespeiste teilnehmerstationen mit zusatzgeraeten in fernmelde- insbesondere fernsprechanlagen

Also Published As

Publication number Publication date
CH651712A5 (de) 1985-09-30
FR2472317A1 (fr) 1981-06-26
US4332984A (en) 1982-06-01
SE455982B (sv) 1988-08-22
FR2472317B1 (fr) 1987-08-07
GB2066026B (en) 1984-07-25
GB2066026A (en) 1981-07-01
SE8008637L (sv) 1981-06-14
IT8026579A0 (it) 1980-12-11
DE3046328A1 (de) 1981-08-27
IT1134682B (it) 1986-08-13
CA1152242A (en) 1983-08-16
JPS5693462A (en) 1981-07-29

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed