SE8204441D0 - Elektronisk tonalstrarkrets - Google Patents

Elektronisk tonalstrarkrets

Info

Publication number
SE8204441D0
SE8204441D0 SE8204441A SE8204441A SE8204441D0 SE 8204441 D0 SE8204441 D0 SE 8204441D0 SE 8204441 A SE8204441 A SE 8204441A SE 8204441 A SE8204441 A SE 8204441A SE 8204441 D0 SE8204441 D0 SE 8204441D0
Authority
SE
Sweden
Prior art keywords
ringer
line
current
current sources
insensitivity
Prior art date
Application number
SE8204441A
Other languages
English (en)
Other versions
SE8204441L (sv
SE429707B (sv
Inventor
M L Embree
D C Goldthorp
D R Vogelpohl
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
Priority claimed from US06/067,717 external-priority patent/US4292604A/en
Priority claimed from US06/067,718 external-priority patent/US4276448A/en
Application filed by Western Electric Co filed Critical Western Electric Co
Publication of SE8204441D0 publication Critical patent/SE8204441D0/sv
Publication of SE8204441L publication Critical patent/SE8204441L/sv
Publication of SE429707B publication Critical patent/SE429707B/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Amplifiers (AREA)
  • Dc-Dc Converters (AREA)
  • Telephone Function (AREA)
  • Electrotherapy Devices (AREA)
SE8204441A 1979-08-20 1982-07-23 Tonalstrar krets SE429707B (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/067,717 US4292604A (en) 1979-08-20 1979-08-20 Relaxation oscillator with plural constant current sources
US06/067,718 US4276448A (en) 1979-08-20 1979-08-20 Electronic tone ringer

Publications (3)

Publication Number Publication Date
SE8204441D0 true SE8204441D0 (sv) 1982-07-23
SE8204441L SE8204441L (sv) 1982-07-23
SE429707B SE429707B (sv) 1983-09-19

Family

ID=26748187

Family Applications (2)

Application Number Title Priority Date Filing Date
SE8102406A SE428986B (sv) 1979-08-20 1981-04-14 Tonalstrarkrets
SE8204441A SE429707B (sv) 1979-08-20 1982-07-23 Tonalstrar krets

Family Applications Before (1)

Application Number Title Priority Date Filing Date
SE8102406A SE428986B (sv) 1979-08-20 1981-04-14 Tonalstrarkrets

Country Status (5)

Country Link
JP (1) JPS56501185A (sv)
DE (1) DE3049811C2 (sv)
GB (1) GB2071963B (sv)
SE (2) SE428986B (sv)
WO (1) WO1981000657A1 (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508937A (en) * 1983-02-28 1985-04-02 At&T Information Systems Inc. Method and circuitry for encoding telephone ringing signals
JPS61237559A (ja) * 1985-04-15 1986-10-22 Ricoh Co Ltd 呼出信号検出回路
FR2693335B1 (fr) * 1992-07-02 1994-08-05 Matra Communication Circuit de sonnerie notamment pour poste telephonique.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA952634A (en) * 1971-01-18 1974-08-06 Robert F. Mcalonie Tone ringer
US3740490A (en) * 1971-01-18 1973-06-19 Bell Telephone Labor Inc Tone ringer
DE2205559C3 (de) * 1972-02-07 1980-08-14 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für Wechselstrom-Anrufempfangsstrecken zur Verhinderung der Einwirkung von Gleichstromimpulsen
US3808379A (en) * 1972-05-30 1974-04-30 Gte Automatic Electric Lab Inc Telephone tone ringer
US3860764A (en) * 1973-01-12 1975-01-14 Itt Electronic tone generator
FR2235556B1 (sv) * 1973-06-28 1978-09-08 Person Jean Michel
US3867585A (en) * 1973-08-02 1975-02-18 Gte Automatic Electric Lab Inc Electronic tone ringer
US3965307A (en) * 1974-05-28 1976-06-22 Gte Automatic Electric Laboratories Incorporated Electronic tone ringer
US4046970A (en) * 1976-04-12 1977-09-06 Magnetic Controls Company Ringing detector for telephone circuits
US4081617A (en) * 1976-10-29 1978-03-28 Technex International Ltd. Electronic ringing circuit for telephone systems

Also Published As

Publication number Publication date
SE8102406L (sv) 1981-04-14
SE8204441L (sv) 1982-07-23
DE3049811T1 (de) 1982-02-25
GB2071963B (en) 1983-07-27
WO1981000657A1 (en) 1981-03-05
DE3049811C2 (de) 1987-04-16
SE428986B (sv) 1983-08-01
JPS56501185A (sv) 1981-08-20
SE429707B (sv) 1983-09-19
GB2071963A (en) 1981-09-23

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