BE573354A - Circuit d'admission conditionnelle d'un transisteur - Google Patents

Circuit d'admission conditionnelle d'un transisteur

Info

Publication number
BE573354A
BE573354A BE573354A BE573354A BE573354A BE 573354 A BE573354 A BE 573354A BE 573354 A BE573354 A BE 573354A BE 573354 A BE573354 A BE 573354A BE 573354 A BE573354 A BE 573354A
Authority
BE
Belgium
Prior art keywords
transistor
admission circuit
conditional
conditional admission
circuit
Prior art date
Application number
BE573354A
Other languages
English (en)
Inventor
Walter William Fritschi
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 BE573354A publication Critical patent/BE573354A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
BE573354A 1957-12-24 1958-11-27 Circuit d'admission conditionnelle d'un transisteur BE573354A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US704991A US2883474A (en) 1957-12-24 1957-12-24 Transistor gating circuit

Publications (1)

Publication Number Publication Date
BE573354A true BE573354A (fr) 1959-03-16

Family

ID=24831658

Family Applications (1)

Application Number Title Priority Date Filing Date
BE573354A BE573354A (fr) 1957-12-24 1958-11-27 Circuit d'admission conditionnelle d'un transisteur

Country Status (4)

Country Link
US (1) US2883474A (fr)
BE (1) BE573354A (fr)
FR (1) FR1214433A (fr)
GB (1) GB904749A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL107582C (fr) * 1958-04-03
US3051790A (en) * 1958-12-31 1962-08-28 Itt Answering signal detector for a private automatic branch exchange
DE1108748B (de) * 1959-08-04 1961-06-15 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer mit einem Transistor ausgeruestete Teilnehmerstationen
US3103558A (en) * 1959-09-24 1963-09-10 Int Standard Electric Corp ligotky
US3133158A (en) * 1960-06-09 1964-05-12 Ericsson Telefon Ab L M Voice frequency signal receiver
US3150232A (en) * 1961-02-06 1964-09-22 Edward R Schmidt Variable damping circuits
US3201524A (en) * 1961-03-27 1965-08-17 Itt Multi-frequency tone signaling system
US4002848A (en) * 1974-11-14 1977-01-11 Reliable Electric Company Toll fraud eliminator for telephone systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB654674A (en) * 1948-04-09 1951-06-27 Standard Telephones Cables Ltd Improvements in or relating to electric signalling systems

Also Published As

Publication number Publication date
US2883474A (en) 1959-04-21
GB904749A (en) 1962-08-29
FR1214433A (fr) 1960-04-08

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