BE574169A - Circuit d'admission conditionnelle à transisteurs - Google Patents

Circuit d'admission conditionnelle à transisteurs

Info

Publication number
BE574169A
BE574169A BE574169A BE574169A BE574169A BE 574169 A BE574169 A BE 574169A BE 574169 A BE574169 A BE 574169A BE 574169 A BE574169 A BE 574169A BE 574169 A BE574169 A BE 574169A
Authority
BE
Belgium
Prior art keywords
transistors
admission circuit
conditional
conditional admission
circuit
Prior art date
Application number
BE574169A
Other languages
English (en)
Inventor
Byron Mcdermott
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 BE574169A publication Critical patent/BE574169A/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)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
BE574169A 1957-12-24 1958-12-23 Circuit d'admission conditionnelle à transisteurs BE574169A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US704986A US2883473A (en) 1957-12-24 1957-12-24 Transistor gating circuit

Publications (1)

Publication Number Publication Date
BE574169A true BE574169A (fr) 1959-04-16

Family

ID=24831640

Family Applications (1)

Application Number Title Priority Date Filing Date
BE574169A BE574169A (fr) 1957-12-24 1958-12-23 Circuit d'admission conditionnelle à transisteurs

Country Status (4)

Country Link
US (1) US2883473A (fr)
BE (1) BE574169A (fr)
FR (1) FR1213169A (fr)
GB (1) GB905155A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069503A (en) * 1957-12-30 1962-12-18 Itt Telephone call completion indicator
US3070667A (en) * 1958-12-15 1962-12-25 Bell Telephone Labor Inc Inaudible supervisory signaling system
US3051790A (en) * 1958-12-31 1962-08-28 Itt Answering signal detector for a private automatic branch exchange
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
GB946952A (en) * 1961-06-14 1964-01-15 Ass Elect Ind Improvements relating to voice-frequency signal receivers as used in telephone systems

Also Published As

Publication number Publication date
GB905155A (en) 1962-09-05
FR1213169A (fr) 1960-03-29
US2883473A (en) 1959-04-21

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