BE777618A - Circuit generateur d'audiofrequences destine a exciter un transducteur electro-acoustique - Google Patents

Circuit generateur d'audiofrequences destine a exciter un transducteur electro-acoustique

Info

Publication number
BE777618A
BE777618A BE777618A BE777618A BE777618A BE 777618 A BE777618 A BE 777618A BE 777618 A BE777618 A BE 777618A BE 777618 A BE777618 A BE 777618A BE 777618 A BE777618 A BE 777618A
Authority
BE
Belgium
Prior art keywords
excite
electro
audio frequency
frequency generator
generator circuit
Prior art date
Application number
BE777618A
Other languages
English (en)
Inventor
G Sencer
Original Assignee
Microsystems Int Ltd
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 Microsystems Int Ltd filed Critical Microsystems Int Ltd
Publication of BE777618A publication Critical patent/BE777618A/fr

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)
BE777618A 1971-07-29 1971-12-31 Circuit generateur d'audiofrequences destine a exciter un transducteur electro-acoustique BE777618A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA119434A CA938039A (en) 1971-07-29 1971-07-29 Tone-generating circuit for energizing an electro-acoustic transducer

Publications (1)

Publication Number Publication Date
BE777618A true BE777618A (fr) 1972-04-17

Family

ID=4090468

Family Applications (1)

Application Number Title Priority Date Filing Date
BE777618A BE777618A (fr) 1971-07-29 1971-12-31 Circuit generateur d'audiofrequences destine a exciter un transducteur electro-acoustique

Country Status (4)

Country Link
BE (1) BE777618A (fr)
CA (1) CA938039A (fr)
FR (1) FR2147558A5 (fr)
IT (1) IT947704B (fr)

Also Published As

Publication number Publication date
CA938039A (en) 1973-12-04
FR2147558A5 (fr) 1973-03-09
IT947704B (it) 1973-05-30

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