CA938039A - Tone-generating circuit for energizing an electro-acoustic transducer - Google Patents

Tone-generating circuit for energizing an electro-acoustic transducer

Info

Publication number
CA938039A
CA938039A CA119434A CA119434A CA938039A CA 938039 A CA938039 A CA 938039A CA 119434 A CA119434 A CA 119434A CA 119434 A CA119434 A CA 119434A CA 938039 A CA938039 A CA 938039A
Authority
CA
Canada
Prior art keywords
energizing
tone
electro
generating circuit
acoustic transducer
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA119434A
Other versions
CA119434S (en
Inventor
Sencer Gulay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Microsystems International Ltd
Original Assignee
Microsystems International 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 International Ltd filed Critical Microsystems International Ltd
Priority to CA119434A priority Critical patent/CA938039A/en
Priority to BE777618A priority patent/BE777618A/en
Priority to IT2075272A priority patent/IT947704B/en
Priority to FR7206546A priority patent/FR2147558A5/fr
Application granted granted Critical
Publication of CA938039A publication Critical patent/CA938039A/en
Expired legal-status Critical Current

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)
CA119434A 1971-07-29 1971-07-29 Tone-generating circuit for energizing an electro-acoustic transducer Expired CA938039A (en)

Priority Applications (4)

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
BE777618A BE777618A (en) 1971-07-29 1971-12-31 AUDIO FREQUENCY GENERATOR CIRCUIT INTENDED TO EXCITE AN ELECTRO-ACOUSTIC TRANSDUCER
IT2075272A IT947704B (en) 1971-07-29 1972-02-18 TONE GENERATOR CIRCUIT FOR EXCITING AN ELECTRO ACOUSTIC TRANSDUCER
FR7206546A FR2147558A5 (en) 1971-07-29 1972-02-25

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
CA938039A true CA938039A (en) 1973-12-04

Family

ID=4090468

Family Applications (1)

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

Country Status (4)

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

Also Published As

Publication number Publication date
IT947704B (en) 1973-05-30
BE777618A (en) 1972-04-17
FR2147558A5 (en) 1973-03-09

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