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JPS5793770A - Digital audible signal tone generation system - Google Patents

Digital audible signal tone generation system

Info

Publication number
JPS5793770A
JPS5793770A JP16989280A JP16989280A JPS5793770A JP S5793770 A JPS5793770 A JP S5793770A JP 16989280 A JP16989280 A JP 16989280A JP 16989280 A JP16989280 A JP 16989280A JP S5793770 A JPS5793770 A JP S5793770A
Authority
JP
Japan
Prior art keywords
address
signal
rom6
ram5
written
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.)
Pending
Application number
JP16989280A
Other languages
Japanese (ja)
Inventor
Masatoshi Kumagai
Takashi Hatano
Yasunori Ogawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16989280A priority Critical patent/JPS5793770A/en
Publication of JPS5793770A publication Critical patent/JPS5793770A/en
Pending 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
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To generate various types of digital audible signals, by providing the 1st memory storing various types of digital audible tones and non-tones and the 2nd memory storing the readout address of the 1st memory and being rewritten if required. CONSTITUTION:A PCM-coded sine wave signal, modulation wave signal, multi- frequency mixed signal and no-tone are outputted from a signal generation circuit 1 and written in each address of an RAM5. An ROM6 is written with an intermittent control data of each audio signal, and an RAM7 is written with an address readout sequence of the RAM5 with the instruction of the ROM6. The content of the RAM7 is rewritten with the instruction of the ROM6 in the timing requiring for switching or interruption of the signal output, and the content of the RAM5 is read out and outputted with the rewritten address.
JP16989280A 1980-12-02 1980-12-02 Digital audible signal tone generation system Pending JPS5793770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16989280A JPS5793770A (en) 1980-12-02 1980-12-02 Digital audible signal tone generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16989280A JPS5793770A (en) 1980-12-02 1980-12-02 Digital audible signal tone generation system

Publications (1)

Publication Number Publication Date
JPS5793770A true JPS5793770A (en) 1982-06-10

Family

ID=15894888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16989280A Pending JPS5793770A (en) 1980-12-02 1980-12-02 Digital audible signal tone generation system

Country Status (1)

Country Link
JP (1) JPS5793770A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950657A (en) * 1982-09-16 1984-03-23 Fujitsu Ltd System for controlling audible signal
JPS59183571A (en) * 1983-04-01 1984-10-18 Iwatsu Electric Co Ltd Tone intermitting system
JPS6068761A (en) * 1983-09-26 1985-04-19 Oki Electric Ind Co Ltd Digital signal oscillator
US4719137A (en) * 1984-04-13 1988-01-12 Sharp Kabushiki Kaisha Magneto-optic memory element

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950657A (en) * 1982-09-16 1984-03-23 Fujitsu Ltd System for controlling audible signal
JPH0440909B2 (en) * 1982-09-16 1992-07-06 Fujitsu Ltd
JPS59183571A (en) * 1983-04-01 1984-10-18 Iwatsu Electric Co Ltd Tone intermitting system
JPS6068761A (en) * 1983-09-26 1985-04-19 Oki Electric Ind Co Ltd Digital signal oscillator
US4719137A (en) * 1984-04-13 1988-01-12 Sharp Kabushiki Kaisha Magneto-optic memory element

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