JPS5422706A - Digital 2-frequency audible signal sound generator circuit - Google Patents

Digital 2-frequency audible signal sound generator circuit

Info

Publication number
JPS5422706A
JPS5422706A JP8819177A JP8819177A JPS5422706A JP S5422706 A JPS5422706 A JP S5422706A JP 8819177 A JP8819177 A JP 8819177A JP 8819177 A JP8819177 A JP 8819177A JP S5422706 A JPS5422706 A JP S5422706A
Authority
JP
Japan
Prior art keywords
digital
signal sound
generator circuit
sound generator
audible signal
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
JP8819177A
Other languages
Japanese (ja)
Inventor
Takao Takeuchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8819177A priority Critical patent/JPS5422706A/en
Publication of JPS5422706A publication Critical patent/JPS5422706A/en
Pending legal-status Critical Current

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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To secure the necessary signal sound as well as to ensure variation of the sound level by providing the reading circuit for the necessary frequency plus a single memory and then adding these output together.
JP8819177A 1977-07-21 1977-07-21 Digital 2-frequency audible signal sound generator circuit Pending JPS5422706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8819177A JPS5422706A (en) 1977-07-21 1977-07-21 Digital 2-frequency audible signal sound generator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8819177A JPS5422706A (en) 1977-07-21 1977-07-21 Digital 2-frequency audible signal sound generator circuit

Publications (1)

Publication Number Publication Date
JPS5422706A true JPS5422706A (en) 1979-02-20

Family

ID=13936003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8819177A Pending JPS5422706A (en) 1977-07-21 1977-07-21 Digital 2-frequency audible signal sound generator circuit

Country Status (1)

Country Link
JP (1) JPS5422706A (en)

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