JPS5422707A - Digital 2-frequency audible signal sound generator circuit - Google Patents

Digital 2-frequency audible signal sound generator circuit

Info

Publication number
JPS5422707A
JPS5422707A JP8819277A JP8819277A JPS5422707A JP S5422707 A JPS5422707 A JP S5422707A JP 8819277 A JP8819277 A JP 8819277A JP 8819277 A JP8819277 A JP 8819277A JP S5422707 A JPS5422707 A JP S5422707A
Authority
JP
Japan
Prior art keywords
signal sound
data
output
digital
generator circuit
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
JP8819277A
Other languages
English (en)
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 JP8819277A priority Critical patent/JPS5422707A/ja
Publication of JPS5422707A publication Critical patent/JPS5422707A/ja
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)
  • Devices For Supply Of Signal Current (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
JP8819277A 1977-07-21 1977-07-21 Digital 2-frequency audible signal sound generator circuit Pending JPS5422707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8819277A JPS5422707A (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
JP8819277A JPS5422707A (en) 1977-07-21 1977-07-21 Digital 2-frequency audible signal sound generator circuit

Publications (1)

Publication Number Publication Date
JPS5422707A true JPS5422707A (en) 1979-02-20

Family

ID=13936028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8819277A Pending JPS5422707A (en) 1977-07-21 1977-07-21 Digital 2-frequency audible signal sound generator circuit

Country Status (1)

Country Link
JP (1) JPS5422707A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04326237A (ja) * 1991-04-25 1992-11-16 Sanyo Electric Co Ltd Ｄｔｍｆ発生回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04326237A (ja) * 1991-04-25 1992-11-16 Sanyo Electric Co Ltd Ｄｔｍｆ発生回路

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