JPS5346204A - Tone detector - Google Patents

Tone detector

Info

Publication number
JPS5346204A
JPS5346204A JP12164776A JP12164776A JPS5346204A JP S5346204 A JPS5346204 A JP S5346204A JP 12164776 A JP12164776 A JP 12164776A JP 12164776 A JP12164776 A JP 12164776A JP S5346204 A JPS5346204 A JP S5346204A
Authority
JP
Japan
Prior art keywords
tone detector
hpf
high speed
output
response time
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.)
Granted
Application number
JP12164776A
Other languages
Japanese (ja)
Other versions
JPS5928103B2 (en
Inventor
Tsuneaki Oka
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP51121647A priority Critical patent/JPS5928103B2/en
Publication of JPS5346204A publication Critical patent/JPS5346204A/en
Publication of JPS5928103B2 publication Critical patent/JPS5928103B2/en
Expired 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To enable shortening the response time and the high speed operation, by making logical arithmetic operation for the output of HPF having different cutoff frequency.
JP51121647A 1976-10-09 1976-10-09 tone detector Expired JPS5928103B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51121647A JPS5928103B2 (en) 1976-10-09 1976-10-09 tone detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51121647A JPS5928103B2 (en) 1976-10-09 1976-10-09 tone detector

Publications (2)

Publication Number Publication Date
JPS5346204A true JPS5346204A (en) 1978-04-25
JPS5928103B2 JPS5928103B2 (en) 1984-07-10

Family

ID=14816421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51121647A Expired JPS5928103B2 (en) 1976-10-09 1976-10-09 tone detector

Country Status (1)

Country Link
JP (1) JPS5928103B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0454251Y2 (en) * 1987-04-10 1992-12-21

Also Published As

Publication number Publication date
JPS5928103B2 (en) 1984-07-10

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