JPS5366310A - Tone signal detecting circuit - Google Patents

Tone signal detecting circuit

Info

Publication number
JPS5366310A
JPS5366310A JP14186176A JP14186176A JPS5366310A JP S5366310 A JPS5366310 A JP S5366310A JP 14186176 A JP14186176 A JP 14186176A JP 14186176 A JP14186176 A JP 14186176A JP S5366310 A JPS5366310 A JP S5366310A
Authority
JP
Japan
Prior art keywords
detecting circuit
tone signal
signal detecting
circuit
integration
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
JP14186176A
Other languages
Japanese (ja)
Other versions
JPS6212702B2 (en
Inventor
Koichi Nagata
Yasuhiro Mori
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 JP14186176A priority Critical patent/JPS5366310A/en
Priority to GB47472/77A priority patent/GB1562121A/en
Priority to AU30897/77A priority patent/AU510177B2/en
Priority to DE2752522A priority patent/DE2752522C2/en
Priority to US05/854,967 priority patent/US4127846A/en
Priority to CA291,818A priority patent/CA1089033A/en
Publication of JPS5366310A publication Critical patent/JPS5366310A/en
Publication of JPS6212702B2 publication Critical patent/JPS6212702B2/ja
Granted 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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To make easy the circuit design and integration, and to improve highly the reliability, by using a N-path filter and a digital detecting circuit.
JP14186176A 1976-11-26 1976-11-26 Tone signal detecting circuit Granted JPS5366310A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP14186176A JPS5366310A (en) 1976-11-26 1976-11-26 Tone signal detecting circuit
GB47472/77A GB1562121A (en) 1976-11-26 1977-11-15 Tone signal detecting circuits
AU30897/77A AU510177B2 (en) 1976-11-26 1977-11-23 Tone signal detecting circuit
DE2752522A DE2752522C2 (en) 1976-11-26 1977-11-24 Tunable tone detector
US05/854,967 US4127846A (en) 1976-11-26 1977-11-25 Tone signal detecting circuit
CA291,818A CA1089033A (en) 1976-11-26 1977-11-25 Tone signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14186176A JPS5366310A (en) 1976-11-26 1976-11-26 Tone signal detecting circuit

Publications (2)

Publication Number Publication Date
JPS5366310A true JPS5366310A (en) 1978-06-13
JPS6212702B2 JPS6212702B2 (en) 1987-03-20

Family

ID=15301861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14186176A Granted JPS5366310A (en) 1976-11-26 1976-11-26 Tone signal detecting circuit

Country Status (1)

Country Link
JP (1) JPS5366310A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158009A (en) * 1978-06-03 1979-12-13 Shimoda Gijutsu Kenkyusho Kk Method of chemicals injection construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158009A (en) * 1978-06-03 1979-12-13 Shimoda Gijutsu Kenkyusho Kk Method of chemicals injection construction

Also Published As

Publication number Publication date
JPS6212702B2 (en) 1987-03-20

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