JPS56110373A - Tone signal detector - Google Patents

Tone signal detector

Info

Publication number
JPS56110373A
JPS56110373A JP1313080A JP1313080A JPS56110373A JP S56110373 A JPS56110373 A JP S56110373A JP 1313080 A JP1313080 A JP 1313080A JP 1313080 A JP1313080 A JP 1313080A JP S56110373 A JPS56110373 A JP S56110373A
Authority
JP
Japan
Prior art keywords
frequency
tone signal
circuit
signal
measuring
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
JP1313080A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0253984B2 (enrdf_load_stackoverflow
Inventor
Shigeru Kimura
Tatsunori Kato
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.)
Nippon Telegraph and Telephone Corp
Panasonic Mobile Communications Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Matsushita Communication Industrial 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 Nippon Telegraph and Telephone Corp, Matsushita Communication Industrial Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1313080A priority Critical patent/JPS56110373A/ja
Publication of JPS56110373A publication Critical patent/JPS56110373A/ja
Publication of JPH0253984B2 publication Critical patent/JPH0253984B2/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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
JP1313080A 1980-02-05 1980-02-05 Tone signal detector Granted JPS56110373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1313080A JPS56110373A (en) 1980-02-05 1980-02-05 Tone signal detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1313080A JPS56110373A (en) 1980-02-05 1980-02-05 Tone signal detector

Publications (2)

Publication Number Publication Date
JPS56110373A true JPS56110373A (en) 1981-09-01
JPH0253984B2 JPH0253984B2 (enrdf_load_stackoverflow) 1990-11-20

Family

ID=11824566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1313080A Granted JPS56110373A (en) 1980-02-05 1980-02-05 Tone signal detector

Country Status (1)

Country Link
JP (1) JPS56110373A (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49129082A (enrdf_load_stackoverflow) * 1973-04-20 1974-12-10
JPS5450214A (en) * 1977-09-28 1979-04-20 Fujitsu Ltd Synchronizing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49129082A (enrdf_load_stackoverflow) * 1973-04-20 1974-12-10
JPS5450214A (en) * 1977-09-28 1979-04-20 Fujitsu Ltd Synchronizing system

Also Published As

Publication number Publication date
JPH0253984B2 (enrdf_load_stackoverflow) 1990-11-20

Similar Documents

Publication Publication Date Title
ES8206935A1 (es) Circuito de control de onda de senal
JPS6453623A (en) Pulse detecting circuit employing amplitude and time recognition
JPS6457391A (en) Sensor and method for detecting changes in number of object
SE8009085L (sv) Datadetektionskrets for ett tasi-system
KR890015607A (ko) 주파수 검출기
JPS56110373A (en) Tone signal detector
JPS57179657A (en) Inspecting device for acoustic emission
JPS5722576A (en) Ultrasonic type vehicle speed measuring apparatus
JPS57100362A (en) Ultrasonic wave measuring device
JPS5654120A (en) Amplitude discriminating circuit for magnetic recorder
JPS5694248A (en) Detector for foreign matter on surface
JPS56160665A (en) Corona detecting device for electric equipment
JPS56135108A (en) Processing of output signal from detector
JPS5781721A (en) Pulse input detector
JPS5777907A (en) Surface flaw detector
JPS53144240A (en) Signal detection circuit
JPS5764128A (en) Loose parts monitor
JPS56137266A (en) Automatic detector for magnetic abnormality
JPS5372560A (en) Binary coded circuit
JPS52125388A (en) Defect inspection apparatus
JPS5796267A (en) Percent level detection circuit
JPS6460222A (en) Carrier relay signal noise detection
JPS5497466A (en) Waveform discriminating device
JPS57178115A (en) Knocking detector
JPS5716366A (en) Frequency abnormality detector