JPH0253984B2 - - Google Patents

Info

Publication number
JPH0253984B2
JPH0253984B2 JP55013130A JP1313080A JPH0253984B2 JP H0253984 B2 JPH0253984 B2 JP H0253984B2 JP 55013130 A JP55013130 A JP 55013130A JP 1313080 A JP1313080 A JP 1313080A JP H0253984 B2 JPH0253984 B2 JP H0253984B2
Authority
JP
Japan
Prior art keywords
frequency
circuit
signal
counter
output
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.)
Expired - Lifetime
Application number
JP55013130A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56110373A (en
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 JPS56110373A (en) 1981-09-01
JPH0253984B2 true JPH0253984B2 (pm) 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 (pm)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5513200B2 (pm) * 1973-04-20 1980-04-07
JPS5450214A (en) * 1977-09-28 1979-04-20 Fujitsu Ltd Synchronizing system

Also Published As

Publication number Publication date
JPS56110373A (en) 1981-09-01

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