JPS6347184B2 - - Google Patents

Info

Publication number
JPS6347184B2
JPS6347184B2 JP56057659A JP5765981A JPS6347184B2 JP S6347184 B2 JPS6347184 B2 JP S6347184B2 JP 56057659 A JP56057659 A JP 56057659A JP 5765981 A JP5765981 A JP 5765981A JP S6347184 B2 JPS6347184 B2 JP S6347184B2
Authority
JP
Japan
Prior art keywords
signal
circuit
frequencies
output
frequency
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
Application number
JP56057659A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57171870A (en
Inventor
Takashi Hatano
Yasunori Ogawa
Masatoshi Kumagai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56057659A priority Critical patent/JPS57171870A/ja
Publication of JPS57171870A publication Critical patent/JPS57171870A/ja
Publication of JPS6347184B2 publication Critical patent/JPS6347184B2/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
    • H04Q1/45—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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
JP56057659A 1981-04-16 1981-04-16 Signal deciding circuit for digital multifrequency signal receiver Granted JPS57171870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56057659A JPS57171870A (en) 1981-04-16 1981-04-16 Signal deciding circuit for digital multifrequency signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057659A JPS57171870A (en) 1981-04-16 1981-04-16 Signal deciding circuit for digital multifrequency signal receiver

Publications (2)

Publication Number Publication Date
JPS57171870A JPS57171870A (en) 1982-10-22
JPS6347184B2 true JPS6347184B2 (fr) 1988-09-20

Family

ID=13062019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057659A Granted JPS57171870A (en) 1981-04-16 1981-04-16 Signal deciding circuit for digital multifrequency signal receiver

Country Status (1)

Country Link
JP (1) JPS57171870A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0393180U (fr) * 1989-09-21 1991-09-24

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125188A (ja) * 1982-12-30 1984-07-19 Fujitsu Ltd デイジタル多周波信号受信方式

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1342904A (en) * 1970-07-31 1974-01-10 Plessey Telecommunications Res Multifrequency data receivers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1342904A (en) * 1970-07-31 1974-01-10 Plessey Telecommunications Res Multifrequency data receivers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0393180U (fr) * 1989-09-21 1991-09-24

Also Published As

Publication number Publication date
JPS57171870A (en) 1982-10-22

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