JPS6230556B2 - - Google Patents

Info

Publication number
JPS6230556B2
JPS6230556B2 JP54104657A JP10465779A JPS6230556B2 JP S6230556 B2 JPS6230556 B2 JP S6230556B2 JP 54104657 A JP54104657 A JP 54104657A JP 10465779 A JP10465779 A JP 10465779A JP S6230556 B2 JPS6230556 B2 JP S6230556B2
Authority
JP
Japan
Prior art keywords
circuit
output
circuits
signal
noise
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
JP54104657A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5628587A (en
Inventor
Hirotsugu Ishikawa
Shinji Yorihiro
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
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP10465779A priority Critical patent/JPS5628587A/ja
Publication of JPS5628587A publication Critical patent/JPS5628587A/ja
Publication of JPS6230556B2 publication Critical patent/JPS6230556B2/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
    • H04Q1/453—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)
JP10465779A 1979-08-17 1979-08-17 Multifrequency signal detection system Granted JPS5628587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10465779A JPS5628587A (en) 1979-08-17 1979-08-17 Multifrequency signal detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10465779A JPS5628587A (en) 1979-08-17 1979-08-17 Multifrequency signal detection system

Publications (2)

Publication Number Publication Date
JPS5628587A JPS5628587A (en) 1981-03-20
JPS6230556B2 true JPS6230556B2 (enrdf_load_stackoverflow) 1987-07-02

Family

ID=14386527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10465779A Granted JPS5628587A (en) 1979-08-17 1979-08-17 Multifrequency signal detection system

Country Status (1)

Country Link
JP (1) JPS5628587A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03202166A (ja) * 1989-12-27 1991-09-03 Alloy Koki Kk 霧化装置および塗装装置

Also Published As

Publication number Publication date
JPS5628587A (en) 1981-03-20

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