JPS52130218A - Multi frequency signal transmission circuit - Google Patents

Multi frequency signal transmission circuit

Info

Publication number
JPS52130218A
JPS52130218A JP4654476A JP4654476A JPS52130218A JP S52130218 A JPS52130218 A JP S52130218A JP 4654476 A JP4654476 A JP 4654476A JP 4654476 A JP4654476 A JP 4654476A JP S52130218 A JPS52130218 A JP S52130218A
Authority
JP
Japan
Prior art keywords
signal transmission
frequency signal
multi frequency
transmission circuit
oscillators
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.)
Pending
Application number
JP4654476A
Other languages
Japanese (ja)
Inventor
Tetsuo Takeshita
Kenichi Hanabe
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP4654476A priority Critical patent/JPS52130218A/en
Publication of JPS52130218A publication Critical patent/JPS52130218A/en
Pending 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)

Abstract

PURPOSE:To enable the multi frequency signal transmission system with long life and economically from the standpoint of entire aspects, by compensating the lowering in economy due to the hybrid transformer, oscillators, and amplifiers.
JP4654476A 1976-04-26 1976-04-26 Multi frequency signal transmission circuit Pending JPS52130218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4654476A JPS52130218A (en) 1976-04-26 1976-04-26 Multi frequency signal transmission circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4654476A JPS52130218A (en) 1976-04-26 1976-04-26 Multi frequency signal transmission circuit

Publications (1)

Publication Number Publication Date
JPS52130218A true JPS52130218A (en) 1977-11-01

Family

ID=12750238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4654476A Pending JPS52130218A (en) 1976-04-26 1976-04-26 Multi frequency signal transmission circuit

Country Status (1)

Country Link
JP (1) JPS52130218A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818665A (en) * 1984-03-14 1989-04-04 Canon Kabushiki Kaisha Medium and process for image formation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818665A (en) * 1984-03-14 1989-04-04 Canon Kabushiki Kaisha Medium and process for image formation
US5006446A (en) * 1984-03-14 1991-04-09 Canon Kabushiki Kaisha Medium and process for image formation

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