JPS53138615A - Multi-frequency signal receiving system - Google Patents

Multi-frequency signal receiving system

Info

Publication number
JPS53138615A
JPS53138615A JP5345477A JP5345477A JPS53138615A JP S53138615 A JPS53138615 A JP S53138615A JP 5345477 A JP5345477 A JP 5345477A JP 5345477 A JP5345477 A JP 5345477A JP S53138615 A JPS53138615 A JP S53138615A
Authority
JP
Japan
Prior art keywords
receiving system
signal receiving
frequency signal
circuit
simplify
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
JP5345477A
Other languages
Japanese (ja)
Other versions
JPS5824997B2 (en
Inventor
Koichi Hasegawa
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
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP52053454A priority Critical patent/JPS5824997B2/en
Publication of JPS53138615A publication Critical patent/JPS53138615A/en
Publication of JPS5824997B2 publication Critical patent/JPS5824997B2/en
Expired 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 simplify the design and manufacture of the circuit for the multifrequency signal receiving system to receive the signals of many different frequencies by drawing out the signal output through the combination of the switch circuit and the isolator circuit comprising one kind of the filter.
JP52053454A 1977-05-10 1977-05-10 Multi-frequency signal reception method Expired JPS5824997B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52053454A JPS5824997B2 (en) 1977-05-10 1977-05-10 Multi-frequency signal reception method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52053454A JPS5824997B2 (en) 1977-05-10 1977-05-10 Multi-frequency signal reception method

Publications (2)

Publication Number Publication Date
JPS53138615A true JPS53138615A (en) 1978-12-04
JPS5824997B2 JPS5824997B2 (en) 1983-05-24

Family

ID=12943295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52053454A Expired JPS5824997B2 (en) 1977-05-10 1977-05-10 Multi-frequency signal reception method

Country Status (1)

Country Link
JP (1) JPS5824997B2 (en)

Also Published As

Publication number Publication date
JPS5824997B2 (en) 1983-05-24

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