JPS56119545A - Data transmission device - Google Patents

Data transmission device

Info

Publication number
JPS56119545A
JPS56119545A JP2246680A JP2246680A JPS56119545A JP S56119545 A JPS56119545 A JP S56119545A JP 2246680 A JP2246680 A JP 2246680A JP 2246680 A JP2246680 A JP 2246680A JP S56119545 A JPS56119545 A JP S56119545A
Authority
JP
Japan
Prior art keywords
signal
analogue signal
converted
frequency
converting
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
JP2246680A
Other languages
Japanese (ja)
Inventor
Yoshio Ogushi
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 JP2246680A priority Critical patent/JPS56119545A/en
Publication of JPS56119545A publication Critical patent/JPS56119545A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • H04L5/08—Channels characterised by the type of signal the signals being represented by different frequencies each combination of signals in different channels being represented by a fixed frequency

Abstract

PURPOSE:To make the device small-sized and lightweight and reduce the cost, without necessary synchronization by converting the input data signal to an analogue signal and by converting this analogue signal to the FM modulation wave of a frequency corresponding to this analogue signal, in the multiplex data transmission device. CONSTITUTION:The 6-channel input data signal is converted to an analogue signal corresponding to the arrangement of respective parallel input data signals by D/A converting circuit 7 of transmission part 50 and the frequency is converted to the FM modulation wave of a sine wave or a square wave corresponding to the analogue signal level by voltage-frequency converting circuit 8 and is transmitted. After this FM modulation wave is converted to an analogue signal by frequency- voltage converting circuit 9 in receiving part 60, it is converted to a 6-channel parallel data signal in A/D converting circuit 10 by the clock signal from clock signal generating circuit 11. Consequently, synchronization between the transmission part and the receiving part is unnecessary.
JP2246680A 1980-02-25 1980-02-25 Data transmission device Pending JPS56119545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2246680A JPS56119545A (en) 1980-02-25 1980-02-25 Data transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2246680A JPS56119545A (en) 1980-02-25 1980-02-25 Data transmission device

Publications (1)

Publication Number Publication Date
JPS56119545A true JPS56119545A (en) 1981-09-19

Family

ID=12083475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2246680A Pending JPS56119545A (en) 1980-02-25 1980-02-25 Data transmission device

Country Status (1)

Country Link
JP (1) JPS56119545A (en)

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