JPS56123195A - Digital signal conversion system - Google Patents

Digital signal conversion system

Info

Publication number
JPS56123195A
JPS56123195A JP2778180A JP2778180A JPS56123195A JP S56123195 A JPS56123195 A JP S56123195A JP 2778180 A JP2778180 A JP 2778180A JP 2778180 A JP2778180 A JP 2778180A JP S56123195 A JPS56123195 A JP S56123195A
Authority
JP
Japan
Prior art keywords
digital
signal
circuit
digital signal
sampled
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
JP2778180A
Other languages
Japanese (ja)
Other versions
JPS631796B2 (en
Inventor
Akio Kimura
Isao Saito
Takenori Endo
Yoshio Inui
Hiroshi Fujita
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
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP2778180A priority Critical patent/JPS56123195A/en
Publication of JPS56123195A publication Critical patent/JPS56123195A/en
Publication of JPS631796B2 publication Critical patent/JPS631796B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To perform PCM conversion without digital-analog conversion and to miniaturize a converting circuit by sending a digital signal to a PCM circuit from a signal terminal device via a digital-to-digital converter. CONSTITUTION:When received data S is inputted to digital signal converter 34, a modulated digital signal is outputted from modulator DSPS and then converted by digital-to-digital converter DDS into a high frequency signal, which is sampled. This sampled signal is outputted to output terminal Sout of a PCM circuit via a companding encoding circuit. On the other hand, when the received data is inputted to input terminal Rin, it is converted into a high frequency signal after passing through the expanding decoding circuit of digital-to-digital converter DDR, and it is sampled to obtain a digital signal, which is passed through the phase difference detecting circuit in demodulator DSPR to obtain received data R.
JP2778180A 1980-03-05 1980-03-05 Digital signal conversion system Granted JPS56123195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2778180A JPS56123195A (en) 1980-03-05 1980-03-05 Digital signal conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2778180A JPS56123195A (en) 1980-03-05 1980-03-05 Digital signal conversion system

Publications (2)

Publication Number Publication Date
JPS56123195A true JPS56123195A (en) 1981-09-28
JPS631796B2 JPS631796B2 (en) 1988-01-14

Family

ID=12230509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2778180A Granted JPS56123195A (en) 1980-03-05 1980-03-05 Digital signal conversion system

Country Status (1)

Country Link
JP (1) JPS56123195A (en)

Also Published As

Publication number Publication date
JPS631796B2 (en) 1988-01-14

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