JPS54124611A - Communication unit - Google Patents

Communication unit

Info

Publication number
JPS54124611A
JPS54124611A JP3191878A JP3191878A JPS54124611A JP S54124611 A JPS54124611 A JP S54124611A JP 3191878 A JP3191878 A JP 3191878A JP 3191878 A JP3191878 A JP 3191878A JP S54124611 A JPS54124611 A JP S54124611A
Authority
JP
Japan
Prior art keywords
value
speed
pulse
becomes
increased
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
JP3191878A
Other languages
Japanese (ja)
Other versions
JPS6058616B2 (en
Inventor
Toshihiro Shikama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP53031918A priority Critical patent/JPS6058616B2/en
Publication of JPS54124611A publication Critical patent/JPS54124611A/en
Publication of JPS6058616B2 publication Critical patent/JPS6058616B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0262—Arrangements for detecting the data rate of an incoming signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Communication Control (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To make it possible to perform communication synchronously with the communication speed of the other party by detecting automatically the speed of the other party by a communication unit when the other party performs communication in any speed and switching the speed of clocks of a digital phase synchronizing circuit. CONSTITUTION:Though value 31 of reversible counter 17 is set to 4 at t1, value 31 is increased by 1 by the pulse of frequency divider output 29 and becomes 5 at t2, and value 31 is reduced by 1 by the pulse of change point detector circuit output 16 and becomes 4 at t3. After that, this value is increased or reduced; however, increment is larger than reduction and value 31 of reversible counter 17 is increased with time elapse because the frequency of pulses of frequency divider output 29 is larger than the frequency of pulses of change point detector circuit output 16. The value of reversible counter 17 becomes 7 at t4 by the pulse of frequency divider output 29, and a carry pulse is generated at t5 to reset the value to 4, and simultaneously, 1 is added to pointer 24 to switch clocks.
JP53031918A 1978-03-20 1978-03-20 Communication device Expired JPS6058616B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53031918A JPS6058616B2 (en) 1978-03-20 1978-03-20 Communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53031918A JPS6058616B2 (en) 1978-03-20 1978-03-20 Communication device

Publications (2)

Publication Number Publication Date
JPS54124611A true JPS54124611A (en) 1979-09-27
JPS6058616B2 JPS6058616B2 (en) 1985-12-20

Family

ID=12344346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53031918A Expired JPS6058616B2 (en) 1978-03-20 1978-03-20 Communication device

Country Status (1)

Country Link
JP (1) JPS6058616B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147386A (en) * 1984-12-21 1986-07-05 Tokyo Tatsuno Co Ltd Ic card reader/writer
JPS63107329A (en) * 1986-10-24 1988-05-12 Fujitsu Ltd Communication speed automatic detection system
US6704290B1 (en) 1999-03-31 2004-03-09 Nec Corporation Transmission device and transmission method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6235016U (en) * 1985-08-12 1987-03-02

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147386A (en) * 1984-12-21 1986-07-05 Tokyo Tatsuno Co Ltd Ic card reader/writer
JPH0438030B2 (en) * 1984-12-21 1992-06-23 Tokyo Tatsuno Kk
JPS63107329A (en) * 1986-10-24 1988-05-12 Fujitsu Ltd Communication speed automatic detection system
US6704290B1 (en) 1999-03-31 2004-03-09 Nec Corporation Transmission device and transmission method

Also Published As

Publication number Publication date
JPS6058616B2 (en) 1985-12-20

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