JPS55143857A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS55143857A
JPS55143857A JP5183079A JP5183079A JPS55143857A JP S55143857 A JPS55143857 A JP S55143857A JP 5183079 A JP5183079 A JP 5183079A JP 5183079 A JP5183079 A JP 5183079A JP S55143857 A JPS55143857 A JP S55143857A
Authority
JP
Japan
Prior art keywords
bit
time
data
logic
meaning
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
JP5183079A
Other languages
Japanese (ja)
Inventor
Satoru Saito
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP5183079A priority Critical patent/JPS55143857A/en
Publication of JPS55143857A publication Critical patent/JPS55143857A/en
Pending 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
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To improve transmission efficiency without step-out by constituting a one-bit period by the sum of the first time and the second time and by expressing the logic of data with the second time and by inverting the logic of the first time following the second time for the preceding logic. CONSTITUTION:Each bit is constituted by time T1 of the sum of the first half bit of time Ta and the latter half bit of time Tb. The start bit is set to the L level only during time T1, and a meaning as data is not given to bit Ta, and a meaning as data is given to the logical state of bit Tb. Further, the logic is always inverted in respect to delimitation between bit Tb and next first bit Ta. In the receiving side, time 3T/2 from rise or fall of bit Ta to the approximate center of bit Tb is counted by a timer, and the logical state of bit Tb is sampled by this timing. The stop bit is defined as a bit which rises to H during time T1 from the end of data and falls to L during time T1 continuously. As a result, transmission efficiency is improved because it is unnecessary to provide the start bit and the stop bit for every byte.
JP5183079A 1979-04-25 1979-04-25 Data transmission system Pending JPS55143857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5183079A JPS55143857A (en) 1979-04-25 1979-04-25 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5183079A JPS55143857A (en) 1979-04-25 1979-04-25 Data transmission system

Publications (1)

Publication Number Publication Date
JPS55143857A true JPS55143857A (en) 1980-11-10

Family

ID=12897782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5183079A Pending JPS55143857A (en) 1979-04-25 1979-04-25 Data transmission system

Country Status (1)

Country Link
JP (1) JPS55143857A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066542A (en) * 1983-08-31 1985-04-16 ゼネラル　シグナル　コ−ポレ−シヨン Data communication system
JPH01119142A (en) * 1987-10-30 1989-05-11 Daihatsu Motor Co Ltd Serial data transmission system
US7870318B2 (en) 2006-11-02 2011-01-11 Seiko Epson Corporation Asynchronous serial communication method and asynchronous serial communication device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114308A (en) * 1973-02-12 1974-10-31
JPS51134502A (en) * 1975-05-19 1976-11-22 Hitachi Ltd Frame synchronizing system in digital 2- phase modulation
JPS5446458A (en) * 1977-09-19 1979-04-12 Mitsubishi Electric Corp Signal transmitter-receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114308A (en) * 1973-02-12 1974-10-31
JPS51134502A (en) * 1975-05-19 1976-11-22 Hitachi Ltd Frame synchronizing system in digital 2- phase modulation
JPS5446458A (en) * 1977-09-19 1979-04-12 Mitsubishi Electric Corp Signal transmitter-receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066542A (en) * 1983-08-31 1985-04-16 ゼネラル　シグナル　コ−ポレ−シヨン Data communication system
JPH0347788B2 (en) * 1983-08-31 1991-07-22 Gen Signal Corp
JPH01119142A (en) * 1987-10-30 1989-05-11 Daihatsu Motor Co Ltd Serial data transmission system
US7870318B2 (en) 2006-11-02 2011-01-11 Seiko Epson Corporation Asynchronous serial communication method and asynchronous serial communication device

Similar Documents

Publication Publication Date Title
JPS55143857A (en) Data transmission system
JPS5250101A (en) Start-stop synchronism control system
JPS5726930A (en) Odd-number frequency division circuit
ES267205U (en) Disc for aeration of sewage
JPS5413708A (en) Code conversion system
JPS5539421A (en) Signal transmission method for serial data transmission system
JPS5744326A (en) Pulse removing circuit for clock pulse signal
JPS5227250A (en) Oscillating circuit
JPS5753170A (en) Bit discriminating circuit
SU970662A1 (en) Single pulse discriminator
JPS52102666A (en) Timer circuit
JPS53109445A (en) Refresh request signal generating circuit
JPS5744328A (en) Pulse extractor
JPS5386260A (en) Time informing timepiece
JPS5680922A (en) Timing pulse generator
JPS55109029A (en) Pulse waveform shaping circuit
JPS56158959A (en) Digital type frequency discriminator
JPS53108359A (en) Trigger circuit
JPS5635065A (en) Measuring unit of threshold value
JPS53115145A (en) Automatic shift code insertion circuit
JPS5731243A (en) Coder
JPS57169850A (en) Random number generating circuit
JPS57160214A (en) Flip-flop circuit and counter circuit using it
JPS56102158A (en) Memory device of facsimile device
JPS5369698A (en) Bill discriminating apparatus