JPS55143857A - Data transmission system - Google Patents
Data transmission systemInfo
- 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
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.
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)
| 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)
| 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 |
-
1979
- 1979-04-25 JP JP5183079A patent/JPS55143857A/en active Pending
Patent Citations (3)
| 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)
| 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 |
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