JPS5746557A - Automatic line speed detecting device - Google Patents
Automatic line speed detecting deviceInfo
- Publication number
- JPS5746557A JPS5746557A JP55121971A JP12197180A JPS5746557A JP S5746557 A JPS5746557 A JP S5746557A JP 55121971 A JP55121971 A JP 55121971A JP 12197180 A JP12197180 A JP 12197180A JP S5746557 A JPS5746557 A JP S5746557A
- Authority
- JP
- Japan
- Prior art keywords
- line speed
- sampling
- specific pattern
- detecting device
- speed detecting
- 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
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0262—Arrangements for detecting the data rate of an incoming signal
Abstract
PURPOSE:To detect the line speed automatically, by sampling input data by plural optional sampling periods corresponding to the line speed and by comparing and collating the sampling results with a specific pattern and by detecting the line speed on a basis of the sampling period for coincidence. CONSTITUTION:The input of a specific pattern inputted to an input terminal 10 is inputted to sampling circuits 20-2n having sampling periods for every line speed and is sampled from the middle point of the start bit for start-stop synchronization by set periods respectively. Sampling results are stored in registers 30-3n and are compared and collated with the specific pattern of a register 40 by a comparing and collating circuit 50; and only when they coincide with each other, the output is applied to a display register, and the line speed is detected on a basis of this result.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55121971A JPS5746557A (en) | 1980-09-03 | 1980-09-03 | Automatic line speed detecting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55121971A JPS5746557A (en) | 1980-09-03 | 1980-09-03 | Automatic line speed detecting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5746557A true JPS5746557A (en) | 1982-03-17 |
Family
ID=14824391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55121971A Pending JPS5746557A (en) | 1980-09-03 | 1980-09-03 | Automatic line speed detecting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5746557A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995001032A1 (en) * | 1993-06-18 | 1995-01-05 | Qualcomm Incorporated | Method and apparatus for determining the data rate of a received signal |
-
1980
- 1980-09-03 JP JP55121971A patent/JPS5746557A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995001032A1 (en) * | 1993-06-18 | 1995-01-05 | Qualcomm Incorporated | Method and apparatus for determining the data rate of a received signal |
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