JPS55143863A - Detecting circuit for ratio of noise to digital signal - Google Patents
Detecting circuit for ratio of noise to digital signalInfo
- Publication number
- JPS55143863A JPS55143863A JP5123479A JP5123479A JPS55143863A JP S55143863 A JPS55143863 A JP S55143863A JP 5123479 A JP5123479 A JP 5123479A JP 5123479 A JP5123479 A JP 5123479A JP S55143863 A JPS55143863 A JP S55143863A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- becomes
- input
- circuit
- time position
- 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
- 230000003111 delayed effect Effects 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Dc Digital Transmission (AREA)
Abstract
PURPOSE:To make it possible to detect entirely S/N by a digital circuit, by discriminating the detection output in a time position, where the code error is minimum, and a time position shifted from the time position above and by comparing discrimination results. CONSTITUTION:Detection signal (a) (oblique lines are jitter) input to terminal 301 is divided into two, and one is input to FF304 and is discriminated by rise of discrimination pulse (b) from terminal 305 to output signal (c). The other is delayed by 302 and becomes signal (d) delayed by time Td and is input to FF303 and is discriminated by rise of discrimination pulse (b) to output signal (e). When jitter exists in signal (d), the signal shown by the dotted line of signal (e) is gaken out. Outputs of two FFs are compared with each other by exclusive OR circuit 306 to output signal (f). Signal (f) becomes as shown by the solid line for no error, and becomes as shown by the dotted line for error. Since this circuit is constituted with digital circuits entirely, it can be made an IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5123479A JPS55143863A (en) | 1979-04-25 | 1979-04-25 | Detecting circuit for ratio of noise to digital signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5123479A JPS55143863A (en) | 1979-04-25 | 1979-04-25 | Detecting circuit for ratio of noise to digital signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55143863A true JPS55143863A (en) | 1980-11-10 |
Family
ID=12881247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5123479A Pending JPS55143863A (en) | 1979-04-25 | 1979-04-25 | Detecting circuit for ratio of noise to digital signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55143863A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53120310A (en) * | 1977-03-30 | 1978-10-20 | Hitachi Ltd | Reception system for start-stop signal |
-
1979
- 1979-04-25 JP JP5123479A patent/JPS55143863A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53120310A (en) * | 1977-03-30 | 1978-10-20 | Hitachi Ltd | Reception system for start-stop signal |
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