JPS5460544A - Correcting method for electric signal distortion - Google Patents
Correcting method for electric signal distortionInfo
- Publication number
- JPS5460544A JPS5460544A JP12740777A JP12740777A JPS5460544A JP S5460544 A JPS5460544 A JP S5460544A JP 12740777 A JP12740777 A JP 12740777A JP 12740777 A JP12740777 A JP 12740777A JP S5460544 A JPS5460544 A JP S5460544A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- distortion
- featuring
- frequency
- supplied
- 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
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
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
- H04L25/062—Setting decision thresholds using feedforward techniques only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Filters And Equalizers (AREA)
Abstract
PURPOSE:To correct the distortion of the linearity or the amplitude by using the difference between the corrected signal which is the synchronous signal featuring a constant frequency and the signal obtained by delaying the phase of the corrected signal by about 180 deg.. CONSTITUTION:The corrected signal featuring the distortion is supplied to first LPF1 to remove the high-frequency component or the impulsive noise. Thus, waveform 1 is obtained. Then the cut-off frequency of second LPE3 is set nearly identical to the exciting frequency of the test coil in the eddy current test equipment to obtain output signal 2 featuring about 180 deg. phase difference to the input signal. Singnal 2 is then supplied to one terminal of differential amplifier 2 via voltage adjusting circuit 4. For signals 1 and 2 supplied to amplifier 2, the linear distortion parts (a) and (a)' caused at the switching rise time are removed as the in-phase component. At the same time, the amplitude distortion of the both signals emerge a little bit at the positive and negatice side each and is then removed away. Thus, signal 3 featuring the reduced distortion can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52127407A JPS6046854B2 (en) | 1977-10-24 | 1977-10-24 | How to correct distortion in electrical signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52127407A JPS6046854B2 (en) | 1977-10-24 | 1977-10-24 | How to correct distortion in electrical signals |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5460544A true JPS5460544A (en) | 1979-05-16 |
JPS6046854B2 JPS6046854B2 (en) | 1985-10-18 |
Family
ID=14959208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52127407A Expired JPS6046854B2 (en) | 1977-10-24 | 1977-10-24 | How to correct distortion in electrical signals |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6046854B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61255111A (en) * | 1985-05-08 | 1986-11-12 | Nec Corp | Offset elimination circuit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49131658A (en) * | 1973-04-20 | 1974-12-17 | ||
JPS50140234A (en) * | 1974-04-30 | 1975-11-10 | ||
JPS5249732A (en) * | 1975-10-17 | 1977-04-21 | Matsushita Electric Ind Co Ltd | Comb-shape filter |
-
1977
- 1977-10-24 JP JP52127407A patent/JPS6046854B2/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49131658A (en) * | 1973-04-20 | 1974-12-17 | ||
JPS50140234A (en) * | 1974-04-30 | 1975-11-10 | ||
JPS5249732A (en) * | 1975-10-17 | 1977-04-21 | Matsushita Electric Ind Co Ltd | Comb-shape filter |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61255111A (en) * | 1985-05-08 | 1986-11-12 | Nec Corp | Offset elimination circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6046854B2 (en) | 1985-10-18 |
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