JPS5460544A - Correcting method for electric signal distortion - Google Patents

Correcting method for electric signal distortion

Info

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
Application number
JP12740777A
Other languages
Japanese (ja)
Other versions
JPS6046854B2 (en
Inventor
Seiichi Watanabe
Koji Kawamura
Isamu Ichijima
Kazuo Miyagawa
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP52127407A priority Critical patent/JPS6046854B2/en
Publication of JPS5460544A publication Critical patent/JPS5460544A/en
Publication of JPS6046854B2 publication Critical patent/JPS6046854B2/en
Expired 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
    • H04L25/02—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.
JP52127407A 1977-10-24 1977-10-24 How to correct distortion in electrical signals Expired JPS6046854B2 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255111A (en) * 1985-05-08 1986-11-12 Nec Corp Offset elimination circuit

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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