JPS57203322A - Eliminating device of dc component - Google Patents
Eliminating device of dc componentInfo
- Publication number
- JPS57203322A JPS57203322A JP8906681A JP8906681A JPS57203322A JP S57203322 A JPS57203322 A JP S57203322A JP 8906681 A JP8906681 A JP 8906681A JP 8906681 A JP8906681 A JP 8906681A JP S57203322 A JPS57203322 A JP S57203322A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- output
- component
- offset
- subtracting
- 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
Abstract
PURPOSE: To realize the automatic compensation for the offset of an A/D converter, by averaging the digital value obtained through an A/D converter after storage for a prescribed time and then subtracting the above-mentioned digital value.
CONSTITUTION: The sample value digitized by an A/D converter 2 is stored in a memory 3 for a prescribed time and then averaged through an averaging part 4. Then the output of the part 4 is subtracted from the output of the converter 2. In such a way, the output of the part 4 is equal to the output DC component of the converter 2, i.e., the degree of the desired offset adjustment. Accordingly, the output of a subtractor 5 is identical with the signal obtained by subtracting the DC component from the output of the converter 2. Thus the offset of the converter 2 is automatically compensated.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8906681A JPS57203322A (en) | 1981-06-10 | 1981-06-10 | Eliminating device of dc component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8906681A JPS57203322A (en) | 1981-06-10 | 1981-06-10 | Eliminating device of dc component |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57203322A true JPS57203322A (en) | 1982-12-13 |
Family
ID=13960474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8906681A Pending JPS57203322A (en) | 1981-06-10 | 1981-06-10 | Eliminating device of dc component |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57203322A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60145729A (en) * | 1984-01-09 | 1985-08-01 | Matsushita Electric Ind Co Ltd | Signal clamping method |
JPS60194372A (en) * | 1984-03-14 | 1985-10-02 | Fujitsu Ltd | Apparatus for measuring minute voltage |
JPS6178221A (en) * | 1984-09-26 | 1986-04-21 | Matsushita Electric Ind Co Ltd | Clamp circuit |
JPS61166230A (en) * | 1985-01-17 | 1986-07-26 | Sony Corp | Video signal processing circuit |
JPS61292067A (en) * | 1985-06-19 | 1986-12-22 | Mitsubishi Electric Corp | Method for measuring electric energy |
JPS6416024A (en) * | 1987-07-09 | 1989-01-19 | Matsushita Electric Ind Co Ltd | Offset correction type analog/digital converter |
-
1981
- 1981-06-10 JP JP8906681A patent/JPS57203322A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60145729A (en) * | 1984-01-09 | 1985-08-01 | Matsushita Electric Ind Co Ltd | Signal clamping method |
JPS60194372A (en) * | 1984-03-14 | 1985-10-02 | Fujitsu Ltd | Apparatus for measuring minute voltage |
JPS6178221A (en) * | 1984-09-26 | 1986-04-21 | Matsushita Electric Ind Co Ltd | Clamp circuit |
JPS61166230A (en) * | 1985-01-17 | 1986-07-26 | Sony Corp | Video signal processing circuit |
JPS61292067A (en) * | 1985-06-19 | 1986-12-22 | Mitsubishi Electric Corp | Method for measuring electric energy |
JPS6416024A (en) * | 1987-07-09 | 1989-01-19 | Matsushita Electric Ind Co Ltd | Offset correction type analog/digital converter |
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