JPS57135521A - High-speed a-d converter - Google Patents
High-speed a-d converterInfo
- Publication number
- JPS57135521A JPS57135521A JP2170181A JP2170181A JPS57135521A JP S57135521 A JPS57135521 A JP S57135521A JP 2170181 A JP2170181 A JP 2170181A JP 2170181 A JP2170181 A JP 2170181A JP S57135521 A JPS57135521 A JP S57135521A
- Authority
- JP
- Japan
- Prior art keywords
- analog
- conversion
- digital
- conversion part
- converter
- 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
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
- H03M1/16—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit with scale factor modification, i.e. by changing the amplification between the steps
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To achieve high-speed conversion without reducing resolution by converting the high-order digits of an analog voltage to be converted from analog to digital by a high-speed A/D converter and by converting the low-order digits from analog to digital by a double integral A/D converter. CONSTITUTION:An analog voltage to be converted, applied from a terminal 1 to an A/D conversion part 6a composed of a high-speed A/D converter, is converted there from analog to digital and the result is stored in a storage part 11 and also set in a D/A conversion part. The conversion part 7 processes the digital value by D/A conversion and supplies the result to an addition part 3. The addition part 3 calculates a differnece between the input analog and this voltage, and outputs a prescribed multiple of the difference. This value is converted from analog to digital with excellent resolution through the double integrating operation of an A/D conversion part 6b to be stored in a storage part 12. Simultaneously, the conversion part 6a sets the output in a conversion part 7. Therefore, the output of the addition part 3 is supplied to an A/D conversion part 6c. Thus, a digital value which consists of the output of the conversion part 6a as the high-order digit and those of the 6b-6f as the low-order digits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2170181A JPS57135521A (en) | 1981-02-16 | 1981-02-16 | High-speed a-d converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2170181A JPS57135521A (en) | 1981-02-16 | 1981-02-16 | High-speed a-d converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57135521A true JPS57135521A (en) | 1982-08-21 |
Family
ID=12062358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2170181A Pending JPS57135521A (en) | 1981-02-16 | 1981-02-16 | High-speed a-d converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57135521A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62285522A (en) * | 1986-05-08 | 1987-12-11 | アールシーエー トムソン ライセンシング コーポレーシヨン | Analog/digital converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4960164A (en) * | 1972-07-31 | 1974-06-11 | ||
| JPS52135657A (en) * | 1976-05-10 | 1977-11-12 | Iwatsu Electric Co Ltd | A/d converter |
-
1981
- 1981-02-16 JP JP2170181A patent/JPS57135521A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4960164A (en) * | 1972-07-31 | 1974-06-11 | ||
| JPS52135657A (en) * | 1976-05-10 | 1977-11-12 | Iwatsu Electric Co Ltd | A/d converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62285522A (en) * | 1986-05-08 | 1987-12-11 | アールシーエー トムソン ライセンシング コーポレーシヨン | Analog/digital converter |
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