JPS57180230A - Analog-to-digital conversion circuit - Google Patents
Analog-to-digital conversion circuitInfo
- Publication number
- JPS57180230A JPS57180230A JP56064265A JP6426581A JPS57180230A JP S57180230 A JPS57180230 A JP S57180230A JP 56064265 A JP56064265 A JP 56064265A JP 6426581 A JP6426581 A JP 6426581A JP S57180230 A JPS57180230 A JP S57180230A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- analog
- converter
- distortion
- adder
- 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
- 238000006243 chemical reaction Methods 0.000 title abstract 2
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
- H03M1/34—Analogue value compared with reference values
- H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To perform A/D conversion without distortion for an analog signal at small signal, by shifting a DC level of an analog input signal from the range of the most significant bit error of a reference D/A converter of a sequential comparison type A/D converter. CONSTITUTION:An analog signal 8 applied to a terminal 17 is added with a DC offset with a DC voltage source 19 at an analog adder 18 to be a signal 22 and inputted to an A/D converter 31. Since the signal 22 does not pass through between error points 12 and 13 of the most significant bit of a reference D/A converter DAC6 of a converter 31, a digital signal 23 without distortion is obtained from an output terminal 32. Since the signal 23 includes the DC component for DC offset added at the adder 18, a digital signal 24 added with a constant digital signal for the DC offset component at a digital adder 20 is obtained. Thus, even when the DAC6 with inaccuracy of the high-order bits is taken as a reference, almost the same dynamic range as that obtained by taking the accurate DAC as a reference can be obtained and an analog signal at small signal can be AD-converted without distortion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56064265A JPS57180230A (en) | 1981-04-30 | 1981-04-30 | Analog-to-digital conversion circuit |
| DE19823215519 DE3215519A1 (en) | 1981-04-27 | 1982-04-26 | Digital/analog converter and/or analog/digital converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56064265A JPS57180230A (en) | 1981-04-30 | 1981-04-30 | Analog-to-digital conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57180230A true JPS57180230A (en) | 1982-11-06 |
Family
ID=13253193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56064265A Pending JPS57180230A (en) | 1981-04-27 | 1981-04-30 | Analog-to-digital conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57180230A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59183525A (en) * | 1983-04-01 | 1984-10-18 | Fujitsu Ltd | Analog-digital converting circuit |
| JPS6076815A (en) * | 1983-10-03 | 1985-05-01 | Asahi Optical Co Ltd | Analog/digital converter |
| JPH0186328U (en) * | 1987-11-26 | 1989-06-07 | ||
| JPH0224642U (en) * | 1988-07-29 | 1990-02-19 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52151552A (en) * | 1976-06-11 | 1977-12-16 | Japan Atomic Energy Res Inst | Method of converting analog to digital |
| JPS5315735A (en) * | 1976-07-28 | 1978-02-14 | Yokogawa Hokushin Electric Corp | Analog-digital converter |
| JPS5434671A (en) * | 1977-08-23 | 1979-03-14 | Nippon Hoso Kyokai <Nhk> | Analog-digital converter |
-
1981
- 1981-04-30 JP JP56064265A patent/JPS57180230A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52151552A (en) * | 1976-06-11 | 1977-12-16 | Japan Atomic Energy Res Inst | Method of converting analog to digital |
| JPS5315735A (en) * | 1976-07-28 | 1978-02-14 | Yokogawa Hokushin Electric Corp | Analog-digital converter |
| JPS5434671A (en) * | 1977-08-23 | 1979-03-14 | Nippon Hoso Kyokai <Nhk> | Analog-digital converter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59183525A (en) * | 1983-04-01 | 1984-10-18 | Fujitsu Ltd | Analog-digital converting circuit |
| JPS6076815A (en) * | 1983-10-03 | 1985-05-01 | Asahi Optical Co Ltd | Analog/digital converter |
| JPH0186328U (en) * | 1987-11-26 | 1989-06-07 | ||
| JPH0224642U (en) * | 1988-07-29 | 1990-02-19 |
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