JPS5455155A - Analog-to-digital converter - Google Patents
Analog-to-digital converterInfo
- Publication number
- JPS5455155A JPS5455155A JP12136677A JP12136677A JPS5455155A JP S5455155 A JPS5455155 A JP S5455155A JP 12136677 A JP12136677 A JP 12136677A JP 12136677 A JP12136677 A JP 12136677A JP S5455155 A JPS5455155 A JP S5455155A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- fixed point
- comparator
- reference voltage
- output
- 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
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE: To remove DC drift components by providing a comparator which detects the difference in level between a comparison voltage appearing at any fixed point of a voltage-dividing resistance and a prescribed reference voltage which should appear at the fixed point.
CONSTITUTION: This converter is provided with comparator 21 which receives a comparison voltage at one fixed point P of voltage-dividing resistance group 12 via its lst input terminal and regular reference voltage Vr which should be at fixed point P via its 2nd input terminal, integrator 22 for th smoothing DC-conversion of the output of comparator 21, and bias circuit 23 supplied with the output of integrator 22 as a feedback input. Now, if voltage Vp at fixed point P drifts from reference voltage Vr toward the positive side, bias circuit 23 level-shifts the output voltages of D-A converter 14 i.e. VH and VL to the negative sides wholly
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12136677A JPS5455155A (en) | 1977-10-12 | 1977-10-12 | Analog-to-digital converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12136677A JPS5455155A (en) | 1977-10-12 | 1977-10-12 | Analog-to-digital converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5455155A true JPS5455155A (en) | 1979-05-02 |
Family
ID=14809459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12136677A Pending JPS5455155A (en) | 1977-10-12 | 1977-10-12 | Analog-to-digital converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5455155A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586330U (en) * | 1981-07-06 | 1983-01-17 | 岡谷電機産業株式会社 | illuminated switch |
JPS6457824A (en) * | 1987-08-28 | 1989-03-06 | Hitachi Ltd | Serial/parallel ad converter |
JPH0250523A (en) * | 1988-08-12 | 1990-02-20 | Hitachi Ltd | A/d converting circuit |
-
1977
- 1977-10-12 JP JP12136677A patent/JPS5455155A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586330U (en) * | 1981-07-06 | 1983-01-17 | 岡谷電機産業株式会社 | illuminated switch |
JPS6457824A (en) * | 1987-08-28 | 1989-03-06 | Hitachi Ltd | Serial/parallel ad converter |
JPH0250523A (en) * | 1988-08-12 | 1990-02-20 | Hitachi Ltd | A/d converting circuit |
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