JPS5698935A - Analog-digital converter - Google Patents
Analog-digital converterInfo
- Publication number
- JPS5698935A JPS5698935A JP116480A JP116480A JPS5698935A JP S5698935 A JPS5698935 A JP S5698935A JP 116480 A JP116480 A JP 116480A JP 116480 A JP116480 A JP 116480A JP S5698935 A JPS5698935 A JP S5698935A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- comparator
- switches
- zero
- discrimination
- 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
Links
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE: To enable to obtain the discrimination with a good accuracy with a simple constitution, by operating a voltage comparator with a good accuracy condition near zero potential, for the discrimination near the minimum bit required for the accuracy as the voltage comparator.
CONSTITUTION: The analog quantity Vi aplied to a terminal 1 is charged in a storage capacitor 41 through switches 42, 43 conducted at the time T1. The switches 42, 43 are nonconductive at the time T2 and the voltage Vi is stored between the terminals of the capacitor 41. Next, a digital control circuit 5 controls the output voltage VD so that it is zero for the monopolar D/A converter. When the switches 44, 46 are conductive, the voltave Vi is applied to the input terminal of the voltage comparator 4. In this case, the conduction/nonconduction of the switches 44∼47 is controlled from the circuit 5 with the result of discrimination of the comparator 4. Thus, the polarity of the input voltage Vc of the comparator 4 is inverted with the polarity switching circuit 2 and the polarity is negative when the voltage VD is zero. Thus, the point when the voltage Vc is zero with approximation can be taken as the A/D conversion end point of the voltage Vi.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP116480A JPS5698935A (en) | 1980-01-09 | 1980-01-09 | Analog-digital converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP116480A JPS5698935A (en) | 1980-01-09 | 1980-01-09 | Analog-digital converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5698935A true JPS5698935A (en) | 1981-08-08 |
JPS6217899B2 JPS6217899B2 (en) | 1987-04-20 |
Family
ID=11493791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP116480A Granted JPS5698935A (en) | 1980-01-09 | 1980-01-09 | Analog-digital converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5698935A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60218923A (en) * | 1984-03-16 | 1985-11-01 | アルカテル・エヌ・ブイ | Switched capacitance feedback control circuit and sigma delta converter using same |
JPH0312533U (en) * | 1985-08-13 | 1991-02-07 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4974868A (en) * | 1972-11-20 | 1974-07-19 |
-
1980
- 1980-01-09 JP JP116480A patent/JPS5698935A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4974868A (en) * | 1972-11-20 | 1974-07-19 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60218923A (en) * | 1984-03-16 | 1985-11-01 | アルカテル・エヌ・ブイ | Switched capacitance feedback control circuit and sigma delta converter using same |
JPH0312533U (en) * | 1985-08-13 | 1991-02-07 |
Also Published As
Publication number | Publication date |
---|---|
JPS6217899B2 (en) | 1987-04-20 |
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