JPS57192126A - Analog-to-digital converting circuit - Google Patents
Analog-to-digital converting circuitInfo
- Publication number
- JPS57192126A JPS57192126A JP7729881A JP7729881A JPS57192126A JP S57192126 A JPS57192126 A JP S57192126A JP 7729881 A JP7729881 A JP 7729881A JP 7729881 A JP7729881 A JP 7729881A JP S57192126 A JPS57192126 A JP S57192126A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- supplied
- voltages
- sets
- comparator
- 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
- H03M1/34—Analogue value compared with reference values
- H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
- H03M1/42—Sequential comparisons in series-connected stages with no change in value of analogue signal
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To remarkably reduce the number of circuit elements, by using n sets of voltage comparators for the generation of n-bit digital output signals. CONSTITUTION:In an n(=4)-bit A/D converting circuit, 2<n>(=16) sets of resistors R1-R16 are provided between a reference voltage and ground, VR-GND in series connection. Voltage dividing voltages V1-V15 generated at each terminal of the resistors R1-R16 are supplied to an analog multiplexer 21. An unknown analog input voltage Ain is supplied to each input terminal at the + side of n(=4)-sets of voltage comparators C1-C4 generating digital output signals D1- D4. Further, to a - side terminal of the comparator C1 generating the signal D1 of the most significant bit, a voltage dividing voltage V8 at the middlemost dividing the voltage VR into two is supplied. To the next comparator C2, a middle voltage V12 out of the voltages V8-V15 or the voltage V4 intermediate among the voltages V1-V8 is supplied in correspondence to the magnitude of the voltage Ain. Similarly, either one of the voltages V2, V6, V10 and V14 is supplied to the comparator C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7729881A JPS57192126A (en) | 1981-05-21 | 1981-05-21 | Analog-to-digital converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7729881A JPS57192126A (en) | 1981-05-21 | 1981-05-21 | Analog-to-digital converting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57192126A true JPS57192126A (en) | 1982-11-26 |
Family
ID=13629980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7729881A Pending JPS57192126A (en) | 1981-05-21 | 1981-05-21 | Analog-to-digital converting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57192126A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119921A (en) * | 1982-12-25 | 1984-07-11 | Toshiba Corp | Analog/digital converter |
| JPS61208317A (en) * | 1985-03-11 | 1986-09-16 | Sharp Corp | Analog-digital converter |
-
1981
- 1981-05-21 JP JP7729881A patent/JPS57192126A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119921A (en) * | 1982-12-25 | 1984-07-11 | Toshiba Corp | Analog/digital converter |
| JPS61208317A (en) * | 1985-03-11 | 1986-09-16 | Sharp Corp | Analog-digital converter |
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