JPS6477224A - A/d converting circuit - Google Patents
A/d converting circuitInfo
- Publication number
- JPS6477224A JPS6477224A JP23248887A JP23248887A JPS6477224A JP S6477224 A JPS6477224 A JP S6477224A JP 23248887 A JP23248887 A JP 23248887A JP 23248887 A JP23248887 A JP 23248887A JP S6477224 A JPS6477224 A JP S6477224A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- converting
- vin
- converting circuit
- 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 improve the resolution by adding a signal, which is obtained by A/D-converting an analog input signal and multiplying it by (n), and a signal, which is obtained by amplifying a difference signal n-number of times and A/D-converting it, to convert the input signal to an (l+n)-bit digital signal. CONSTITUTION:An analog input signal VIN is converted to an l-bit digital signal DC1 by an A/D converting circuit 1 and is converted again to an analog signal VIN' by a D/A converting circuit 2. A difference e=VIN-VIN' is amplified n-number of times by an amplifying circuit 5 and is converted to a digital signal DC2 by an A/D converting circuit 3. The digital signal DC1 is multiplied in a multiplying circuit 6 by (n), and the output has (l+n)-number of bits and the value of lower n-number of bits is zero. The output of the multiplying circuit 6 and that of the A/D converting circuit 3 are added by an adding circuit 8 to convert the input signal to an (l+n)-bit digital signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23248887A JPS6477224A (en) | 1987-09-18 | 1987-09-18 | A/d converting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23248887A JPS6477224A (en) | 1987-09-18 | 1987-09-18 | A/d converting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6477224A true JPS6477224A (en) | 1989-03-23 |
Family
ID=16940103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23248887A Pending JPS6477224A (en) | 1987-09-18 | 1987-09-18 | A/d converting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6477224A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0484520A (en) * | 1990-07-26 | 1992-03-17 | Matsushita Electric Ind Co Ltd | A/d converter |
-
1987
- 1987-09-18 JP JP23248887A patent/JPS6477224A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0484520A (en) * | 1990-07-26 | 1992-03-17 | Matsushita Electric Ind Co Ltd | A/d converter |
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