JPS57181226A - Analog-to-digital converter - Google Patents
Analog-to-digital converterInfo
- Publication number
- JPS57181226A JPS57181226A JP6548581A JP6548581A JPS57181226A JP S57181226 A JPS57181226 A JP S57181226A JP 6548581 A JP6548581 A JP 6548581A JP 6548581 A JP6548581 A JP 6548581A JP S57181226 A JPS57181226 A JP S57181226A
- Authority
- JP
- Japan
- Prior art keywords
- comparators
- analog signal
- outputting
- switches
- detects
- 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
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
- H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
- H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
- H03M1/362—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider
- H03M1/365—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider the voltage divider being a single resistor string
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/001—Analogue/digital/analogue conversion
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To reduce the chip area of a parallel A/D converter by obtaining the low-order digit bits by obtaining a local analog signal which corresponds to the high-order digits by 2<n> units of switches, and then finding a difference between a sampled value and the local analog signal. CONSTITUTION:A group of reference voltages and an analog signal are compared mutually by comparators 141-147. Detecting circuits 152-157 find two comparators which output a ''0'' and a ''1''. A detecting circuit 151 detects all the comparators 141-147 outputting ''1''s, and a detector 158 detects all the comparators 141-147 outputting ''0''s. Their detection signals are converted by an encoder 16 into digital signals, which are outputted to output terminals 17. According to those outputs, switches 121-128 operate to lead a prescribed voltage to an output terminal 11.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6548581A JPS57181226A (en) | 1981-04-30 | 1981-04-30 | Analog-to-digital converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6548581A JPS57181226A (en) | 1981-04-30 | 1981-04-30 | Analog-to-digital converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57181226A true JPS57181226A (en) | 1982-11-08 |
JPS6135728B2 JPS6135728B2 (en) | 1986-08-14 |
Family
ID=13288441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6548581A Granted JPS57181226A (en) | 1981-04-30 | 1981-04-30 | Analog-to-digital converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57181226A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6442923A (en) * | 1987-08-10 | 1989-02-15 | Nippon Telegraph & Telephone | Analog/digital conversion circuit |
JPH01202928A (en) * | 1988-02-09 | 1989-08-15 | Matsushita Electric Ind Co Ltd | Parallel a/d converter |
FR2694825A1 (en) * | 1991-06-26 | 1994-02-18 | Lanoix Frantz | Calculator for non boolean arithmetic calculations - uses circuits operating in octal, hexadecimal or decimal modes but not in binary mode |
JPH0690172A (en) * | 1992-09-09 | 1994-03-29 | Seiko Instr Inc | Circuit device and method for a/d conversion |
JPH11274928A (en) * | 1999-02-15 | 1999-10-08 | Seiko Instruments Inc | Analog-to-digital converter circuit device |
-
1981
- 1981-04-30 JP JP6548581A patent/JPS57181226A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6442923A (en) * | 1987-08-10 | 1989-02-15 | Nippon Telegraph & Telephone | Analog/digital conversion circuit |
JPH01202928A (en) * | 1988-02-09 | 1989-08-15 | Matsushita Electric Ind Co Ltd | Parallel a/d converter |
FR2694825A1 (en) * | 1991-06-26 | 1994-02-18 | Lanoix Frantz | Calculator for non boolean arithmetic calculations - uses circuits operating in octal, hexadecimal or decimal modes but not in binary mode |
JPH0690172A (en) * | 1992-09-09 | 1994-03-29 | Seiko Instr Inc | Circuit device and method for a/d conversion |
JPH11274928A (en) * | 1999-02-15 | 1999-10-08 | Seiko Instruments Inc | Analog-to-digital converter circuit device |
Also Published As
Publication number | Publication date |
---|---|
JPS6135728B2 (en) | 1986-08-14 |
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