JPS6479686A - A/d converter circuit for measuring seismic vibration, crustal alteration or the like - Google Patents
A/d converter circuit for measuring seismic vibration, crustal alteration or the likeInfo
- Publication number
- JPS6479686A JPS6479686A JP62236148A JP23614887A JPS6479686A JP S6479686 A JPS6479686 A JP S6479686A JP 62236148 A JP62236148 A JP 62236148A JP 23614887 A JP23614887 A JP 23614887A JP S6479686 A JPS6479686 A JP S6479686A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- dac
- adder
- accuracy
- crustal
- 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
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To achieve a rapid improvement in resolutions, by arranging a comparator A/D converter, an adder and the like. CONSTITUTION:D/A conveters DAC-1 and DAC-2 omit lower-order 4 bits from 16 bits of the respective DACs to divide 24 bits into high and low order 12 bits in application. By so doing, the DACs can secure a relative accuracy of 12 bits or more respectively. Finally, a direct accuracy of 24 bits can be obtained by correction utilizing a data table of a CPU along with a higher absolute accuracy. Outputs thus obtained of the DAC-1 and DAC-2 are added up with an adder A and inputted into a comparator CP as 24 bits of analog signal. The output of the adder A remains monotonic as long as the size of the highest order bit of the DAC-2 is not inverted. This enables the maintaining of a monotonic increment characteristic unless the partial potential resistance ratio more than doubles thereby achieving higher resolutions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62236148A JPS6479686A (en) | 1987-09-22 | 1987-09-22 | A/d converter circuit for measuring seismic vibration, crustal alteration or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62236148A JPS6479686A (en) | 1987-09-22 | 1987-09-22 | A/d converter circuit for measuring seismic vibration, crustal alteration or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6479686A true JPS6479686A (en) | 1989-03-24 |
Family
ID=16996467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62236148A Pending JPS6479686A (en) | 1987-09-22 | 1987-09-22 | A/d converter circuit for measuring seismic vibration, crustal alteration or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6479686A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011021720A1 (en) | 2009-08-21 | 2011-02-24 | 帝人株式会社 | Decoration sheet for injection molding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57124932A (en) * | 1981-01-26 | 1982-08-04 | Arupain Kk | Sequential comparison type a-d converter |
| JPS60177287A (en) * | 1984-02-23 | 1985-09-11 | Fujitsu Ltd | Collecting device for earthquake data |
| JPS6112124A (en) * | 1984-06-13 | 1986-01-20 | テクトロニクス・インコーポレイテツド | Analog signal processor |
-
1987
- 1987-09-22 JP JP62236148A patent/JPS6479686A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57124932A (en) * | 1981-01-26 | 1982-08-04 | Arupain Kk | Sequential comparison type a-d converter |
| JPS60177287A (en) * | 1984-02-23 | 1985-09-11 | Fujitsu Ltd | Collecting device for earthquake data |
| JPS6112124A (en) * | 1984-06-13 | 1986-01-20 | テクトロニクス・インコーポレイテツド | Analog signal processor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011021720A1 (en) | 2009-08-21 | 2011-02-24 | 帝人株式会社 | Decoration sheet for injection molding |
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