JPS6449324A - Off-set compensating circuit - Google Patents
Off-set compensating circuitInfo
- Publication number
- JPS6449324A JPS6449324A JP20503287A JP20503287A JPS6449324A JP S6449324 A JPS6449324 A JP S6449324A JP 20503287 A JP20503287 A JP 20503287A JP 20503287 A JP20503287 A JP 20503287A JP S6449324 A JPS6449324 A JP S6449324A
- Authority
- JP
- Japan
- Prior art keywords
- integrator
- convertor
- feedback loop
- digital data
- set adjustment
- 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
Abstract
PURPOSE:To simply and exactly execute off-set adjustment by disconnect the feedback loop of an off-set compensating circuit at the time of the off-set adjustment of an A/D convertor. CONSTITUTION:Between a code detecting means 2 and an integrator 3, which form a feedback loop and between which a circuit system exists to execute off-set compensation, a switching means composed of a switch 5 is provided to disconnect the feedback loop at the time of the off-set adjustment of an A/D convertor 1 and to supply digital data different from the digital data obtained by A/D conversion to the integrator 3. At the time of the off-set adjustment of the A/D convertor 1, the switch 5 is changed-over to a contact (b) side, the feedback loop of the circuit system is disconnected and the other digital data are supplied from a terminal 6 to the integrator 3. An off-set correcting voltage is generated from this integrator 3 based on the other digital data to be supplied to the integrator 3 and the off-set adjustment is executed so that the digital code of an output in the A/D convertor 1 can go to be zero.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205032A JP2552304B2 (en) | 1987-08-20 | 1987-08-20 | Offset compensation circuit |
US07/234,874 US4965867A (en) | 1987-08-20 | 1988-08-22 | Offset compensation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205032A JP2552304B2 (en) | 1987-08-20 | 1987-08-20 | Offset compensation circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6449324A true JPS6449324A (en) | 1989-02-23 |
JP2552304B2 JP2552304B2 (en) | 1996-11-13 |
Family
ID=16500310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62205032A Expired - Lifetime JP2552304B2 (en) | 1987-08-20 | 1987-08-20 | Offset compensation circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2552304B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03101314A (en) * | 1989-09-13 | 1991-04-26 | Eagle Ind Co Ltd | Analog/digital converter |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51128254A (en) * | 1975-04-30 | 1976-11-09 | Mitsubishi Electric Corp | Analog-digital converter |
JPS59153490A (en) * | 1983-02-16 | 1984-09-01 | Sanyo Electric Co Ltd | Electric cleaner |
JPS6029025A (en) * | 1983-07-14 | 1985-02-14 | Toshiba Corp | Offset/drift correcting circuit for analog-digital converter |
JPS62104221A (en) * | 1985-10-30 | 1987-05-14 | Nec Corp | Drift compensation circuit for a/d converter |
JPS637024A (en) * | 1986-06-27 | 1988-01-12 | Fujitsu Ltd | Automatic drift control circuit |
-
1987
- 1987-08-20 JP JP62205032A patent/JP2552304B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51128254A (en) * | 1975-04-30 | 1976-11-09 | Mitsubishi Electric Corp | Analog-digital converter |
JPS59153490A (en) * | 1983-02-16 | 1984-09-01 | Sanyo Electric Co Ltd | Electric cleaner |
JPS6029025A (en) * | 1983-07-14 | 1985-02-14 | Toshiba Corp | Offset/drift correcting circuit for analog-digital converter |
JPS62104221A (en) * | 1985-10-30 | 1987-05-14 | Nec Corp | Drift compensation circuit for a/d converter |
JPS637024A (en) * | 1986-06-27 | 1988-01-12 | Fujitsu Ltd | Automatic drift control circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03101314A (en) * | 1989-09-13 | 1991-04-26 | Eagle Ind Co Ltd | Analog/digital converter |
Also Published As
Publication number | Publication date |
---|---|
JP2552304B2 (en) | 1996-11-13 |
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