JPS6449323A - Off-set compensating circuit - Google Patents
Off-set compensating circuitInfo
- Publication number
- JPS6449323A JPS6449323A JP20503187A JP20503187A JPS6449323A JP S6449323 A JPS6449323 A JP S6449323A JP 20503187 A JP20503187 A JP 20503187A JP 20503187 A JP20503187 A JP 20503187A JP S6449323 A JPS6449323 A JP S6449323A
- Authority
- JP
- Japan
- Prior art keywords
- convertor
- positive
- supplied
- filter
- output out
- 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 execute exact oft-set compensation even to an input signal which is not realized in a positive and negative nonsynmmetric waveform or a positive and negative equal probability by adding not only the code bit of digital data but also the amplitude information of an input analog signal as a control signal in an off-set compensating circuit. CONSTITUTION:For an input analog signal IN, only a necessary band component is removed by a filter 4 and supplied to an A/D convertor 1 and outputted as a digital signal output OUT by this A/D convertor 1. A PWM wave is prepared to correspond to the data of high order side (m) of the digital signal output OUT by a pulse width modulating wave generating means 5. This PWM wave is supplied to an integrator 3 and an off-set correcting voltage VCMP is prepared here. Then, this off-set correcting voltage VCMP is fed-back through the filter 4 and the off-set compensation of the above-mentioned circuit system is executed.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20503187A JPS6449323A (en) | 1987-08-20 | 1987-08-20 | Off-set compensating 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 |
---|---|---|---|
JP20503187A JPS6449323A (en) | 1987-08-20 | 1987-08-20 | Off-set compensating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6449323A true JPS6449323A (en) | 1989-02-23 |
Family
ID=16500292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20503187A Pending JPS6449323A (en) | 1987-08-20 | 1987-08-20 | Off-set compensating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6449323A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH048007A (en) * | 1990-04-26 | 1992-01-13 | Oki Electric Ind Co Ltd | Automatic gain control circuit |
JPH0449531A (en) * | 1990-06-19 | 1992-02-18 | Matsushita Electric Ind Co Ltd | Optical disk servo system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57157627A (en) * | 1981-03-23 | 1982-09-29 | Fujitsu Ltd | Offset compensating system for code converting circuit |
-
1987
- 1987-08-20 JP JP20503187A patent/JPS6449323A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57157627A (en) * | 1981-03-23 | 1982-09-29 | Fujitsu Ltd | Offset compensating system for code converting circuit |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH048007A (en) * | 1990-04-26 | 1992-01-13 | Oki Electric Ind Co Ltd | Automatic gain control circuit |
JPH0449531A (en) * | 1990-06-19 | 1992-02-18 | Matsushita Electric Ind Co Ltd | Optical disk servo system |
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