JPS6444130A - A/d converter - Google Patents
A/d converterInfo
- Publication number
- JPS6444130A JPS6444130A JP19985587A JP19985587A JPS6444130A JP S6444130 A JPS6444130 A JP S6444130A JP 19985587 A JP19985587 A JP 19985587A JP 19985587 A JP19985587 A JP 19985587A JP S6444130 A JPS6444130 A JP S6444130A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- integration
- current
- circuit
- comparison level
- 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 eliminate the deterioration in the conversion linearity against the dispersion in the reference voltage, and temperature/power supply voltage fluctuation by giving a correlation to a midpoint potential of an integration type A/D converter of a single power supply, a comparison level potential and an integration current. CONSTITUTION:When a voltage corresponding to an analog signal inputted to a terminal 1 is held in an integration capacitor 66, switches 11, 12 are closed and a constant current is supplied from a constant current circuit 30 to the capacitor 6 and integration is started. Then the voltage of the capacitor 6 is compared with a comparison level from a comparison level generating circuit 10 by comparators 18, 19 an the period till the output of the comparators 18, 19 is inverted is counted by counters 21, 22 to obtain a digital value. In this case, since constant voltage source circuits 8, 9 decides a voltage to be supplied to the circuit 10, a midpoint potential with reference to the output potential of reference power supplies 28 and a voltage supplied to a voltage-current conversion circuit 29 controlling the reference current of the circuit 30, the correlativity is given to the midpoint potential, the comparison level and the integration current.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19985587A JPS6444130A (en) | 1987-08-12 | 1987-08-12 | A/d converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19985587A JPS6444130A (en) | 1987-08-12 | 1987-08-12 | A/d converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6444130A true JPS6444130A (en) | 1989-02-16 |
Family
ID=16414771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19985587A Pending JPS6444130A (en) | 1987-08-12 | 1987-08-12 | A/d converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6444130A (en) |
-
1987
- 1987-08-12 JP JP19985587A patent/JPS6444130A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56126315A (en) | Oscillator | |
ES8702006A1 (en) | Circuit for monitoring the electric current supply of a consumer. | |
JPS6444130A (en) | A/d converter | |
ES8800538A1 (en) | Analog-to-digital converter. | |
JPS6444131A (en) | A/d converter | |
JPS57206929A (en) | Controlling system for maximum output electric power of photoelectric cell | |
JPS55107330A (en) | Digital-analog converter | |
SU1534448A1 (en) | Bipolar source of reference voltage | |
JPS56126303A (en) | Dynamic analog amplifier | |
JPS6444126A (en) | A/d and d/a converter | |
JPS6445093A (en) | Dimmer | |
JPS6419417A (en) | Constant voltage source circuit | |
SU983677A1 (en) | Reference supply source | |
SU1425810A1 (en) | Arrangement for temperature compensation for failures of absolute values of slope of voltage-to-current converters | |
JPS6471320A (en) | Delay circuit | |
JPS56147515A (en) | Voltage controlled type oscillator | |
JPS6444516A (en) | Power supply circuit | |
JPS6449322A (en) | A/d and d/a converting circuit | |
JPS5516512A (en) | Coding circuit | |
JPS57194379A (en) | Timer circuit | |
JPS57171832A (en) | Double integration analog-to-digital converter | |
JPS6444124A (en) | A/d and d/a converter | |
JPS6488992A (en) | Semiconductor integrated circuit | |
JPS6444129A (en) | A/d converter | |
JPS57173204A (en) | Power supplying circuit for amplifying element |