JPS5574239A - Analog/digital converter with check function in fail safe - Google Patents
Analog/digital converter with check function in fail safeInfo
- Publication number
- JPS5574239A JPS5574239A JP14939278A JP14939278A JPS5574239A JP S5574239 A JPS5574239 A JP S5574239A JP 14939278 A JP14939278 A JP 14939278A JP 14939278 A JP14939278 A JP 14939278A JP S5574239 A JPS5574239 A JP S5574239A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- ain
- logical sum
- analog
- comparators
- 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 enable fail safe of check function, by comparing analog input signal and analog signal at the signal comparison and discrimination circuit and checking dynamically whether the comparison result is outputed or not according to the time sequence.
CONSTITUTION: The analog input signal AIN is converted into digital output signal DOUT at the A/D conversion circuit 1. The addition circuits 12 and 13 add the signal AIN and the voltages ΔVH, ΔVL of the correction power supplies 10, 11 and input them to the input terminal B of the comparators 8, 9. The comparator 8 compares the magnitude AIN+ΔVH with AD and the comparator 9 does that of AIN+ ΔVL and AD. If the exclusive logical sum of the comparators 8 and 9 is H and the timing logical sum of the output and the pulse "1" of the frequency dividing 14, it is judged when the exclusive logical sum of the comparators 8 and 9 is L and the timing logical sum of the pulses "0" and "2" of the circuit 5 and the inverting output is H.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14939278A JPS5574239A (en) | 1978-11-30 | 1978-11-30 | Analog/digital converter with check function in fail safe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14939278A JPS5574239A (en) | 1978-11-30 | 1978-11-30 | Analog/digital converter with check function in fail safe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5574239A true JPS5574239A (en) | 1980-06-04 |
Family
ID=15474113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14939278A Pending JPS5574239A (en) | 1978-11-30 | 1978-11-30 | Analog/digital converter with check function in fail safe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5574239A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03268611A (en) * | 1990-03-19 | 1991-11-29 | Nec Corp | Analog/digital converter monitor circuit |
JP2011176438A (en) * | 2010-02-23 | 2011-09-08 | Toshiba Mitsubishi-Electric Industrial System Corp | A/d conversion device |
-
1978
- 1978-11-30 JP JP14939278A patent/JPS5574239A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03268611A (en) * | 1990-03-19 | 1991-11-29 | Nec Corp | Analog/digital converter monitor circuit |
JP2011176438A (en) * | 2010-02-23 | 2011-09-08 | Toshiba Mitsubishi-Electric Industrial System Corp | A/d conversion device |
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