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Chopper stabilized low resistance comparator.
Radojle M Radetic1, Dragan R Milivojevic
1Serbian Transmission System / Nade Dimic 40, 19210 Bor, Serbia;
Sensors (Basel, Switzerland)
|May 11, 2012
Summary
This study enhances the chopper method for precise low resistance measurements by eliminating parasitic voltages. A new comparator prototype achieves extremely high accuracy, demonstrating the feasibility of measuring very low voltages with exceptional precision.
Area of Science:
- Electrical Engineering
- Metrology
Background:
- Parasitic voltages can significantly impede accurate low resistance measurements.
- Existing chopper methods require optimization for enhanced precision.
Purpose of the Study:
- To improve the chopper method for parasitic voltage elimination in low resistance comparisons.
- To design and validate a high-accuracy low resistance comparator prototype.
Main Methods:
- Development of an improved chopper circuit for parasitic voltage suppression.
- Design and construction of a low resistance comparator prototype.
- Experimental validation of the comparator's performance.
Main Results:
- Achieved high accuracy of 0.08 ppm over 1,000 measurement attempts.
- Demonstrated the capability to measure extremely low voltages.
- Identified and addressed critical design challenges for improved performance.
Conclusions:
- The enhanced chopper method effectively eliminates parasitic voltages.
- The developed prototype offers superior accuracy for low resistance measurements.
- The findings pave the way for more precise electrical metrology applications.
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