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Chopper Stabilized Low Resistance Comparator
Serbian Transmission System / Nade Dimic 40, 19210 Bor, Serbia
Mining and Metallurgy Institute, Department of Informatics / Zeleni Bulevar 35, 19210 Bor, Serbia
* Author to whom correspondence should be addressed.
Received: 18 March 2009; in revised form: 6 April 2009 / Accepted: 7 April 2009 / Published: 9 April 2009
Abstract: The paper describes an improvement of the chopper method for elimination of parasitic voltages in a low resistance comparison and measurement procedure. The basic circuit diagram along with a short description of the working principle are presented and the appropriate low resistance comparator prototype was designed and realized. Preliminary examinations confirm the possibility of measuring extremely low voltages. Very high accuracy in resistance comparison and measurement is achieved (0.08 ppm for 1,000 attempts). Some special critical features in the design are discussed and solutions for overcoming the problems are described.
Keywords: Low resistance; measuring; chopper comparator; high accuracy
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Cite This Article
MDPI and ACS Style
Radetic, R.M.; Milivojevic, D.R. Chopper Stabilized Low Resistance Comparator. Sensors 2009, 9, 2491-2497.
Radetic RM, Milivojevic DR. Chopper Stabilized Low Resistance Comparator. Sensors. 2009; 9(4):2491-2497.
Radetic, Radojle M.; Milivojevic, Dragan R. 2009. "Chopper Stabilized Low Resistance Comparator." Sensors 9, no. 4: 2491-2497.