A proposed resistance-to-time converter with switching impulse calibrators for resistive bridge sensors

• Main Authors: Mohammad, Zahangir Alam, Khan, Sheroz, Adam, Ismail, Kadir, Kushairy, Nordin, Anis Nurashikin, Ibrahim, Siti Noorjannah
• Format: Conference or Workshop Item
• Language: English; English
• Published: Institute of Electrical and Electronics Engineers Inc. 2018
• Subjects: TK Electrical engineering. Electronics Nuclear engineering; TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices
• Online Access: http://irep.iium.edu.my/72880/1/72880_4th%20IEEE%20International%20Conference%20on%20Smart%20Instrumentation_complete_new.pdf; http://irep.iium.edu.my/72880/2/72880_4th%20IEEE%20International%20Conference%20on%20Smart%20Instrumentation_scopus.pdf; http://irep.iium.edu.my/72880/; https://ieeexplore.ieee.org/document/8312017

This paper presents a simple resistance-to-time converter. It consists of two voltage comparators, a ramp voltage generator, two logic gates and impulse voltage calibrators. A square-wave generator circuit is suggested in this paper. The design is simple and independent of the OPAMP offset issues. The resulting square-wave is rectified to get its DC equivalent and to a triangular output; the two outputs are applied to a comparator for generating a digital output with duty cycle proportional to a change in resistance upon which is dependent the DC.