A Method for Improving Conversion Rate and Accuracy of a Capacitance-to-Digital Converter

[1]L. K. Baxter, Capacitive Sensors Design and Applications. New York: IEEE Press, 1997. Search in Google Scholar

[2]R. Pallas-Areny, J. G. Webster, Sensors and Signal Conditioning. New York: Wiley, 2001. Search in Google Scholar

[3]A. Troiano, E. Pasero, and L. Mesin, ─New system for detecting road ice formation,∥ IEEE Trans. Instrum. Meas., vol. 60, no. 3, pp. 1091-1101, Mar. 2011. Search in Google Scholar

[4]Y. Kim, S. Cho, D. Shin, J. Lee and K. Baek, ─Single chip dual plate capacitive proximity sensor with high noise immunity∥, IEEE Sensors Journal, vol. 14, no. 2, pp. 309-310, Feb. 2014. Search in Google Scholar

[5]B. George, H. Zangl, T. Bretterklieber and G. Brasseur, ─A combined inductive–capacitive proximity sensor for seat occupancy detection∥, IEEE Trans. Instrum. Meas., vol. 59, no. 5, pp. 1463-1470, May 2010. Search in Google Scholar

[6]D. Goeger, M. Blankertz, H. Woern, ─A tactile proximity sensor∥, proc. of IEEE Sensors 2010, pp. 589-594, 1-4 Nov. 2010. Search in Google Scholar

[7]J. Das, S. Dey, S. M. Hossain, Z .M. C. Rittersma, and H. Saha, ─A hygrometer comprising a porous silicon humidity sensor with phase- detection electronics,” IEEE Sensors Journal, vol. 3, no. 4, pp. 414-420, Aug. 2003. Search in Google Scholar

[8]S. C. Bera and H. Mandal, ─A flow measurement technique using a noncontact capacitance-type orifice transducer for a conducting liquid∥, IEEE Trans. Instrum. Meas., vol. 61, no. 9, pp. 2553-2559, Sept. 2012. Search in Google Scholar

[9]W. Q. Yang, ─A self-balancing circuit to measure capacitance and loss conductance for industrial transducer applications,∥ IEEE Trans. Instrum. Meas., vol. 45, no. 6, pp. 955-958, Dec. 1996. Search in Google Scholar

[10]V. J. Kumar, P. Sankaran, and K. S. Rao, ─Measurement of C and tanδ of a capacitor employing PSDs and dual-slope DVMs,∥ IEEE Trans. Instrum. Meas., vol. 52, no. 5, pp. 1588-1592, Oct. 2003. Search in Google Scholar

[11]B. George and V. J. Kumar, ─Analysis of the switched-capacitor dual- slope capacitance-to-digital converter∥, IEEE Trans. Instrum. Meas., vol. 59, no. 5, pp. 997-1006, May. 2010. Search in Google Scholar

[12]24-Bit Capacitance-to-Digital Converter with Temperature Sensor [Online]. Available: http://www.analog.com/static/imported- files/data_sheets/AD7747.pdf Search in Google Scholar

[13]K. Cyril Baby and B. George, ─A capacitive ice layer detection system suitable for autonomous inspection of runways using an ROV,∥ in Robotic and Sensors Environments (ROSE), 2012 IEEE International Symposium on, pp. 127-132, Nov. 2012. Search in Google Scholar

[14]S. C. Bera, H. Mandal, S. Saha and A. Dutta, ─Study of a modified capacitance-type level transducer for any type of liquid,∥ IEEE Trans. Instrum. Meas., vol. 63, no. 3, pp. 641-649, Mar. 2014. Search in Google Scholar

[15]P. Vooka, A. Ranjan and B. George, ─A novel capacitance-to-digital converter for capacitive sensors with AC excitation,∥ in Proc. 19^th IMEKO TC 4 Symposium and 17^th IWADC workshop, pp. 246-249, Jul. 2013. Search in Google Scholar

[16]Application note, 1999, AN017, ─The integrating A/D converter (ICL 7135)∥. [Online]. Available: http://www.intersil.com/content/dam/Intersil/documents/an01/an017.pdf Datasheet, MSP430G2553, Mixed Signal Microcontroller, Dallas, TX: Texas Instruments, 2011. [Online]. Available: http://www.ti.com/lit/ds/symlink/msp430g2553.pdfSearch in Google Scholar