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http://dx.doi.org/10.7471/ikeee.2013.17.3.234

The Incremental Delta-Sigma ADC for A Single-Electrode Capacitive Touch Sensor  

Jung, Young-Jae (Dept. of Electronics and Communication Engineering, Hanyang University)
Roh, Jeong-Jin (Dept. of Electronics and Communication Engineering, Hanyang University)
Publication Information
Journal of IKEEE / v.17, no.3, 2013 , pp. 234-240 More about this Journal
Abstract
This paper presents an incremental delta-sigma analog-to-digital converter (ADC) for a single-electrode capacitive touch sensor. The second-order cascade of integrators with distributed feedback (CIFB) delta-sigma modulator with 1-bit quantization was fabricated by a $0.18-{\mu}m$ CMOS process. In order to achieve a wide input range in this incremental delta-sigma analog-to-digital converter, the shielding signal and the digitally controlled offset capacitors are used in front of a converter. This circuit operated at a supply voltage of 2.6 V to 3.7 V, and is suitable for single-electrode capacitive touch sensor for ${\pm}10-pF$ input range with sub-fF resolution.
Keywords
Analog-to-digital converter; capacitive sensor; delta-sigma modulator; single-electrode sensor; switched-capacitor circuit;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 J. Markus, J. Silva, and G.C. Temes, "Theory and applications of incremental delta-sigma converters," IEEE Tran. on Circuits and Systems I, Vol. 51, No. 4, pp. 678-690, Apr. 2004.   DOI   ScienceOn
2 J. Markus, P. Deval, V. Quiquempoix, J. Silva, and G.C. Temes, "Incremental Delta-sigma Structures for DC Measurement : an Overview," IEEE 2006 Custom Integrated Circuits Conference (CICC) .
3 D. J. Allstot, "A precision variable-supply CMOS comparator," IEEE J . Solid-State Circuits, Vol. 17, No. 6, pp. 1080-1087, Dec. 1982.   DOI   ScienceOn
4 R. Gregorian, Introduction to CMOS op-amps and comparators. NewYork : John Wiley & Sons, Inc., 1999.
5 J. Roh, S. Byun, Y. Choi, H. Roh, Y. Kim, and J. Kwon, "A 0.9-V 60-W 1-Bit Fourth-Order Delta-Sigma Modulator With 83-dB Dynamic Range," IEEE J . Solid-State Circuits, Vol. 43, No. 2, pp. 361-370, Feb. 2008.   DOI   ScienceOn
6 B. V. Amini, R. Abdolvand, and F. Ayazi, "A 4.5-mW closed-loop delta-sigma micro-gravity CMOS SOI accelerometer," IEEE J . Solid-State Circuits, Vol. 41, No. 12, pp. 2983-2991, Dec. 2006.   DOI   ScienceOn
7 문대규 "터치 산업 기술 현황 및 전망" Korea Evaluation Institute of Industrial Technology (KEIT) 2012-7호
8 M. Yamada and K. Watanabe, "A capacitive pressure sensor interface using oversampling delta-sigma demodulation techniques," IEEE Trans. Instrum. Meas., Vol. 46, No. 1, pp. 3-7, Feb. 1997.   DOI   ScienceOn
9 L. K. Baxter, Capacitive Sensors, Design and Applications. Piscataway, NJ: IEEE Press, 1997
10 V. Kaajakari, Practical MEMS: Design of Microsystems, Accelerometers, Gyroscopes, RF MEMS, Optical MEMS, and Micrfluidic Systems. NV: Small Gear Publishing, 2009
11 C. Park, K. Jang, S. Woo, and J. Choi, "Design of a High-Resolution Integrating Sigma-Delta ADC for Battery Capacity Measurement" IKEEE, Vol. 16. No. 1, pp. 28-33, Mar. 2012.   과학기술학회마을   DOI   ScienceOn
12 D. Johns and K. Martin, Analog Integrated Circuit Design, John Wiley & Sons, Inc. 1997
13 R. Schreier and G. C. Temes, Understanding Delta-Sigma Data Converters. Piscataway, NJ: IEEE Press, 2005
14 J. M. de la Rosa, "Sigma-delta modulators: tutorial overview, design guide, and state-of-the-art survey," IEEE Trans. on Circuits and Systems-I : Regular Papers, vol. 58, No. 1, pp. 1-21, Jan. 2011.   DOI   ScienceOn
15 S. Rabii and B. A. Wooley, The Design of Low Voltage, Low Power Sigma-Delta Modulators. KAP, 1999.