A single-electrode capacitive sensor using incremental delta-sigma architecture

作者：Jung Youngjae; Duan Quanzhen; Roh Jeongjin^*

来源：Analog Integrated Circuits and Signal Processing, 2013, 76(2): 261-265.

DOI：10.1007/s10470-013-0093-z

• Capacitance-to-digital converter
• Delta-sigma modulator
• Capacitive sensor
• Incremental ADC

This paper presents a single-electrode capacitive sensor using a single-bit second-order incremental delta-sigma architecture. In order to achieve high accuracy in this capacitance-to-digital converter (CDC), the shielding signal and the digitally controlled offset capacitors are used in combination with the delta-sigma CDC. The designed sensor is suitable for capacitive transducers for +/- 10 pF input range with sub-fF resolution.

• 出版日期2013-8