A 17.4-b Delta-Sigma Capacitance-to-Digital Converter for One-Terminal Capacitive Sensors
- Title
- A 17.4-b Delta-Sigma Capacitance-to-Digital Converter for One-Terminal Capacitive Sensors
- Author
- 노정진
- Keywords
- Capacitance-to-digital converter (CDC); delta-sigma modulation; one-terminal capacitive sensor
- Issue Date
- 2017-10
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Citation
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v. 64, No. 10, Page. 1122-1126
- Abstract
- In this brief, we present a capacitance-to-digital converter (CDC) for one-terminal capacitive sensors. The designed CDC implements a digital correction technique to reduce non-idealities and noises, such as the offset, 1/f noise, and power supply noise. This correction technique can also minimize effectively the complexity of the analog front-end circuit. All sensor functions, including analog circuits (delta-sigma CDC, bandgap reference, and voltage regulator) and digital logics (microprocessor, memories, and interface logics), are integrated into a single chip and occupy approximately 90% of the area. The chip is fabricated in a 0.18-mu m standard CMOS process, which does not have a deep n-well stage. The analog and digital circuits, including the digital input/output pads, must share the same substrate in this design. However, the measurement results demonstrate highly effective resolutions of 16 to 17.4 b, which are achieved with different conversion times.
- URI
- https://ieeexplore.ieee.org/document/7347369/https://repository.hanyang.ac.kr/handle/20.500.11754/72507
- ISSN
- 1549-7747; 1558-3791
- DOI
- 10.1109/TCSII.2015.2505960
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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