Abstract
We present a low-power, low complexity, and wide-dynamic-range universal sensor readout circuit that converts the sensing capacitance or resistance changes to digital duty cycles based on pulsewidth modulation (PWM). The readout circuit utilizes a RC-controlled pulse generator and produces pulse signals whose duration width is proportional to the charging time. The circuit is comprised of complementary CMOS circuit that enables the proposed design to consume significantly less power compared with traditional designs. The proposed design is universal and can be configured according to the application requirements. The sensor interface chip is designed and fabricated in TSMC 0.13-μm CMOS technology. The proposed interface achieves 13-aF to 10.7-nF capacitance and 5-Ω to 11.5-MΩ resistance sensing ranges with 60- μW power consumption. The functionality of the full circuit, including circuit analysis, noise analysis and measurement results, has been demonstrated.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
