Inductive Sensing: A Phase Detector IC for Button Replacement in Mobile Devices
This paper describes a 4-channel phase detector based inductive sensing IC targeted at mobile device mechanical button replacement. Salient features include active-drive TX with low EMI sensitivity (<10mV differential drive), interference robustness and scalable performance. First silicon achieves an industry leading combination of performance (0.1μm displacement sensitivity) and power (124μW @100 Hz scan rate). Keywords— Sensors, Inductive Sensing, Resonant Phase Sensing, Mechanical/Virtual Buttons, I/Q Demodulation.
Authors
- E. E. King
- Melisande Kost (ORCID: https://orcid.org/0000-0002-7967-4192)
- Jason Lee Wardlaw
- Zhong You (ORCID: https://orcid.org/0000-0002-5286-7218)
- Xin Zhao (ORCID: https://orcid.org/0000-0002-1276-5858)
- Tejasvi Das (ORCID: https://orcid.org/0000-0003-0173-4682)
- Siddharth Maru
Institutions
- Rochester Institute of Technology (US)
- Cirrus Logic (United States) (US)
Publication Details
- Published
- 2025-05-25
- DOI
- https://doi.org/10.1109/iscas56072.2025.11043299
- Primary Topic
- RFID technology advancements
- Type
- article
- Field-Weighted Citation Impact
- 0.00