Advanced Capacitive Sensing for Mobile Devices
This chapter presents an overview of the technology behind capacitive sensing in mobile devices and beyond. Capacitive-sensing systems handle signals from the pF range down to aF. Examples to illustrate this include “single-pixel” buttons, sliders, touch screens, and “kilo-pixel” fingerprint readers.
Challenges and solutions for sensors, architectures, algorithms, and circuit technology are discussed.
The authors would like to thank V. Bharathan, V. Bihday, O. Hoshtanar, O. Kapshii, A. Maharyta, and D. Starr for their various contributions to this chapter.
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