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Capacitive sensors can be used by biologists, chemists, and medical professionals to detect the presence of specific molecules, or foreign bodies. Using an electrode array with specific surface preparation, and monitoring the capacitive change relative to a control array, one can determine if the molecules of interest are present in the medium. Due to the small size and potentially low concentration...
This paper presents a new time-mode duty-cycle-modulation-based high accuracy temperature sensor. Different from the well-known ΣΔADC based read-out structure, this temperature sensor's architecture utilizes a temperature-dependent oscillator to convert the temperature information into temperature related time-mode parameter, which means that the large power consumption of ΣΔADCs can be mitigated...
A temperature compensated 1.5 GHz FBAR-based frequency reference implemented in a 0.35 mum CMOS process is presented. The ultra-small form factor and low power dissipation of a temperature compensated FBAR oscillator presents a promising alternative for replacement of quartz crystal frequency references. The measured frequency post-compensation drift over a 0-100degC temperature range is <20 ppm...
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