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Acoustic particle manipulation is an emerging technology that uses ultrasonic standing waves to position objects with pressure gradients and acoustic radiation forces. To produce strong standing waves, the transducer and the reflector must be aligned properly such that they are parallel to each other. This can be a difficult process due to the need to visualise the ultrasound waves and as higher frequencies...
This paper describes a switch-capacitor interface and calibration circuit that has been co-integrated with a CMOS humidity sensor to achieve a cost-effective solution for accurate and reliable humidity measurements under wide variation of the operating temperature. The calibration circuit is based on a switched-capacitor front-end, featuring high linearity, insensitivity to temperature, as well as...
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