A subthreshold input voltage charge pump based on the well-known cross-coupled voltage doubler and using boosted gate voltages for the transfer switches is presented. A level shifter and some ...

This paper presents air-coupled piezoelectric micromachined ultrasonic transducers (PMUTs) fabricated from single-crystal PZT, enabling very high sound pressure level (SPL) output of 100.3 dB at 33 cm ...

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