A 23μW digitally controlled pMUT interface circuit for Doppler ultrasound Imaging

A 23μW digitally controlled pMUT interface circuit for Doppler ultrasound Imaging This paper describes the design and implementation of a fully integrated Tx/Rx front-end interface for Doppler Imaging with Piezoelectric Micromachined Ultrasonic Transducer (pMUT). The 4-Level Time Gain Compensation (QL-TGC) readout channel with an integrated biasing bank reduces Rx power with satisfactory noise performance (NF=17) and minimal area. The 65nm CMOS chip occupies 200 × 300 μm and has a total power consumption of 23μW, which is a 4x and 25x improvement over the state-of-art pMUT interface circuits, respectively.