An Ultrasound Imaging Front-End System-on-a-Chip with Element-Level Impedance Matching for Acoustic Reflectivity Reduction

This paper presents an ultrasound imaging frontend system-on-a-chip that reduces the acoustic reflectivity of the ultrasound transducer array in a broad bandwidth. It integrates, for the first time, an ultrasound transceiver (HV pulse transmitter and LV analog receiver) and an element-level active capacitive impedance cancellation scheme using an element-level negative impedance converter. The sys...