This letter presents a compact low-noise amplifier designed to be employed in the receiver chain of a low-frequency 2-D piezoelectric micromachined ultrasonic transducers probe for medical ultrasound imaging. The circuit, fabricated in a 160-nm BCDSOI technology, features an ac open-loop voltage gain configuration, and it is bias-regulated with a compact dc control loop. As from electric characterization, it proves to be an interesting alternative with respect to other known topologies since it achieves a significantly better noise efficiency factor than its competitors (displaying only vn,in = 7 nV/√Hz with 0.126 mW power dissipation). Good linearity and power supply rejection ratio performances are ensured as well, thanks to an low-drop-out regulator integrated on-chip.
Novaresi, L., Malcovati, P., Mazzanti, A., Bonizzoni, E., Terenzi, M., Ghisu, D.U., et al. (2025). An Open-Loop LDO-Regulated LNA for PMUT-Based Biomedical Ultrasound Imaging. IEEE SENSORS LETTERS, 9(11), 1-4 [10.1109/lsens.2025.3618291].
An Open-Loop LDO-Regulated LNA for PMUT-Based Biomedical Ultrasound Imaging
Savoia, Alessandro Stuart
2025-01-01
Abstract
This letter presents a compact low-noise amplifier designed to be employed in the receiver chain of a low-frequency 2-D piezoelectric micromachined ultrasonic transducers probe for medical ultrasound imaging. The circuit, fabricated in a 160-nm BCDSOI technology, features an ac open-loop voltage gain configuration, and it is bias-regulated with a compact dc control loop. As from electric characterization, it proves to be an interesting alternative with respect to other known topologies since it achieves a significantly better noise efficiency factor than its competitors (displaying only vn,in = 7 nV/√Hz with 0.126 mW power dissipation). Good linearity and power supply rejection ratio performances are ensured as well, thanks to an low-drop-out regulator integrated on-chip.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
