TY  - INPR
TI  - A High-Voltage Differential SPDT T/R Switch for Ultrasound Systems
SN  - 1549-8328
Y1  - 2024/07/25/
AV  - public
N2  - An improved bootstrapped circuit topology is proposed for the design of a high-voltage, differential, single-pole double-throw transmit/receive switch for an ultrasound hand gesture recognition system. The differential transmit/receive switch is designed in a 0.18 ? m HV BCD technology. It is intended to interface with bimorph piezoelectric micromachined ultrasonic transducer electrodes, although a single-ended version can also interface with conventional ultrasound transducers. A comprehensive analysis has produced useful insights, namely the dependence of off-isolation on high-voltage input slew rate, and the dependence of common-mode rejection ratio on threshold mismatch and timing misalignment. In addition, an extended model has been developed to predict harmonic distortion through a DMOS transistor. Measured results verify the effectiveness of the design guidelines and switch operation. The switch circuit exhibits 67 ? on-resistance and ? 63 dB off-isolation while occupying a modest area of 289 ? m в 295 ? m. The switch achieved a figure-of-merit with 74% improvement over the state-of-the-art. To the best of the authors? knowledge, this differential switch is the first of its kind reported for piezoelectric micromachined ultrasonic transducer biomedical ultrasound systems.
UR  - https://doi.org/10.1109/tcsi.2024.3426558
ID  - discovery10195902
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
KW  - Bipolar-CMOS-DMOS (BCD)
KW  -  MOSFET switch
KW  -  high-voltage analog switch
KW  -  single-pole double-throw switch
KW  -  transmit/receive switch
KW  -  ultrasound hand gesture recognition
PB  - Institute of Electrical and Electronics Engineers (IEEE)
A1  - Zhang, Yaohua
A1  - Jiang, Dai
A1  - Demosthenous, Andreas
JF  - IEEE Transactions on Circuits and Systems I: Regular Papers
ER  -