%0 Generic
%A Zhang, Y
%A Jiang, D
%A Demosthenous, A
%C Singapore
%D 2024
%F discovery:10195904
%I IEEE
%K CMOS integrated circuit, human-machine interface, PMUT, SPDT switch, T/R switch, ultrasound hand gesture recognition
%T A Differential SPDT T/R Switch for PMUT Biomedical Ultrasound Systems
%U https://discovery.ucl.ac.uk/id/eprint/10195904/
%V 2024
%X This paper presents a differential T/R SPDT switch, designed in a 0.18 μm HV BCD technology for PMUTbased biomedical ultrasound systems. It incorporates a bootstrapping technique to pass high-voltage pulses and a shunt branch for improved isolation. The differential T/R switch is designed to interface with bimorph electrodes although a singleended version can also interface with conventional PZT/CMUT transducers. Post-layout simulation results show that the switch circuit exhibits 64 Ω on-resistance and -62 dB off-isolation. A figure-of-merit is proposed to compare ultrasound T/R switches. To the best of the authors' knowledge, this differential switch is the first of its kind being reported for PMUT biomedical ultrasound systems.
%Z This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.