eprintid: 10195902 rev_number: 7 eprint_status: archive userid: 699 dir: disk0/10/19/59/02 datestamp: 2024-08-19 10:30:24 lastmod: 2024-08-19 10:30:24 status_changed: 2024-08-19 10:30:24 type: article metadata_visibility: show sword_depositor: 699 creators_name: Zhang, Yaohua creators_name: Jiang, Dai creators_name: Demosthenous, Andreas title: A High-Voltage Differential SPDT T/R Switch for Ultrasound Systems ispublished: inpress divisions: UCL divisions: B04 divisions: F46 keywords: Bipolar-CMOS-DMOS (BCD), MOSFET switch, high-voltage analog switch, single-pole double-throw switch, transmit/receive switch, ultrasound hand gesture recognition note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: 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 μ 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 Ω on-resistance and − 63 dB off-isolation while occupying a modest area of 289 μ m × 295 μ 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. date: 2024-07-25 date_type: published publisher: Institute of Electrical and Electronics Engineers (IEEE) official_url: https://doi.org/10.1109/tcsi.2024.3426558 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2301666 doi: 10.1109/tcsi.2024.3426558 lyricists_name: Jiang, Dai lyricists_name: Demosthenous, Andreas lyricists_name: Zhang, Yaohua lyricists_id: DJIAN68 lyricists_id: ACDEM08 lyricists_id: YZHAJ10 actors_name: Zhang, Yaohua actors_id: YZHAJ10 actors_role: owner funding_acknowledgements: 899822 [European Union] full_text_status: public publication: IEEE Transactions on Circuits and Systems I: Regular Papers issn: 1549-8328 citation: Zhang, Yaohua; Jiang, Dai; Demosthenous, Andreas; (2024) A High-Voltage Differential SPDT T/R Switch for Ultrasound Systems. IEEE Transactions on Circuits and Systems I: Regular Papers 10.1109/tcsi.2024.3426558 <https://doi.org/10.1109/tcsi.2024.3426558>. (In press). Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10195902/1/FINAL%20VERSION%20%281%29.pdf