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.
(In press).
Preview |
Text
FINAL VERSION (1).pdf - Other Download (6MB) | Preview |
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.
| Type: | Article |
|---|---|
| Title: | A High-Voltage Differential SPDT T/R Switch for Ultrasound Systems |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/tcsi.2024.3426558 |
| Publisher version: | https://doi.org/10.1109/tcsi.2024.3426558 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Bipolar-CMOS-DMOS (BCD), MOSFET switch, high-voltage analog switch, single-pole double-throw switch, transmit/receive switch, ultrasound hand gesture recognition |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10195902 |
Archive Staff Only
 |
View Item |
