An Ultrasound-Powering TX with Standing-Wave Peak Tracking Employing Adiabatic Power Sensing Achieving 82% Power-Tracking Accuracy and &lt;90ms Settling Time for Brain Implants

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An Ultrasound-Powering TX with Standing-Wave Peak Tracking Employing Adiabatic Power Sensing Achieving 82% Power-Tracking Accuracy and <90ms Settling Time for Brain Implants

Conference Paper (2026)

Author(s)

Marios Gourdouparis (TU Delft - Bio-Electronics)

Chengyao Shi (IMEC Nederland)

Jiang Liu (TU Delft - Electrical Engineering, Mathematics and Computer Science)

Yuming He (IMEC Nederland)

Stefano Stanzione (IMEC Nederland)

Wouter Serdijn (TU Delft - Bio-Electronics)

Yao Hong Liu (TU Delft - Bio-Electronics)

Research Group

Bio-Electronics

DOI related publication

https://doi.org/10.1109/ISSCC49663.2026.11409335 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:45489a48-ec3e-436b-8a99-56936d66651b

More Info

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Publication Year

2026

Language

English

Research Group

Bio-Electronics

Pages (from-to)

70-72

Publisher

IEEE

ISBN (electronic)

9798331589363

Event

2026 IEEE International Solid-State Circuits Conference, ISSCC 2026 (2026-02-15 - 2026-02-19), San Francisco, United States

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Abstract

An ultrasound powering TX ASIC for brain implants with autonomous on-chip standing-wave peak tracking for RX power (PDL) regulation is presented. With a proposed adiabatic power-sensing scheme, the TX consumes 43μW for power tracking, and the system achieves a settling time of <90ms while using the standing-wave peak-tracking FSM. The TX can achieve PDL improvement of up to 2.7× with a power-tracking accuracy of 82%.

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