TY - GEN
T1 - Fully Integrated Ultrasound Power Receiver for Multi-Piezo Implants with Random Phase Offset
AU - Kumar, Limitha
AU - Du, Sijun
AU - Muratore, Dante G.
N1 - Green Open Access added to TU Delft Institutional Repository as part of the Taverne amendment. More information about this copyright law amendment can be found at https://www.openaccess.nl. Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
PY - 2025
Y1 - 2025
N2 - A single transmitter source can power multiple ultrasound piezoelectric transducers to enhance the harvested power; however, the received ultrasonic signals vary in phase and amplitude across each element. This paper introduces a fully integrated, high-frequency SSHC rectifier tailored for miniaturized multi-piezo implants to efficiently harvest power at variable phase offsets with a compact form factor. The design incorporates a novel phase-splicing flipping capacitor-sharing technique between all four ultrasound piezoelectric transducers to improve area efficiency. The proposed 4-stage SSHC rectifier can harvest 5.94x more power than a full bridge rectifier operating at a high ultrasonic excitation frequency of 780 kHz. The proposed system was designed using 180-nm BCD process technology for a 2x2 piezoelectric transducer array, with each element featuring an internal capacitor (CP) of 63.7pF.
AB - A single transmitter source can power multiple ultrasound piezoelectric transducers to enhance the harvested power; however, the received ultrasonic signals vary in phase and amplitude across each element. This paper introduces a fully integrated, high-frequency SSHC rectifier tailored for miniaturized multi-piezo implants to efficiently harvest power at variable phase offsets with a compact form factor. The design incorporates a novel phase-splicing flipping capacitor-sharing technique between all four ultrasound piezoelectric transducers to improve area efficiency. The proposed 4-stage SSHC rectifier can harvest 5.94x more power than a full bridge rectifier operating at a high ultrasonic excitation frequency of 780 kHz. The proposed system was designed using 180-nm BCD process technology for a 2x2 piezoelectric transducer array, with each element featuring an internal capacitor (CP) of 63.7pF.
KW - Implantable Medical Devices (IMDs)
KW - Multi-Piezo implants
KW - Synchronized switch harvesting on Capacitors (SSHC)
KW - Ultrasound piezoelectric transducers (US-PT)
UR - https://www.scopus.com/pages/publications/105010612971
U2 - 10.1109/ISCAS56072.2025.11043231
DO - 10.1109/ISCAS56072.2025.11043231
M3 - Conference contribution
AN - SCOPUS:105010612971
SN - 979-8-3503-5684-7
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
BT - Proceedings of the 2025 IEEE International Symposium on Circuits and Systems (ISCAS)
PB - IEEE
CY - Piscataway
T2 - 2025 IEEE International Symposium on Circuits and Systems, ISCAS 2025
Y2 - 25 May 2025 through 28 May 2025
ER -