A RISC-V Based Medical Implantable SoC for High Voltage and Current Tissue Stimulus

A RISC-V based System on Chip (SoC) for high voltage and current tissue stimulus, targeting implantable medical devices, is presented. The circuit is designed in a 0.18μm HV-CMOS process, including the RISC-V 32RVI based microcontroller core, called Siwa -which includes SPI, UART and GPIO interfaces...

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Bibliographic Details
Published in2020 IEEE 11th Latin American Symposium on Circuits & Systems (LASCAS) pp. 1 - 4
Main Authors Arnaud, A., Miguez, M., Gak, J., Puyol, R., Garcia-Ramirez, R., Solera-Bolanos, E., Castro-Gonzalez, R., Molina-Robles, R., Chacon-Rodriguez, A., Rimolo-Donadio, R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.02.2020
Subjects
biomedical circuits
CMOS HV
current sources
Implantable medical devices
level shiters
RISC-V
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Summary:A RISC-V based System on Chip (SoC) for high voltage and current tissue stimulus, targeting implantable medical devices, is presented. The circuit is designed in a 0.18μm HV-CMOS process, including the RISC-V 32RVI based microcontroller core, called Siwa -which includes SPI, UART and GPIO interfaces, a packet-based bus and memory controller, and 8kB SRAM-, combined with several biological tissue stimulus and sensing circuits. The complete test chip (analog+RISC-V) occupies a 5mm 2 area but only 0.82mm 2 correspond to the RISC-V micro-controller, which operates up to 20MHz, with average energy needs of less than 48 pJ/cycle (3pJ STD), and for which several reliability and safety issues were considered.
ISSN:2473-4667
DOI:10.1109/LASCAS45839.2020.9068969