A Multi-Sensor and Parallel Processing SoC for Miniaturized Medical Instrumentation

We report <italic>VivoSoC</italic>, a system-on-chip realized in 130-nm CMOS for miniaturized medical instrumentation as used in mobile health devices or implantable telemetry systems for animal experiments. It features six neural stimulation channels and acquisition circuits for 9<inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> electrode-based recordings, 4-channel/32-LED photoplethysmography (PPG), bioimpedance, and temperature. A 34-<inline-formula> <tex-math notation="LaTeX">$\mu \text{W}$ </tex-math></inline-formula>/MHz quad-core processing unit with sophisticated data, power, and clock management techniques enables on-chip feature extraction, which can dramatically reduce transmission or storage data rates in a system—crucial for overall power consumption and exemplarily demonstrated on preliminary work on implantable PPG-based vital signs monitoring.

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