Chip

Wearable computer

Parallel computing

Wireless

Miniaturization

Computer science

Interface (matter)

Bubble

Quantum mechanics

Computer hardware

System on a chip

Engineering

Power (physics)

Telecommunications

Battery (electricity)

Embedded system

Electronic engineering

Electrical engineering

Physics

Maximum bubble pressure method

IEEE Transactions on Biomedical Circuits and Systems

An all-in-one battery powered low-power SoC for measuring multiple vital signs with wearables is proposed. All functionality needed in a typical wearable use case scenario, including dedicated readouts, power management circuitry, digital signal processing and wireless communication (BLE) is integrated in a single die. This high level of integration allows an unprecedented level of miniaturization leading to smaller component count which reduces cost and improves comfort and signal integrity. The SoC includes an ECG, Bio-Impedance and a fully differential PPG readout and can interface with external sensors (like an IMU). In a typical application scenario where all sensor readouts are enabled and key features (like heart rate) are calculated on the chip and streamed over the radio, the SoC consumes only 769 μW from the regulated 1.2 V supply.

A 769 μW Battery-Powered Single-Chip SoC With BLE for Multi-Modal Vital Sign Monitoring Health Patches