A 15-Ch. 0.019 mm2/Ch. 0.43% Gain Mismatch Orthogonal Code Chopping Instrumentation Amplifier SoC for Bio-Signal Acquisition
November 4, 2019
Publication
- A 15-Ch. 0.019 mm2/Ch. 0.43% Gain Mismatch Orthogonal Code Chopping Instrumentation Amplifier SoC for Bio-Signal Acquisition
- November 4, 2019
This paper proposes a 15-Ch. low power, small area, Orthogonal Code Chopping Instrumentation Amplifier (OCCIA). Orthogonal codes directly modulate each channel and merge into a single IA while performing dynamic offset compensation. Digitization-Before-Demodulation (DBD) transmits the combined data directly, which alleviates ripple noise, and completely removes the demodulation and TX encoding overhead from the SoC. The proposed OCCIA SoC in 0.18μm 1P6M CMOS achieves the lowest gain mismatch (0.43%) among recent multi-channel IAs with one of the smallest areas (0.019mm2/ch.) while consuming 1.97μW/ch. and low crosstalk (<- 53.5dB) at 490Hz bandwidth.Researcher /
Author: Jeong Hoan Park, Tao Tang, Lian Zhang, Kian Ann Ng and Jerald Yoo
IEEE Asian Solid-State Circuits Conference, 21-1 (7071); https://onlinelibrary.wiley.com/doi/abs/10.
1002/adma.201805921