A 160 mu A Biopotential Acquisition IC With Fully Integrated IA and Motion Artifact Suppression

作者：Van Helleputte Nick^*; Kim Sunyoung; Kim Hyejung; Kim Jong Pal; Van Hoof Chris; Yazicioglu Refet Firat

来源：IEEE Transactions on Biomedical Circuits and Systems, 2012, 6(6): 552-561.

DOI：10.1109/TBCAS.2012.2224113

• Biopotential recording
• electrocardiogram (ECG)
• instrumentation amplifier
• motion artifact reduction

This paper proposes a 3-channel biopotential monitoring ASIC with simultaneous electrode-tissue impedance measurements which allows real-time estimation of motion artifacts on each channel using an an external mu C. The ASIC features a high performance instrumentation amplifier with fully integrated sub-Hz HPF rejecting rail-to-rail electrode-offset voltages. Each readout channel further has a programmable gain amplifier and programmable 4th order low-pass filter. Time-multiplexed 12 b SAR-ADCs are used to convert all the analog data to digital. The ASIC achieves > 115dB of CMRR (at 50/60 Hz), a high input impedance of > 1G Omega and low noise (1.3 mu Vrms in 100 Hz). Unlike traditional methods, the ASIC is capable of actual motion artifact suppression in the analog domain before final amplification. The complete ASIC core operates from 1.2 V with 2 V digital IOs and consumes 200 mu W when all 3 channels are active.

• 出版日期2012-12