A Robust Adaptive Power Line Interference Canceller VLSI Architecture and ASIC for Multichannel Biopotential Recording Applications. Keshtkaran, M. & Yang, Z. IEEE Transactions on Circuits and Systems II: Express Briefs, 2014.
A Robust Adaptive Power Line Interference Canceller VLSI Architecture and ASIC for Multichannel Biopotential Recording Applications [pdf]Paper  doi  abstract   bibtex   
This brief presents the VLSI architecture and ASIC of a robust algorithm for removing power line interference in multichannel biopotential recording. When compared with three similar interference removal methods, the proposed algorithm outperforms in terms of robustness, and interference rejection performance. The proposed VLSI architecture is scalable with respect to number of channels and/or harmonics. Further performance optimization is obtained through pipelining and resource sharing techniques. A prototype was implemented in a 65-nm CMOS process, and validated against a golden model. Measurement results on different types of signal modalities show an average signal-to-noise ratio (SNR) improvement of 31 dB for input SNRs of -20–20 dB and line frequencies of 45–65 Hz.

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