This paper proposes a 2.2 noise efficiency factor (NEF) instrumentation amplifier for neural recording applications. A parametric amplifier based on the MOS C-V characteristic is designed as a pre-amplifier stage, lowering the input referred noise of the following stages by 3.4×. Sampling noise is minimized by oversampling the input signal and switching power is reduced by adopting an 8-phase soft-charging technique.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8910781 | PMC |
http://dx.doi.org/10.1109/vlsic.2018.8502432 | DOI Listing |
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