⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种功耗仅8µW的异频斩波放大器，用于直接提取2µVrms的神经生物标志物。通过结合斩波稳定和异频信号处理，并利用tanh函数简化偏移校准，解决了相位敏感性问题，实现了低功耗、高精度的神经信号提取。
tanh function [6] so it simplifies offset calibration to suppress distortion while preserving phase information for cross-channel coherence analysis. Both techniques eliminate the phase sensitivity between the neuronal signal and the IC. The power output signal is lowpass filtered to the order of 1Hz to track the essential dynamics of the biomarker. This paper describes a prototype architecture that tracks the power fluctuations in discrete frequency bands for a broad spectrum of neuronal biomarkers. The circuit merges chopper-stabilization with heterodyne signal processing to construct a low-noise amplifier with highly programmable, robust filtering characteristics. The I/Q architecture extends to complex impedance measurement with the addition of 10μA current stimulation injected into the electrodes at the chopper frequency,
Tim Denison1, Wes Santa1, Randy Jensen1, Dave Carlson1,
Gregory Molnar1, Al-Thaddeus Avestruz1,2 1 Medtronic, Columbia Heights, MN, 2MIT, Cambridge, MA stage has its advantages; power extraction is more linear than a