Abstract
Lock‑in amplification involves extracting weak signals from background noise, a process that traditionally utilizes computationally intensive floating‑point operations. Performing these operations on standard microcontrollers frequently causes central processing unit (CPU) saturation. The disclosed system provides a vectorized data pipeline that structures digital signal processing tasks to natively utilize internal hardware multiply‑accumulate instructions within a microcontroller. To bypass runtime floating‑point trigonometry, a pre‑computed integer look‑up table and a phase accumulator generate reference waveforms. Further, a scaling recovery algorithm mathematically restores absolute physical units following high‑speed hardware vector bit‑shifts. Consequently, the disclosed system facilitates real‑time, phase‑sensitive signal extraction on resource‑constrained microcontrollers, decreasing power consumption and physical footprint compared to dedicated traditional dedicated hardware.
Creative Commons License
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Recommended Citation
Cheng, Gary, "Vectorized Pipeline for Real‑Time Lock‑In Amplification on Microcontrollers", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/10303