Architecting Low-Noise Instrumentation Amplifiers for Bio-Potentials

Minimizing thermal noise and baseline wander in continuous clinical ambulatory ECG recording.

Chopper Stabilization and Noise Folding

Chopper-stabilized amplifiers up-modulate DC electrode offset voltages beyond signal frequencies, eliminating 1/f flicker noise and achieving input-referred noise below 0.6 µVrms.

High Common-Mode Rejection (CMRR)

Active right-leg drive (RLD) loops suppress 50/60 Hz powerline interference by over 115 dB, preserving diagnostic ECG wave morphology during unshielded patient walking.

Input impedance greater than 1 Gigaohm preventing electrode drying attenuation
Built-in lead-off detection monitoring impedance changes in real time
Integrated optical drive for dual-wavelength SpO2 and PPG acquisition

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