A 0.7V 17fJ/Step-FOMW178.1dB-FOMSNDR10kHz-BW 560mVPPTrue-ExG Biopotential Acquisition System with Parasitic-Insensitive 421MΩ Input Impedance in 0.18m CMOS

Abstract

Insights derived from epidemiological studies on the ExG (ECG, EEG, ENG, etc.) biopotentials can shed light on the underlying mechanisms of several chronic health conditions. A true biopotential acquisition system needs to have a noise floor <100nV/VHz, bandwidth up to 10kHz and input impedance >100MΩ to be able to cover the entire ExG spectrum (Fig. 20.3.1(a)). Also input range >100mVPP is needed to avoid saturation in the presence of stimulation/motion artifacts. SNDR >80dB is needed to support ENG acquisition.