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A 0.3‐V, 2.4‐nW, and 100‐Hz fourth‐order LPF for ECG signal processing
Author(s) -
Rao G. Hanumantha,
P. Sreenivasulu,
S. Rekha,
Bhat M. S.
Publication year - 2020
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2839
Subject(s) - low pass filter , cutoff frequency , cmos , filter (signal processing) , electronic engineering , figure of merit , electrical engineering , voltage , low voltage , signal (programming language) , signal processing , analogue filter , butterworth filter , computer science , high pass filter , engineering , digital filter , digital signal processing , computer vision , programming language
Summary An ultra‐low voltage, low power bulk‐driven voltage follower (VF) is proposed in this paper. Further, it is exploited to design a fourth‐order low‐pass filter (LPF) for electrocardiogram (ECG) signal processing. The filter is designed in UMC 180‐nm CMOS technology and operates with an ultra‐low supply voltage of 0.3 V. It consumes an extremely low power of 2.4 nW for a cutoff frequency of 100 Hz. Results of post‐layout simulation show that the proposed filter provides a dynamic range (DR) of 51.6 dB even from a 0.3‐V supply voltage. The filter achieves a Figure‐of‐merit (FoM) of 4.7 × 10 −15 , which is better than many designs listed in the literature.