Details

Autor(en) / Beteiligte

• Sawigun, Chutham
• Thanapitak, Surachoke

Titel

A 0.9-nW, 101-Hz, and 46.3-[Formula Omitted]Vrms IRN Low-Pass Filter for ECG Acquisition Using FVF Biquads

Ist Teil von

• IEEE transactions on very large scale integration (VLSI) systems, 2018-01, Vol.26 (11), p.2290

Ort / Verlag

New York: The Institute of Electrical and Electronics Engineers, Inc. (IEEE)

Erscheinungsjahr

2018

Link zum Volltext

Quelle

IEEE Xplore Digital Library

Beschreibungen/Notizen

• This paper presents a differential fourth-order low-pass filter suitable for electrocardiography (ECG) acquisition. It is formed by cascading two compact and power-efficient biquads operating in the subthreshold region. Each biquad combines two capacitors and a flipped voltage follower circuit. The filter attains a cutoff frequency adjustable to cover the entire range of ECG (150–250 Hz). The filter prototype has been fabricated in a 0.35-[Formula Omitted] CMOS technology. It occupies an area of [Formula Omitted] and operates from a 0.6-V supply. Measurements confirm that the filter consumes 0.9-nW static power for a 101-Hz cutoff frequency and contributes the input-referred noise of 46.27 [Formula Omitted]. For a 60-Hz input frequency, the filter achieves a dynamic range of 47 dB where the third-harmonic distortion of −60 dB is produced. This leads to the figure of merit of [Formula Omitted] J. When the chip area is also concerned, the proposed filter performs comparably to the recent state-of-the-art nanowatt-class low-pass filter.