Title :
Analog front-end amplifier for ECG applications with feed-forward EOS cancellation
Author :
Chih-Chan Tu ; Tsung-Hsien Lin
Author_Institution :
Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This paper presents a low-noise low-power Instrumentation Amplifier (IA) for ECG applications. Chopped capacitively-coupled IA (CCIA) is built to precisely define the gain and avoid flicker noise. The circuit for electrode offset (EOS) cancellation is implemented in feed-forward (FF) manner with an area-efficient SC integrator. The FF architecture uses less capacitor ratio to define the low HPF corner than the feedback architecture. Implemented in a 0.18-μm process, the circuit draws 4.2 μA from a 1.8 V supply, and occupies 0.63mm2. The total integrated noise from 0.5 to 100Hz is 7.37 μVrms.
Keywords :
biomedical electrodes; biomedical electronics; electrocardiography; electrodes; feedforward; flicker noise; instrumentation amplifiers; low noise amplifiers; low-power electronics; CCIA; ECG applications; EOS; FF architecture; analog front-end amplifier; area-efficient SC integrator; chopped capacitively-coupled IA; current 4.2 muA; electrode offset cancellation; feedforward EOS cancellation; flicker noise avoidance; frequency 0.5 Hz to 100 Hz; low HPF corner; low-noise low-power instrumentation amplifier; size 0.18 mum; voltage 1.8 V; voltage 7.37 muV; 1f noise; Capacitors; Choppers (circuits); DSL; Earth Observing System; Electrocardiography;
Conference_Titel :
VLSI Design, Automation and Test (VLSI-DAT), 2014 International Symposium on
Conference_Location :
Hsinchu
DOI :
10.1109/VLSI-DAT.2014.6834895
