Title :
A low power low niose AFE with continuous time self-calibration filters for ECG monitor and heart beat detection
Author :
Jiali Hou ; Weibo Hu ; Ke Lin ; Bo Wang ; Chaoxun Wang ; Mo Wang ; Kai Xu ; Xin´an Wang
Author_Institution :
Shenzhen Grad. Sch., Sch. of ECE, Peking Univ., Shenzhen, China
Abstract :
A low-power low-noise analog front end (AFE) circuit is presented for ECG monitor and QRS feature extraction. For the purpose of low power and small chip area, a 1st-order high pass filter with tunable pseudo-resistor and small capacitor is proposed, and a low pass Gm-C filter using capacitance scaler technique is adopted. A novel calibration circuit is proposed to calibrate the cut-off frequency of the low-pass filter which is sensitive to PVT. The AFE consumes 10μW and input-referred integrated noise in the signal band is 6μVrms.
Keywords :
analogue circuits; electrocardiography; high-pass filters; low-pass filters; low-power electronics; 1st-order high pass filter; ECG monitor; PVT; QRS feature extraction; calibration circuit; capacitance scaler; continuous time self-calibration filters; heart beat detection; input-referred integrated noise; low pass filter; low power low niose analog front end; power 10 muW; Abstracts; Biomedical monitoring; Calibration; Feature extraction; Gain measurement; Logic gates; Monitoring;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4799-3296-2
DOI :
10.1109/ICSICT.2014.7021551