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This paper presents experimental data and analyses from the oscillation frequency of CMOS ring oscillators (ROs). The measurements are analyzed in order to separate the coefficient of variation (CV = σ/μ) behavior of both within-die (WID) process variations and Die-to-Die (D2D) process variations. Three different RO's sizes distributed over a total of 96 ROs per chip were measured in 32 different...
Electrograms (EGM) recorded from the surface of the myocardium are becoming more and more accessible. T-wave alternans (TWA) is associated with increased vulnerability to ventricular tachycardia/fibrillation and it occurs before the onset of ventricular arrhythmias. Thus, accurate methodologies for time-varying alternans estimation/detection in EGM are needed. In this paper, we perform a simulation...
It has been shown that computation of atrial fibrillation (AF) electrogram (EGM) indices based on activation times is limited by the accuracy of the activation detector. In this work, a wavelet-based detector is proposed as a method to reliably extract activation time locations from the wavelet decomposition of non-linearly pre-processed bipolar EGM signal. A more classical amplitude adaptive threshold-based...
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