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A chopped vertical Hall sensor for detecting the speed and motion direction of magnetic encoder wheels is presented. It achieves low offset and low noise even in the case of the low intrinsic sensitivity and high voltage dependency of offset common to the vertical Hall devices. It features a combination of spinning and stacking techniques together with mixed sampled and continuous time processing,...
Our understanding of the bias temperature instability (BTI) has been plagued by disagreements related to measurement issues. Although even in the early papers on BTI the existence of recovery was acknowledged and discussed, for unknown reasons this had little impact on the way we used to think about the phenomenon until recently. Even after the re-discovery of recovery, it took a few years until it...
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