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High-resolution sigma-delta ADCs are gaining significant interest in ultra-low-power medical applications, where accurate measurement of low-frequency and weak electrophysiological signals is required. Operational transconductance amplifiers (OTA) are the key analog component and the most power-hungry part of the sigma-delta (ΣA) modulators. This paper presents a study of OTAs for ultra-low-power...
The purpose of this study was to compare nine WAIS-R short forms in estimating the Full Scale IQs among a group of adults (n = 26) who had sustained moderate to severe traumatic brain injuries. The short forms ranged from two to seven WAIS-R subtests. Significant correlations were obtained between FSIQ and all nine short forms (range = .85 to .94). The majority of the IQ estimates fell within five...
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