Bias Dependence of Noise Correlation in MAGFETs

Fernando C. CastaldoJoao Paulo C. CajueiroCarlos Alberto dos Reis

In this paper, measurement results of noise power spectral density in p-channel split-drain MAGFETs operating under various levels of bias current are presented and discussed. It has been observed that correlation increases for decreasing levels of bias current. For currents below 5µA, noise correlation is higher than 50%, rising rapidly toward total correlation. These results indicate that this type of magnetic sensor can be used for low level detection, contradicting what has been so far mentioned in the literature. Measurements were made for bias current ranging from 2µA to circa 70µA using MAGFETs manufactured in 0.8µm CMOS with geometric aspect ratios of 10µm/10µm, 24µm/24µm and 24µm/30µm. Clique no link abaixo para buscar o texto completo deste trabalho na Web: Buscar na Web

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