A. Pretelli, A. Richelli, L. Colalongo, Z. Kovács-Vajna
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Robust design of bandgap voltage references with low EMI susceptibility
This paper addresses an approach to design bandgap voltage references which provides a good trade-off between overall performances and strong immunity to electromagnetic interferences. We investigated two classical topologies of bandgap references. The first circuit exhibits a 1200mV shift for interfering signals in the frequency range of 1MHz-4GHz, while the shift in the modified version of the same architecture is only 6mV. The second circuit exhibits a 300mV shift in the same frequency range while the shift in its modified version is only 20 mV.