Nano watt power rail-to-rail CMOS amplifier with adaptive biasing circuits for ultralow-power analog LSIs

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Abstract

In this paper, we present a rail-to-rail folded-cascode amplifier (AMP) with adaptive biasing circuits (ABCs). The circuit uses a nano ampere current reference circuit to achieve ultralow-power and ABCs to achieve high-speed operation. The ABCs are based on conventional circuits and modified to be suitable for rail-to-rail operation. The measurement results demonstrated that the AMP with the proposed ABCs can operate with an ultralowpower of 384 nA when the input voltage was 0.9V and achieve high speeds of 0.162V/μs at the rise time and 0.233V/μs at the fall time when the input pulse frequency and the amplitude were 10 kHz and 1.5 Vpp, respectively.

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Ozaki, T., Hirose, T., Tsubaki, K., Kuroki, N., & Numa, M. (2015). Nano watt power rail-to-rail CMOS amplifier with adaptive biasing circuits for ultralow-power analog LSIs. In Japanese Journal of Applied Physics (Vol. 54). Japan Society of Applied Physics. https://doi.org/10.7567/JJAP.54.04DE13

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