Pole-Zero Analysis of Multi-Stage Amplifiers and Low Dropout (LDO) Regulators

Yu Sen Xu; Wei Hu; Feng Ying Huang; Ji Wei Huang; Hong Bo She

doi:10.4028/www.scientific.net/AMR.816-817.1085

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 816-817Pole-Zero Analysis of Multi-Stage Amplifiers and...

Pole-Zero Analysis of Multi-Stage Amplifiers and Low Dropout (LDO) Regulators

Abstract:

The objective of this paper is to provide tutorial treatment of the steps for analyzing poles and zeros in multi-stage amplifiers and low dropout (LDO) regulators. The steps can be easily all done by hand simplification without lacking for accuracy, and divided into two methods depending on whether Miller effect exists or not. A two-stage Simple Miller Compensation (SMC) amplifier and an output capacitor-less regulator are analyzed in detail, and several multi-stage amplifiers reported in the literature are also included. To this end, Cadence Spectre simulations are performed to compare hand-computed pole/zero locations with AC analysis.

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Periodical:

Advanced Materials Research (Volumes 816-817)

Pages:

1085-1089

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.816-817.1085

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Online since:

September 2013

Authors:

Yu Sen Xu, Wei Hu, Feng Ying Huang, Ji Wei Huang, Hong Bo She

Keywords:

Multi-Stage Amplifiers, Output Capacitor-Less LDO, Pole-Zero Analysis, Transfer Function

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