Simplified Modeling of a Multipole Amplifier Using All-Pass Network Functions

Authors:
Yihong Dai;Donald T. Comer;David J. Comer;Darren Korth
Affiliations:
Department of Electrical & Computer Engineering, Brigham Young University, Provo, USA 84602;Department of Electrical & Computer Engineering, Brigham Young University, Provo, USA 84602;Department of Electrical & Computer Engineering, Brigham Young University, Provo, USA 84602;Department of Electrical & Computer Engineering, Brigham Young University, Provo, USA 84602
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2005

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Abstract

This paper presents a system model for the representation of amplifiers that cannot be accurately characterized by a classical two pole transfer function. The effects of higher order poles are modeled by an all-pass function added to the conventional two pole model. The accuracy of the model is demonstrated by comparing the results for a typical CMOS amplifier to those obtained from device level simulations using SPICE. This model can be easily implemented in a standard simulator and is shown to achieve fast simulation time. This model is expected to have application in system level modelling of mixed-signal circuits using conventional SPICE simulators.