Nonlinear Signal Model with Linear Noise Response for Low Noise Circuits Design

A novel approach for generating nonlinear signal model with accurate noise response is proposed and demonstrated, which is realized with a cascade of a linear noise and a nonlinear signal models. The noise model behaves as a 0 Ohm resistor with arbitrary noise response. The noise response is described by a correlation matrix calculated directly from measured noise data. The noise model can easily be attached to any signal model for achieving dynamically bias dependent noise response. This approach significantly simplifiers the noise model extraction procedure, and can be applied to any device technologies such as HBTs, HEMTs, and MOSFETs.