System Simulation Through Behavioral Model with Embedded Equation Solver for the Prediction of the Linearized Power Amplifier Performances at the Design Stage
A methodology for the prediction of the linearization capabilities of Power Amplifiers (PA) at the early design stage is presented. It is based on the simulation of the power amplifier at a system level, drastically reducing the simulation time for the calculation of the linearized behavior. Initially, the in-house behavioral model of the power amplifier is extracted from data provided by a circuit-level harmonic-balance simulation. The linearized performance of the PA is then obtained from a simulation at system level with a Digital PreDistorter (DPD) and an amplifier behavioral model with its internal equation solver dedicated to data-flow simulations.
The methodology has been successfully validated through its application to a wideband class-AB power amplifier operating at 2 GHz.