METHODS FOR COMPUTING HARMONIC DISTORTION IN LOW FREQUENCY POWER AMPLIFIER

This paper presents few different methods for computing the nonlinear distortion of an amplifier and compares each other, in order to find the simpler one that gives an acceptable precision. An approximate method for computing the amplifier distortion is introduced. The method is based on the five-point distortion analysis and allows the designer to identify the most important low frequency power amplifier elements from the distortion point of view. This method, implemented as an Excel spreadsheet, considers almost all the dependencies in the circuit and proposes some design strategies that reduces the total harmonic distortion factor