A novel SPICE behavioral macromodel of operational amplifiers including a high accuracy description of frequency characteristics

This paper presents a new method of operational amplifiers SPICE macromodeling, based on a frequency domain description of the input-output transfer functions. It accurately models the frequency variations of the open-loop gain, the common-mode rejection, and the input and output impedances, by a direct specification of their Laplace domain expressions, with all theirs dominant poles and zeros. The temperature dependencies of the main OpAmp´s characteristics and the equivalent input noise are included. The proposed behavioral macromodel leads to a higher computational efficiency in comparison with the existing OpAmp SPICE models, with a higher accuracy and a better convergence