A New Approach for CMOS Op-Amp Synthesis

A new approach for CMOS op-amp circuit synthesis has proposed here. The approach is based on the observation that the rst order behavior of a MOS transistor in the saturation region is such that the cost and the constraint functions for this optimization problem can be modeled as convex functions. Second order e ects are then handled by formulating the problem as one of solving a sequence of convex programs. Numerical experiments show that the solutions to the sequence of convex programs converges to the same design point for widely varying initial guesses. This strongly suggests that the approach is capable of determining the globally optimal solution to the problem. Performance of the synthesized op-amps has been veri ed against detailed SPICE simulation for a 1.6 CMOS process.