Optimum Computer-Aided Design of Hyperabrupt Varactors

This paper presents design computations of the optimum doping profiles that maximise each of the following electrical parameters: Q, VBD and (CR)m of hyperabrupt varactors. Optimum design computations are also carried out for the generalized problem when Q, VBD and (CR)m are considered with equal or unequal weights. A digital simulation of the device characteristics using the computed optimum process parameters is then carried out to verify the optimum solutions and to investigate the sensitivity of the electrical parameters to variations in the technological parameters. The results obtained from the present work represent an important improvement in the device characteristics when compared to the present state of art.