Simulation is a particularly effective way to design and testhigh-frequency circuits. Increasingly powerful computersand the wide use of the circuit simulator, PSpice®, makesimulation with PSpice a practical method to test the variousparameters of a circuit. Good simulation models are essential,however, to achieve realistic results. Burr-Brown nowoffers PSpice models for a number of new RF circuits thatfar exceed the usual simulation standards in scope anddetails. The macromodel for the Diamond Transistor OPA660gives an example of t