Eugene - I agree - my last PLL was Excel to get the control system stuff right, then Verilog AMS for all the blocks, then, single block simulations on test benches, then off to mixed level simulations using the Verilog AMS models in conjunction with the transistor level blocks. -- Jerry
Eugene wrote on Oct 29th, 2007, 10:51pm:For linear analysis, I recommend Excel, Matlab, Mathcad, or Mathematica. You should be able to do the linear analysis without resorting to simulation. An analytic approach is faster, more flexible, and better suited for high powered data visualization (such as an animated 3D root locus). However, I would check my analysis with a behavioral simulation based on VerilogA models. One advantage of a simulator-based approach is that you can bring circuit optimizers to bear on the optimization problem.