Synthesis of analog ASICs using optimization in conjunction with circuit simulation techniques

A description is given of the optimization methodology applied by the PRECISE computer program for the synthesis of analog ASICs. The application of simulation and optimization technology allows engineers to determine easily and automatically the element values and geometries needed to reach desired or measured analog circuit performance. The integration of both technologies to determine the optimum design parameters necessary to reach circuit objectives specified by the designer is described. Optimization in AC, DC, and transient domains can occur simultaneously to account for the interdependencies of the circuit element value in those domains. In addition, the optimization process can take place in discrete and constrained design parameter space so that the technological limits are accounted for and the optimal drawn lengths and widths are manufacturable. The optimization approach can be a powerful tool for the design of analog ASICs