Apparatus and methods for cell models for timing and power analysis

A system for analyzing a circuit includes a computer. The computer operates on a model of the circuit. The model has an input, an output, and multiple controlled sources. The computer is configured to supply a stimulus to the input of the model of the circuit. The input stimulus has an associated value. Each of the multiple controlled sources has a current value derived from the input value. The computer is also configured to supply a stimulus to the output of the model. The output stimulus has an associated value. The computer is further configured to sweep the values for the input and output stimuli through a two sets of swept values, and to obtain an output current of the model of the circuit as a function of the swept values.