Circuit Modeling and Simulation Based on VHDL-AMS

In the progress of product researching and developing, it is very necessary that the founding of virtual prototype. In the phase of circuit simulation, there is a big problem in system simulation, which is the absence of SPICE model of mixed- signal. While solving the problem, the self-making device model is very powerful to finish the 'Top-down' simulation by the advantage of VHDL-AMS language. To find the advantage of the VHDL-AMS language for analog system, this modeling method is also effective to describe the mixed-signal system's structure and action.