公开(公告)号：EP1290617A4

公开(公告)日：2004-09-29

申请号：EP01935306

申请日：2001-05-10

申请人： CADENCE DESIGN SYSTEMS INC

发明人： FENG DAN ,  PHILLIPS JOEL R ,  KUNDERT KENNETH

IPC分类号： G06F17/50 ,  G06G7/48 ,  G06F7/60

CPC分类号： G06F17/5036

摘要： A process for performing an improved mixed frequency-time algorithm to simulate responses of a circuit that receives a periodic sample signal and at least one information signal, the process selecting a set of evenly spaced distinct time points (804) and a set of reference time points (806). Each of the reference points is associated with a distinct time point, and a reference time point is a signal period away from its respective distinct time point. The process finds a first set of relationships (808) between the values at the distinct time points and the values at the reference time points, and a second set of relationships (810) between the values at the distinct time points and the values at the reference time points. The first and second set of relationships are combined to establish a system of nonlinear equations in terms of the values at the distinct times only (812). The nonlinear equations are solved to find simulated responses of the circuit in the time domain, and the simulated circuit responses are then converted to a frequency domain (814).