ADAPTS: A Comprehensive Circuit/Timing Simulation Strategy for Integrated Circuits

目前正在研制一种分段线性电路时序仿真器，该仿真器在集总电路的近似暂态分析中具有鲁棒性和有效性。为了更好地模拟高度非线性的双极和双极电路，研究人员正在探索一种使用分段线性而不是分段常数表近似来模拟非线性器件特性的仿真策略。电感与电容是等量计算的。在寻求可能达到稳态的瞬态响应之前，通过明确地求解稳态解的条件，使稳态解的计算更加有效。因此，电路仿真只能用于获得连续的稳态条件，而不能用于中间瞬态时间点。为了保持瞬态模拟计算效率，使用了允许利用时间和空间延迟的显式集成策略。为了保证显式积分近似的稳定性，采用计算出的稳态条件来限制步长。这是为了克服僵硬的系统问题。上述策略都体现在SPECS（电子电路和系统仿真程序）软件中。

Rohrer A piecewise linear circuit timing simulator that is robust and efficient in the approximate transient analysis of lumped circuits is being developed. To better simulate the highly nonlinear bipolar and biMOS circuits, a simulation strategy to work with piecewise linear rather than piecewise constant table approximations of nonlinear device characteristics is being explored. Inductance is being included on an equal basis with capacitance. The steady state solution computation is being made more efficient by solving for its conditions explicitly, prior to seeking the transient response that may attain it. Thus, circuit simulation is to be invoked only to obtain successive steady state conditions, but not for intermediate transient time points. To maintain transient simulation computational efficiency, explicit integration strategies that allow the exploitation of both temporal and spatial latency are being used. To insure the stability of explicit integration approximations, the computed steady state conditions are being employed to limit step size. This is intended to overcome the stiff systems problem. The above strategies are being embodied in the SPECS (Simulation Program for Electronic Circuits and Systems) software.