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

Rohrer正在开发一种分段线性电路时序模拟器，它在集中电路的近似暂态分析中是健壮和有效的。为了更好地模拟高度非线性的双极型和BiMOS电路，正在探索一种使用分段线性而不是分段常量表近似的非线性器件特性的模拟策略。电感与电容是在同等基础上计入的。在寻求可能达到稳态解的暂态响应之前，通过显式地求解其条件，使稳态解的计算变得更加有效。因此，仅为了获得连续的稳态条件而调用电路仿真，而不是针对中间的瞬变时间点。为了保持暂态模拟的计算效率，使用了允许利用时间和空间延迟的显式积分策略。为了确保显式积分近似的稳定性，计算的稳态条件被用来限制步长。这是为了克服僵化的系统问题。上述策略体现在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.