摘要
ymbolic circuit simulator is traditionally applied to the small-signal analysis of analog circuits.This paper establishes a symbolic behavioral macromodeling method applicable to both small-signal and large-signal analysis of general two-stage operational amplifiers(op-amps).The proposed method creates a two-pole parametric macromodel whose parameters are analytical functions of the circuit element parameters generated by a symbolic circuit simulator.A moment matching technique is used in deriving the analytical model parameter.The created parametric behavioral model can be used for op-amps performance simulation in both frequency and time domains.In particular,the parametric models are highly suited for fast statistical simulation of op-amps in the time-domain.Experiment results show that the statistical distributions of the op-amp slew and settling time characterized by the proposed model agree well with the transistor-level results in addition to achieving significant speedup.
Symbolic circuit simulator is traditionally applied to the small-signal analysis of analog circuits. This paper establishes a symbolic behavioral macromodeling method applicable to both small-signal and large-signal analysis of general two-stage operational amplifiers （op-amps）. The proposed method creates a two-pole parametric macromodel whose parameters are analytical functions of the circuit element parameters generated by a symbolic circuit simulator. A moment matching technique is used in deriving the analytical model parameter. The created parametric behavioral model can be used for op-amps performance simulation in both frequency and time domains. In particular, the parametric models are highly suited for fast statistical simulation of op-amps in the time-domain. Experiment results show that the statistical distributions of the op-amp slew and settling time characterized by the proposed model agree well with the transistor-level results in addition to achieving significant speedup.
关键词
运算放大器
统计模拟
宏模型
象征性
小信号分析
模拟电路
行为模型
大信号分析
Index Terms---Analog behavioral model, large-signalanalysis, moment matching, operational amplifiers,process variation, statistical analysis, symbolic analysis.
