Symbolic behavioral modeling for slew and settling analysis of operational amplifiers
Symbolic behavioral modeling for slew and settling analysis of operational amplifiers
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DOI：
10.1109/mwscas.2011.6026581
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发表时间：
2011-09
期刊：
影响因子：
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通讯作者：
He Zhang;G. Shi
中科院分区：
文献类型：
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作者：
He Zhang;G. Shi
传统的符号技术用于分析小信号电路的行为。它们不适用于分析运算放大器（op-amp）的大信号瞬态响应。本文将符号主导极点技术与文献中流行的摆率和稳定分析技术相结合，形成了一种符号瞬态分析方法，可用于快速表征运算放大器的时域特性。提出了一种用于压摆和建立特性的统一技术。实验结果表明，该方法可以更准确地计算两级运算放大器的压摆和建立时间，无论是大电流还是小电流设计。
Traditionally symbolic techniques are used for analyzing small-signal circuit behaviors. They are not suitable for analyzing the large-signal transient responses of operational amplifiers (op-amps). This paper combines a symbolic dominant pole technique with a popular slew and settling analysis technique existing in the literature to form a symbolic transient analysis method which can be used for fast characterization of the op-amp behavior in the time-domain. A unified technique for slew and settling characterization is proposed. Experimental results have validated that the proposed method can calculate the slew and settling time of a two-stage op-amp more accurately for both large and small current designs.