对工作在深度负反馈状态的运算放大器电路，常采用虚短虚断技术得出的理想参数代替实际参数。

To the operational amplifiers circuits which works at deep negative feedback mode, we adopt ideal parameter deduced form ideal model instead of actual parameter usually.

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为降低运算量和虚模型中的存贮，应适当选取移动间隔，截断误差和移动起点。

The appropriate selections of the moving interval, truncation error and the point of onset is to minimize the computer storage and the number of operations required.

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