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本文采用泰勒级数的一级近似式计算函数值,讨论了采用此式的条件,并用正弦函数为例,说明了求值过程。在备有乘法部件的8080微计算机上,正弦函数14位精度的求值只需约80μS。利用这种方法,本文还构思了新的函数求值部件,这种部件作相同的正弦函数求值执行时间可降到0.5μS 以下。利用这种思想本文还讨论了多功能的函数部件。
In this paper, the first order approximation of Taylor series is used to calculate the function value. The condition of using this formula is discussed. The sine function is used as an example to illustrate the evaluation process. On a 8080 microcomputer equipped with multiplication components, the accuracy of the 14-bit sine function is only about 80 μs. Using this approach, we also devised a new function evaluation component that can perform the same sine function evaluation down to 0.5μS or less. This article also discusses the use of this idea of multi-functional components.