This paper presents a simple simplification method to design a multistage amplifier. The simplification procedure is based on a defined criterion which mainly related to ignoring negligible terms. In order to verify the validity and accuracy of the exploited method, a complex four-stage CMOS amplifier is considered. Simplified transfer function and circuit simulator output are compared. According to simulation results obtained from HSPICE circuit simulator and TSMC 0.18 μm CMOS technology, the proposed approach expresses a bitter performance by 1% error. The aim is to propose a preprocessing algorithm. This helps main algorithm to deal with simpler inputs. In this way, a preprocessing algorithm is investigated which reduces CPU time and needed memory to simplify heavy symbolical transfer functions. Since target is analog and mix mode circuit, some circuit-based assumptions are considered.

中文翻译：

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基于符号计算的四级CMOS放大器设计：堆栈比较方法

本文提出了一种简单的简化方法来设计多级放大器。简化程序基于定义的标准，该标准主要与忽略可忽略的术语有关。为了验证所开发方法的有效性和准确性，考虑了一个复杂的四级 CMOS 放大器。比较简化的传递函数和电路模拟器输出。根据从 HSPICE 电路模拟器和 TSMC 0.18 μm CMOS 技术获得的模拟结果，所提出的方法表现出 1% 的误差。目的是提出一种预处理算法。这有助于主算法处理更简单的输入。通过这种方式，研究了一种预处理算法，该算法减少了 CPU 时间和所需的内存，以简化繁重的符号传递函数。由于目标是模拟和混合模式电路，