匹配设计是线性集成电路设计的关键。为了指明如何进行匹配设计来改进线性集成电路,让我们在本文详细地了解一下现今通常所采用的一些匹配设计技术。匹配设计的概念,在晶体管出现以前很早就有了,在工程技术上可以用一最有效的概念——“对称”来简单地解释匹配设计这一术语。在电子学中最早出现的匹配设计也许是电子管差分放大器,这是一个很成功的电路,几乎每一个灵敏的直流放大器都用它作输入级。晶体管电路的设计者限于成本的考虑,在他们的设计中仅限于使用一或两个匹配对,为了获得匹配良好的两个晶体管(基极-发射极电压的不匹配度为±2毫伏),设计 Matched design is the key to linear integrated circuit design. To show how to make a matching design to improve a linear integrated circuit, let’s take a look at some of the matching design techniques that are commonly used today. The concept of matching design, very long before the advent of transistors, is technically one of the most effective concepts - “symmetry” to simply explain the term matching design. The earliest matched design in electronics may be a tube differential amplifier, a very successful circuit that is used as an input stage by almost every sensitive dc amplifier. Designers of transistor circuits are limited to cost considerations, limiting their design to using only one or two matching pairs. To get well-matched two transistors (base-emitter voltage mismatch of ± 2 mV) ,design