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本文介绍了可编程放大器（ＰＧＡ）在仪表中的几种用途。较祥细地讨论了ＰＧＡ的３种基本组成方法及特点。同时，也指出了提高增益精度的一些措施
This article describes several uses of programmable amplifiers (PGA) in instrumentation. More detailed discussion of the three basic methods of PGA composition and characteristics. At the same time, some measures to improve the gain accuracy are also pointed out