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本文简要介绍了微机测控系统前向通道使用可编程放大器的技术，解决了设计这种系统前向通道的三个关键技术问题：前向通道增益的计算、可编程放大器位数ｎ的确定以及模数转换器位数Ｂ的选择范围，讨论了如何消除放大器零点漂移造成的非线性，并提出可行的测量步骤。
This article briefly introduces the use of programmable amplifiers in the forward channels of microcomputer measurement and control system, and solves the three key technical problems in designing such system forward channels: the calculation of the gain of the forward channel, the determination of the number of programmable amplifiers n, Digital converter B choice of the range, discussed how to eliminate the amplifier zero drift caused by the non-linear, and propose feasible measurement steps.