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本文主要分析用微处理机控制数据采集系统中放大器零点的自动调整、增益变化的自动校准方法及原理。并介绍一种量程自动控制(切换)电路,该电路中的模拟开关导通电阻不会影响放大器的增益精度。
This paper analyzes the use of microprocessor-controlled data acquisition system automatically adjust the zero point of the amplifier, automatic gain gain calibration method and principle. And describes a range of automatic control (switching) circuit, the analog switch resistance in the circuit will not affect the amplifier gain accuracy.