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在自动控制系统中,传感器输出的信号一般是十分微弱的(如热电偶、电阻应变片和电荷传感器等),为了满足信号变换的要求(如A/D变换的输入电压要求或V/f变换的输入电压要求),需要将传感器输入信号进行放大。为了保证放大器的精度要求,通常采用失调小、漂移小的高精度运算放大器,自稳零运算放大器往往是首选的运算放大器。 自稳零运算放大器是利用CMOS工艺制作的第四代运算放大器,利用动态校零原理,消除了MOS
In the automatic control system, the sensor output signal is generally very weak (such as thermocouples, resistance strain gauges and charge sensors, etc.), in order to meet the signal conversion requirements (such as A / D conversion of the input voltage requirements or V / f conversion Of the input voltage requirements), the need to amplify the sensor input signal. In order to ensure the accuracy of the amplifier requirements, usually using a small offset, small drift precision op amp, self-zeroing op amp is often the preferred op amp. Self-zeroing operational amplifier is the use of CMOS technology produced fourth-generation operational amplifier, the use of dynamic zero-zero principle, eliminating the MOS