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本文要介绍的这个改进型反相/同相电压放大器电路,具有高输入阻抗、低输出阻抗,对输入失调(电压或电流)和温度变化敏感度低,抗干扰性强等优点,因而它的工作稳定性好。在仪器、仪表和测量系统中将有极其广泛的用途。(一)电路构成及其分析改进型反相/同相电压放大器由 A_1和 A_2两个运算放大器组成,如下图所示。
The improved inverting / in-phase voltage amplifier circuit described in this paper has the advantages of high input impedance, low output impedance, low sensitivity to input offset (voltage or current) and temperature variations, and strong immunity to interference and so its operation Good stability. There will be a very wide range of uses in instrumentation, instrumentation and measurement systems. (A) of the circuit and its analysis Improved inverter / phase voltage amplifier A_1 and A_2 by the two op amps, as shown below.