Dynamic Error Analysis of Operational Amplifier

Because the main parameters of the actual operational amplifier and the ideal operational amplifier are different, this leads to the actual operational amplifier circuit has the dynamic error. When input signals are sinusoidal signal and step signal, by using node voltage analysis method and frequency response method, this paper discusses in detail the dynamic error of operational amplifier circuit due to the fact that open loop DC gain and gain bandwidth product are not infinite.Then one can draw a clear conclusion and the principles for selection of circuit components and parameters, which provide a reference for dynamic error analysis of high precision operational amplifier circuit. It is beneficial to design high precision operational amplifier circuit.