关键词:
Common mode rejection, linear characteristics, nonlinear distortions, open loop gain, operational amplifier, power supply rejection, system identification
摘要:
Using specially designed broadband periodic random excitation signals, the open loop, the common mode, and the power supply gains of operational amplifiers are measured and modeled. The proposed modeling technique 1) takes into account the mea- surement uncertainty and the nonlinear distortions, 2) gives infor- mation about possible unmodeled dynamics, 3) detects, quantifies, and classifies the nonlinear distortions, and 4) provides opamp pa- rameters (time constants, gain-bandwidth product, etc.) with confi- dence bounds. The approach is suitable for the experimental char- acterization of operational amplifiers (see [23]) as well as the fast evaluation of new operational amplifiers designs using network simulators (see Part I). Part I describes the modeling approach and illustrates the theory on simulations.