Simulation and Measurement Techniques for CMRR of Operational Amplifiers

Various methods for simulation and measurement of common-mode rejection ratio(CMRR) of operational amplifiers were analyzed and compared.Effects of external elements,such as resistors and auxiliary amplifiers,on the device-under-test(DUT) were discussed in detail.Finally,methods suitable for simulation and measurement were summarized,respectively,which may provide a reference for simulation during design of operational amplifiers and measurement after packaging.