New Measurement Methods of Dominant-Pole-Type Operational Amplifier Parameters

New simple and easy methods measuring the parameters of operational amplifiers (OA´s) are presented with newly constructed testing circuits and setups. Firstly, it is shown that the transition frequency and dominant-pole frequency are derived from a relaxation or harmonic oscillator in which the OA under test is used as an element of the circuit. Secondly, it is shown that other parameters such as the open-loop gain, the input and output resistance, the input offset voltage, the input bias current, and the input offset current are obtained easily from the new circuits.