Analysis and design of operational amplifier stability based on Routh-Hurwitz method

This paper proposes to use Routh-Hurwitz stability criterion for analysis and design of the opamp stability, when its small equivalent circuit is derived; this can lead to explicit stability condition derivation for opamp circuit parameters, and this is very effective especially for multi-stage opamps. The proposed method has been verified by two two-pole amplifiers with theoretical analysis and SPICE simulations, as examples.