samiran_dam
Full Member level 2
Dear all,
In opamp design, if there is a complex-conjugate pair as 1st non-dominant pole in the frequency response plot, is the design considered to be reasonable? Because of the complex-pair, phase margin is good ( > 60 deg.). But in closed loop gain-frequency response plot, I am observing a little inductive peaking around the unity-gain-bandwidth frequency. So I am having a doubt whether the design can be considered good or not?
Can somebody guide me understanding the pros and cons of the complex-conjugate pair as 1st non-dominant pole?
regards
Sam
In opamp design, if there is a complex-conjugate pair as 1st non-dominant pole in the frequency response plot, is the design considered to be reasonable? Because of the complex-pair, phase margin is good ( > 60 deg.). But in closed loop gain-frequency response plot, I am observing a little inductive peaking around the unity-gain-bandwidth frequency. So I am having a doubt whether the design can be considered good or not?
Can somebody guide me understanding the pros and cons of the complex-conjugate pair as 1st non-dominant pole?
regards
Sam