Nov 13, 2007 #1 S stevenlee Member level 2 Joined Sep 28, 2006 Messages 51 Helped 3 Reputation 6 Reaction score 1 Trophy points 1,288 Activity points 1,532 the open loop ac response of an fully differential opamp is shown in the picture, the phase margin is 127deg as shown, please give some comment and is there any potentional problem based on the ac response you observe?
the open loop ac response of an fully differential opamp is shown in the picture, the phase margin is 127deg as shown, please give some comment and is there any potentional problem based on the ac response you observe?
Nov 13, 2007 #2 Y yxo Full Member level 4 Joined Jul 13, 2007 Messages 196 Helped 26 Reputation 52 Reaction score 8 Trophy points 1,298 Location The Netherlands, Delft Activity points 2,303 Phase margin is 180-127 = 53 deg. Confuse nonlineriaty of ac on 100-120 Meg. It may reduce to poor slew rate and large harmonic distortions
Phase margin is 180-127 = 53 deg. Confuse nonlineriaty of ac on 100-120 Meg. It may reduce to poor slew rate and large harmonic distortions
Nov 13, 2007 #3 S stevenlee Member level 2 Joined Sep 28, 2006 Messages 51 Helped 3 Reputation 6 Reaction score 1 Trophy points 1,288 Activity points 1,532 you are right, pm is 53, not 127., thanks for correct me this