Mar 5, 2009 #1 P pbs681 Full Member level 3 Joined Aug 19, 2004 Messages 173 Helped 15 Reputation 30 Reaction score 3 Trophy points 1,298 Activity points 1,278 hi all, need help to answer below questions: 1) for stability analysis, which gain that we plot: open loop gain or loop gain? 2) Is phase margin and UGF will change after we close the loop? Thanks
hi all, need help to answer below questions: 1) for stability analysis, which gain that we plot: open loop gain or loop gain? 2) Is phase margin and UGF will change after we close the loop? Thanks
Mar 5, 2009 #2 S saro_k_82 Full Member level 6 Joined May 17, 2007 Messages 385 Helped 106 Reputation 212 Reaction score 45 Trophy points 1,308 Location India Activity points 3,835 1. Loop gain (A*beta)., Only this reveals the PM, GM, UGB in all cases 2. PM and UGF will be same., as you have accounted for the closed-loop gain in the beta term
1. Loop gain (A*beta)., Only this reveals the PM, GM, UGB in all cases 2. PM and UGF will be same., as you have accounted for the closed-loop gain in the beta term