Oct 29, 2014 #21 M metalgarri Junior Member level 3 Joined Jan 3, 2011 Messages 25 Helped 3 Reputation 6 Reaction score 3 Trophy points 1,283 Activity points 1,469 schmitt trigger said: I'm absolutely with FvM on this one. Adding gain to any feedback path, without proper loop analysis and stabilization, is a recipe for disaster. The circuit can break into oscillation at any time. Click to expand... As FvM suggested in a previeus post, a capacitor can be placed between the inverting in and the output of the opamp, in order to add a dominant pole to the loop and with some math the phase margin can be set at the wanted value.
schmitt trigger said: I'm absolutely with FvM on this one. Adding gain to any feedback path, without proper loop analysis and stabilization, is a recipe for disaster. The circuit can break into oscillation at any time. Click to expand... As FvM suggested in a previeus post, a capacitor can be placed between the inverting in and the output of the opamp, in order to add a dominant pole to the loop and with some math the phase margin can be set at the wanted value.