I have general question about analyzing stability with op amp:
There is some bode plot of A (op amp) and feedback factor (1/Beta) of some circuit that I am trying to analyze. Below the critical frequency (fc, where A*Beta = 1), there is no stability problem, but what is happening if my input signal is at frequency that is higher then critical? Do we analyze stability always with step impulse at input or we can put some sin or cos signal and see what is happening at output?
The circuit is simple buffer with capacitive load, but as I sad at the beggining, my question relates on general situation.
There is some bode plot of A (op amp) and feedback factor (1/Beta) of some circuit that I am trying to analyze. Below the critical frequency (fc, where A*Beta = 1), there is no stability problem, but what is happening if my input signal is at frequency that is higher then critical? Do we analyze stability always with step impulse at input or we can put some sin or cos signal and see what is happening at output?
The circuit is simple buffer with capacitive load, but as I sad at the beggining, my question relates on general situation.