stenzer
Advanced Member level 3
Hi,
I'm analyzing a circuitry including an opamp. I'm interested in the stability of the system. By analyzing the loop gain of the opamp by the nyquist criterion (bode plot), I'm able to determine the phase margin and gain margin, and thus if the system is stable or not. But I have two questions concerning the stability by means of its desired operation frequency f_x (e.g. at a single sine wave).
Is it possible to make any stability statement by having a look, at the desired frequency f_x, in the bode plot (phase & gain) of the
(i) loop gain, or
(ii) closed loop (transfer function of the complete system)
BR
I'm analyzing a circuitry including an opamp. I'm interested in the stability of the system. By analyzing the loop gain of the opamp by the nyquist criterion (bode plot), I'm able to determine the phase margin and gain margin, and thus if the system is stable or not. But I have two questions concerning the stability by means of its desired operation frequency f_x (e.g. at a single sine wave).
Is it possible to make any stability statement by having a look, at the desired frequency f_x, in the bode plot (phase & gain) of the
(i) loop gain, or
(ii) closed loop (transfer function of the complete system)
BR