I know the importance of phase margin to ensure stability in closed loop systems, but what about in open loop systems?
I am designing a regulated common based LNA IC that operates in open loop.
Can we just ignore the phase response and just focus on the gain and bandwidth?
I ensure all the poles are on the left half plane of the s-plane but two poles are located close to each other so I got the phase is -260deg when the gain is 1V/V.
The phase is that low because the DC gain is high, 9000 V/V.