chang830
Full Member level 5
Hi
I have a question on the phase margin and gain margin.
We know both the phase matgin and gain margin are needed to describe the stability.
In design the OSC, we always give the phase margin and gain margin to evaluate its capabilty to buildup the oscillation.
But in the stabilty analysis of the amplifier, we always only gives its phase margin and seldom concern the gain margin.
Anyone tell me why?
I think if the gain is always too small when phase chage is 0, so we ingore it.
Pls. comments.
Thanks
I have a question on the phase margin and gain margin.
We know both the phase matgin and gain margin are needed to describe the stability.
In design the OSC, we always give the phase margin and gain margin to evaluate its capabilty to buildup the oscillation.
But in the stabilty analysis of the amplifier, we always only gives its phase margin and seldom concern the gain margin.
Anyone tell me why?
I think if the gain is always too small when phase chage is 0, so we ingore it.
Pls. comments.
Thanks