topquark wrote on Feb 13th, 2007, 4:24am:In principle, for a purely linear system the signal level shouldn't matter.
However, when it comes to different practical systems, we are constrained by limited-linear devices, bounded supply voltages.
So, for a power-electronic system a few volts and several amps maybe the order, for a microchip they maybe completely out-of-range.
You need to know something about the contents of your block apriori.
-Gau
hi Gau,
Thanks for the reply. It is helpfu to me.
Here, whatever the power-electronic system or the micrichip system, I can both inject the large step signal or the small step signal, the large one will make it enetr into the unliner region while the small one into kiner region. In thses cases, do you want me to use large signal or small signal in ivestigating its stability?
Thanks