When i design the limiting amplifier that consists of 4 stages, i found out that if the first 2 stage more lower bandwidth (12G) and cascase with 2 last stage more higher bandwidth (16G), overall you can get more bandwidth (5G) compare to high bandwidth to lower bandwidth cascading only get 4G, any reason for that?
Here you should appreciate the Bode plot in obtaining the frequency ac response of the cascaded stage, lower bandwidth corresponds to lower db/decade slope compared to higher bandwidth. Hope this helps