From Eqs. (10.116) and (10.117), we see that as Cf is increased, is reduced and is
increased. This action is referred to as pole splitting. Note that the increase in is highly
beneficial; it allows us to move point Z (see Fig. 10.44) further to the right, thus resulting in
higher compensated open-loop gain. Finally, note from Eq. (10.116) that Cf is multiplied by
the Miller-effect factor gmR2, thus resulting in a much larger effective capacitance, gmR2Cf .
In other words, the required value of Cf will be much smaller than that of CC in Fig. 10.45.