Environmental Engineering Reference
In-Depth Information
Now the right-half plane zero, is placed at a very high frequency and can
be neglected. Moreover, as proposed in [AH87] and developed in [PP95], a
pole-zero compensation can be performed to increase the gain bandwidth
product. In particular, we can properly design the voltage buffer to ensure
the output resistance is equal to
which sets The new second pole is now the old third pole in (5.28)
which by using (5.31) becomes
The phase margin is given by
which yields the required compensation capacitance
After substituting the value found in the gain bandwidth product we get
