Environmental Engineering Reference
In-Depth Information
Thus, assuming the poles are widely separated their approximate expressions
become:
Capacitor provides a path for feedback and for feedforward. The
feedforward leakage produces a real zero in the right-half plane (RHP) given
by
The effect of this zero is neglected here for simplicity (the zero may be
either at a very-high frequency or be compensated with one of the methods
described in the next paragraph).
In (5.13) and (5.14), term accounts for the Miller effect
[MG87]. In practical cases it is the dominant term because capacitance
is
multiplied by a factor as high as a stage gain,
In such cases the
expressions of the two poles (5.13) and (5.14) simplify to
