Environmental Engineering Reference
In-Depth Information
From the considerations regarding the location of and made above,
the transition frequency, can be assumed to be equal to the gain-
bandwidth product, (which formally represents the unity-gain
frequency of a one-pole amplifier) so that (4.26) can be rewritten as
Nevertheless, if we want to accurately evaluate the deviation of
from
we can use the following results.
By using parameter
K
defined in (4.14), and the trigonometric identity
from relationship (4.27) we get
where parameter is the spacing of the doublet normalised to its pole and
is the doublet average frequency (evaluated as the geometric mean
between
and
respectively, defined by
Normalising the doublet frequency,
to
