Environmental Engineering Reference
In-Depth Information
by is usually orders of magnitude smaller as compared
with or Due to the nonlinearities of the receiver, frequency com-
ponents other than those of the carriers are generated. The harmonic
components in the output of the receiver are not of concern because they
will be filtered out by a downstream low-pass filter. The third-order in-
termodulation at frequencies and however, are of a
critical concern because their spectra fall so close to those of the carriers
that the downstream filter can not eliminate them effectively. The anal-
ysis of the third-order intermodulation distortion is therefore of practical
importance. In this section, we compute the third-order intermodulation
of periodically switched nonlinear circuits.
4.1 The First-Order Volterra Circuit
Let the input of a periodically switched nonlinear circuit be
From the principle of superposition, the time-domain response of
of
the periodically switched nonlinear network, denoted by
contains
the frequency components
and
and can be represented by
Search WWH ::




Custom Search