Environmental Engineering Reference
In-Depth Information
which the nonlinear amplifier
is characterised by the same nonlinear
coefficients in (7.60).
By comparing the general model in Fig. 7,8 with that in Fig. 7.11 we can
utilise (7.52)-(7.54) to obtain the expression of the nonlinear closed-loop
coefficients, where
and
In addition, the closed-loop gain results
which, despite the different sign (inessential in evaluating distortion), equals
the transfer function obtained by a direct inspection of the circuit in Fig.
7.10. Then, from relationship (7.52)-(7.54) we get the equivalent nonlinear
coefficients
and
which relate
to
in Fig. 7.11
