Environmental Engineering Reference
In-Depth Information
The equivalent noise representation of the closed-loop amplifier using the
input-referred noise generators,
and
is illustrated in Fig. 8.11.
Again, to calculate we equate the output noise of the two circuits with
the input shorted to ground. Assuming the amplifier open-loop gain to be
infinitely large, the input-output closed-loop gain will be and the
PSD of the output noise voltage for the two circuits will be respectively
from which we get
