Environmental Engineering Reference
In-Depth Information
signal model in Fig. 6.23. The return can be immediately evaluated from Fig.
6.23, or even directly from Fig. 6.22, and is given by
where
and
was assumed for simplicity
3)
Set the parameter the parameter infinitely large. By inspection of
Fig. 6.20, since the voltage is still finite, the voltage must be zero.
This means that all the input current flows through feedback resistance
thus setting the output voltage
to
The asymptotic transresistance
results to be
Hence, substituting
T
and into the Rosenstark relationship (3.7), we
get the closed loop transresistance that, in general, due to the very high
loop gain is almost coincident with the asymptotic gain
