Environmental Engineering Reference
In-Depth Information
equivalent to the parallel of resistance
and
Since resistance
is
always much lower than both resistances
and
the mixed model can be
further simplified as shown in Fig. 9.5.
Now we use the Rosenstark/Blackman equations to find the asymptotic
gain and the input and output resistances, assuming that the controlled
generator characterised by transconductance is the critical parameter. Of
course, setting this parameter to zero means switching off transistor T1
allowing the direct transmission term to be evaluated from Fig. 9.6. The
output current can be simply calculated by considering the equivalent
transconductance,
of transistor T3 in a common X configuration with a
degenerative
resistance
equal to
Assuming all the transistors with
