In the above figure the op amp is ideal except for the fact that it has a
nonzero output impedance of value 
This means that we can replace
the opamp in the above
figure with an equivalent circuit
of an ideal op amp and an explicit
resistor. This change is shown below:
Answer all of the following questions expressing your answers in terms of
, 
, and 
.
Compute the gain ( 
) of two cascaded stages
of identical copies of this circuit as shown in the above figure. As
before, each op amp has an output impedance of .
(the saturation current) for this diode?
(the small-signal resistance)
for this diode when the forward-bias voltage is 0.725V?
In the following circuit the op amp is ideal in all aspects but
the diode will be modelled
using the ideal diode and battery model in all
parts of this question
( 
).
).
as a function
of 
? (Don't forget to include the 0.7V battery)
as a function
of ?
(Don't forget to include the 0.7V battery)
for all possible values of (still assuming
the ideal diode and battery model for the diode).
What is the approximate unity gain frequency 
of this op amp?
(Make sure the units of are correct!)
