EEL6935: Analog Signal Processing HW#2
EEL 6935: HW#2
Due Friday, September 27, 2002 in class. Late homework loses
e#of days late −1percentage points. See the current late penalty at
http://www.cnel.ufl.edu/hybrid/harris/latepoints.html
1. Solve for Iout as a function of I1and I2. As usual, first, assume κ= 1
and derive your answer. Then assume κis the same for all transistors
but not equal to one and derive your answer. Show all of your work and
explicitly state all assumptions, e.g. which transistors are in saturation,
subthreshold operation, matching of devices, etc. You will have to think
a little bit more about this circuit than those in HW#1.
I1 I2
Iout
2. Derive another expression for the output voltage limitation of the five-
transistor transconductance amplifier using the following constraint.
Assume that the value of Vout is valid until it changes the output current
by IBfrom its nominal value. Give a simplified rule of thumb for the
limits of Vout and, as usual, state all of your assumptions.
J.G. Harris September 16, 2002 1
