ECEN 2250
Introduction to Circuits & Electronics
Fall 2011
11-27-11
P. Mathys
Problem Set 11
(Solutions are due Fri. 12-02-11)
Note: For all problems you have to explain how you arrived at the solution legibly and in
a logical order. This includes (i) Statement of problem, (ii) strategie(s) for solution, (iii)
execution of the strategy, identifying each step and including a check of the solution(s), and
(iv) logical and legible presentation and clear identification of the solution.
1) Design an (ideal) OpAmp circuit that computes
vO = 36 v1 − 0.5 v2 + 10 v3 − 2 v4 .
You can use one or two ideal OpAmps. The smallest resistance value that you can use is
10kΩ. Design your circuit such that the largest (total) resistance value is as small as possible.
Explain your design process.
2) Problem 7-8 in the book.
3) Problem 7-12 in the book.
4) Problem 7-32 in the book. Use LTspice instead of OrCAD.
5) Problem 15-2 in the book.
6) Determine the inductance between terminals a and b for the three coupled inductors
shown below.
MA
a ◦
MC
•
•
L1
L2
•
L3
◦ b
MB
c
2001–2011,
P. Mathys.
Last revised: 11-27-11, PM.
1