ECE65 (Winter 2007), Midterm
Name:
Notes:
1. Write your answers on these three sheets.
2. For each problem, 20% of points are alloacted for the correct
±nal answer.
3. Use the following information in solving or designing circuits: OpAmps are powered
by
±
15 V power supplies (power supplies not shown), have a unitygain bandwidth of
10
6
Hz, a shortcircuit current limit (maximum output current limit) of 250 mA, and a
slew rate of 1 V/
μ
s. In circuit design, use commercial resistor and capacitor values of 1,
1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2, 2.2, 2.4, 2.7, 3., 3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5,
8.2, 9.1 (
×
10
n
where
n
is an integer). You can also use 5 mH inductors.
Problem 1.
Design a circuit with a transfer function of
H
(
jω
) =
1
1

j
10
5
/ω
and a
minimum input impedance of 10 kΩ. (10pts)
The transfer function is for a ±rstorder highpass ±lter with
ω
c
= 10
5
rad/s.
Since
K
= 1, we can (and should) use a passive ±lter. Prototype of the circuit is shown below
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 Winter '08
 najamanverde
 Operational Amplifier, Ohms law, The Circuit, Electrical impedance

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