ECE 3042
Homework Assignment No. 4
Spring 2010 Homework for Experiment No. 4
Due Week of February 15
1. Shown above is an op amp differential amplifier with a floating source input. Design this op amp
differential amplifier to have a differential gain of
7
.
3
and a differential input impedance of
2k
Ω
. Assume that
R
o
is
zero for the design calculations.
Use either Cadence or National Instruments SPICE (Multisim) to perform a transient analysis of this
amplifier if the inputs are two single ended sources instead of the floating source. For the two inputs to the amplifier
use
v
1
(
t
)=
A
1
sin(
ω
1
t
+
φ
1
)+
v
sq
(
t
)
and
v
2
(
t
)=
v
sq
(
t
)
where
A
1
= 322 mV
,
f
1
=1kHz
,
φ
1
=45
◦
,and
v
sq
(
t
)
is a symmetric square wave with a peak to peak value of
8V
, a frequency of 4
kHz
, and makes the transition from the lower level to the upper level at
t
=0s
. Plot the output
voltage as a function of time for
0
<t<
3ms
. Use SPICE to perform a harmonic analysis (the frequency spectra) of
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 Brewer
 Commonmode rejection ratio, multisim, 30%, National Instruments

Click to edit the document details