ECE 2100
Spring 2010
Homework assignment 5
Due April 23, 2010
Covered: Chapter 10:
Amplifiers and Opamps
1)
Prelab:
Consider the following differentiating Op Amp circuit.
a.
Derive a relationship between the input voltage and the output voltage.
Assume the Op Amp is ideal.
b.
Assume the input voltage is a triangular wave. What is the output
waveform? Explain!
c.
Find a relationship between the frequency and peaktopeak amplitude of
the triangular wave and the peaktopeak voltage of the output waveform.
d.
Predict the output voltage peaktopeak value if the input is driven by a 1
volt peaktopeak, 200 Hz sine wave.
2)
Consider the transformer plus fullwave rectifier shown, driven by a 120V (peak)
60Hz voltage (that is, V
1
=120V·cos(240
π
t)).
Assume that the diodes can be
modeled as ideal except with a turnon voltage of 0.7V.
Also assume that the
transformer is ideal.
a.
What will the peak voltage across the capacitor be?
b.
If the capacitor is loaded with a 100
Ω
resistor, sketch the waveform of
Vout.
What, approximately, will be the difference between the minimum
and maximum voltage across the capacitor (that is, what will the ripple
be?)
c.
Sketch the current waveform sourced by the voltage source V
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.
 Fall '05
 KELLEY/SEYLER
 Amplifier, Operational Amplifier, Volt, Operational amplifier applications, Vout, Book problem

Click to edit the document details