January
2005, Issue 174
Test Your EQ
Each
month, Test Your EQ presents some basic engineering
problems for you to test your Engineering Quotient.
What's your EQ?
|
Problem
1—What
exactly does the following circuit do? Where might it
be used?
Answer
Problem
2—There is some jitter in the output signal of
the above circuit. How relevant is this in the context
of its intended application?
Answer
Problem 3—The raw data rates for telephone toll-quality
speech, stereo CD-quality music, and standard-definition
digital TV are 64 kbps, 1.4 Mbps, and 300 Mbps, respectively.
What are typical corresponding compressed data rates for
such signals?
Answer
Problem
4—What kind of playing time would you expect
to get out of a 20-GB hard drive for the various media
types?
Answer
Problem
5—Back
to basics: What are the necessary conditions to create
a stable oscillator?
Answer
Problem
6—When designing an amplifier circuit, how do
you keep it from oscillating?
Answer
Problem
7—What is “motorboating” in an amplifier?
Answer
