June
2005, Issue 179
Test Your EQ
Each
month, Test Your EQ presents some basic engineering
problems for you to test your Engineering Quotient.
What's your EQ?
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Problem
1—How
much error in clock frequency between transmitter and
receiver can be tolerated in a standard 8N1 asynchronous
(i.e., UART-based) communications link?
Answer
Problem
2—What is the key difference between the
following two switch-mode regulator topologies?
Answer
Problem 3—How can you build a difference
amplifier that uses a single positive power supply but still
allows at least one of the inputs to swing below ground?
Answer
Problem
4—What is a Hamming code?
Answer
Problem
5—How can you construct a Hamming code to protect,
say, a 4-bit data word?
Answer
Problem
6—How many different (but equivalent)
Hamming codes can be constructed this way?
Answer
Problem
7—What happens when multiple bits get flipped
in a Hamming codeword?
Answer
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