March
2005, Issue 176
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—What
was the capacity of the first generation of 8² floppy disk drives?
Answer
Problem
2—What is the structural difference between NAND
flash memory EEPROM and NOR flash EEPROM?
Answer
Problem 3—What is the difference in application
between NAND flash memory EEPROM and NOR flash EEPROM?
Answer
Problem
4—What is the function of the circuit below?
Answer
Problem
5—Watermarking is the process of adding a digital
signal to an audio recording, still picture, or video in
such a way that the digital content can be recovered at
a later time. What are some of the important attributes
of watermarking technologies in general?
Answer
Problem
6—One application for watermarks is for identifying
evidence to be used in court cases. Which attributes are
most important for this type of watermark?
Answer
Problem
7—Another application for watermarks is to encode
an identifier so that automatic scanners can readily recognize
the marked item. This allows commercial music to be monitored
for performance royalties and verification of advertising
plays. Which attributes are more important in this application?
Answer
Problem
8—When recording LPs, it was found that boosting
the higher frequencies during the recording process and
then reducing them a corresponding amount on playback
corrected several deficiencies in the recording process,
including excessive high-frequency noise and poor dynamic
range at lower frequencies. A standard preemphasis curve
was eventually defined by the RIAA (Recording Industry
Association of America (RIAA). What is the definition
of their curve?
Answer
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