Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while typing up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
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My Hobby Website:
Ultra Low Power Bioelectronics
RF Cafe Quiz #24
All RF Cafe Quizzes make great fodder for
employment interviews for technicians or engineers - particularly those who are
fresh out of school or are relatively new to the work world. Come to think of it,
they would make equally excellent study material for the same persons who are going
to be interviewed for a job. Bonne chance, Viel Glück, がんばろう,
buena suerte, удачи, in bocca al lupo, 행운을 빕니다,
ádh mór, בהצלחה, lykke til, 祝你好運.
Well, you know what I mean: Good luck!
Click here for the complete list of
RF Cafe Quizzes.
Note: Some material based on books have
quiz is based on the information presented in Ultra Low Power Bioelectronics: Fundamentals, Biomedical
Applications, and Bio-Inspired Systems, by Rahul Sarpeshkar, published by Cambridge University Press.
Some of these books are available as prizes in the monthly
RF Cafe Giveaway.
1. Which formula represents what is known as "1/f" noise?
2. What is Return Ratio Analysis?
a) An investment strategy for tech companies
b) A method
for analyzing circuit robustness in response to changes in gain or impedance
c) The electrical equivalent of a
mass/damper mechanical system
d) A measure of current reflection
3. What is
the name of the process used to simplify analysis of a complex system when
an additional passive element
is added in parallel?
a) A Norton equivalent system theorem
b) Kirchhoff's law for parallel elements
c) Middlebrook's extra-element theorem
d) Cascoded elements theory
4. What function does a gyrator circuit perform?
a) Inverts impedance
(changes L to C, or C to L)
b) Creates a circulating current in a tank circuit
c) Drives a gyroscope at a
d) Converts DC to AC
5. What is a key feature of a
neuron-inspired analog-to-digital converter?
a) Brain-like logic
b) Small size comparable to neurons
c) A concept though of while using the inventor's brain's neurons
d) Energy efficiency
6. What does the Bode-Fano criterion state?
a) All circuit responses can be
represented on a Bode plot
b) All circuit responses can be represented on a Bode-Fano plot
c) All response
can be reduced to a single passive and single active element
d) For passive loads (series or parallel RC or
RL), there is an inverse relationship between good
impedance matching at a single frequency and good
matching across the entire band
7. Which type of biomedical implant is not likely
to employ a wireless link to an external transceiver?
a) Cardiac pacemaker
b) Cochlear implant
c) Hair plug
d) Retinal implant
Which curve in the graph to the right represents
skin depth in biological tissue?
9. What is the
approximate power consumed by the average
human male brain, consisting of 22 billion neuronal cells?
a) 1.5 kW
b) 15 W
c) 1 W
d) 15 mW
10. Name the three regions of current-dependent battery polarization as a function of
a) Active, ohmic, concentration
b) Active, ohmic, jeopardy
c) Passive, active, inverse
d) Inverse, proverse, null
Need some help? Click here for the
answers and explanations.