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About RF Cafe
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... All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowl My Hobby Website: |
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Ultra Low Power Bioelectronics |
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Click here for the complete list of RF Cafe Quizzes. Note: Some material based on books have quoted passages.  This
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.Note: 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? a) 1/f b) 1/fn c) f∞ d) 1/f∞ 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 predetermined speed 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  8.
Which curve in the graph to the right representsskin depth in biological tissue? a) A b) B c) C d) D 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 voltage 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. |
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