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Average Round

(Electronics)

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( )

Type of diode that operatesonly with majority carriers.

It is used in fast-switchingcircuits. (Also known as hot-

carrier diodes)

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Schottky diodes

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It is the most common biasingcircuit that provides good Q-point stability with a single-

polarity supply voltage.

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Voltage Divider Bias Circuit

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Difficult Round

(Electronics)

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It states that an electromotiveforce is induced in a

conductor when themagnetic field surrounding

it changes.

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Faradays first Law ofElectromagnetic Induction

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When charged particles flowthrough a tube w/c has both an

electric field and a magnetic fieldpresent on it, only certain

velocities of the charged particlesare preferred, and will make it

undeviated through the tube; the

rest will be deviated into thesides. What do you call this

effect?

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Hall Effect

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In a two-input OR gate, 3 of its 4combinations produces an

output of logic 1. If 7 inputs areimpressed to an OR gate, whatis the probability of having a

high output?Note: Answers must be exact.

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127/128

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It is a low resistance pathwhich is connected in

parallel with the series fieldcoil to vary the

compounding of thegenerator.

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Diverter

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Easy Round

(Communications)

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A type of noise that ischaracterized by high-

amplitude peaks of shortduration in the total noise

spectrum.

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Impulse noise

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What will normal AmplitudeModulation receiver detect

from an unmodulated RadioFrequency AC wave?

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Nothing

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It is the mixing of two

frequencies across a non-linear impedance.

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Heterodyning

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It is used to generate manyoutput frequencies through

the addition, subtraction,multiplication, and divisionof a smaller number of fixed

frequency sources.

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Frequency synthesizer

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Average Round(Communications)

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A three stage amplifier has an

input stage with noise ratioof 5 and a power gain of 50.Stages 2 and 3 have a noise

ratio of 10 and power gain of1000. Calculate the noise

figure for the overall system.Round off answers into two

decimal places.

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7.14 dB

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An amplifier has noise figureof 2 dB. What is the

equivalent noisetemperature? Round off

answers to the nearest wholenumber.

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170 Kelvin

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According to the ITUdesignations, what type of

modulation of the main carrieris being used for B8E?

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Independent Sideband

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A few centimeters long solid

insulated hook up wire thatprovides small capacitance

to the ground that isadjusted during circuitalignment by bending

slightly in one direction oranother.

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Gimmick

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Difficult Round(Communications)

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A single-digit seven segmentLCD emits 0 with probability

of 0.25, a 1 and a 2 withprobability of o.15 each, 3, 4,

5, 6, 7, and 8 with probabilityof 0.07, and 9 with a

probability of 0.03. Find itsentropy. Express your answerin 5 significant figures.

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3.0842 bits per symbol

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Type of resistor that

generates the lowestthermal noise.

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Wire - wound

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Find the modulation index if a

100 V carrier is amplitudemodulated by three different

frequencies with amplitudesof 1 V, 2 V, and 3 V,

respectively. Round ofanswers to the nearest

thousandths.

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0.374

A single stage amplifier has a 400 kHz

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A single stage amplifier has a 400 kHzbandwidth and a voltage gain of 100

at room temperature (250

C).Assumethat the external noise is negligibleand that a 1 mV signal is applied to

the amplifiers input. Calculate theoutput noise voltage if the amplifierhas a 6 dB NF and the input noise isgenerated by a 2 kilo ohm resistor.

Express your answers in micro volts

w/ 3 significant digits.

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724 microvolts