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About the Extra Questions category
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0
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21
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December 15, 2025
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E7B08 - Why are switching amplifiers more efficient than linear amplifiers?
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1
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21
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January 24, 2026
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E8A01 - What technique shows that a square wave is made up of a sine wave and its odd harmonics?
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1
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25
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January 24, 2026
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E2A13 - Which of the following techniques is used by digital satellites to relay messages?
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1
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29
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January 2, 2026
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E6D07 - What is the current that flows in the primary winding of a transformer when there is no load on the secondary winding?
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1
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27
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January 2, 2026
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E7H13 - Which of the following is a technique for providing highly accurate and stable oscillators needed for microwave transmission and reception?
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0
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9
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January 2, 2026
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E7H12 - Which of the following ensures that a crystal oscillator operates on the frequency specified by the crystal manufacturer?
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0
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10
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January 2, 2026
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E7H11 - What are the major spectral impurity components of direct digital synthesizers?
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0
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16
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January 2, 2026
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E7H10 - What information is contained in the lookup table of a direct digital synthesizer (DDS)?
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0
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8
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January 2, 2026
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E7H09 - What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital-to-analog converter, and a low-pass anti-alias filter?
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0
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7
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January 2, 2026
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E7H08 - Which of the following components can be used to reduce thermal drift in crystal oscillators?
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0
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10
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January 2, 2026
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E7H07 - How can an oscillator's microphonic responses be reduced?
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0
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16
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January 2, 2026
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E7H06 - Which of these functions can be performed by a phase-locked loop?
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0
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10
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January 2, 2026
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E7H05 - How is positive feedback supplied in a Pierce oscillator?
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0
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9
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January 2, 2026
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E7H04 - How is positive feedback supplied in a Colpitts oscillator?
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0
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8
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January 2, 2026
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E7H03 - What is a phase-locked loop?
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0
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13
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January 2, 2026
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E7H02 - What is a microphonic?
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0
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7
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January 2, 2026
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E7H01 - What are three common oscillator circuits?
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0
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7
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January 2, 2026
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E7G12 - What is an operational amplifier?
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0
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6
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January 2, 2026
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E7G11 - What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 3,300 ohms and RF is 47 kilohms?
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0
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9
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January 2, 2026
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E7G09 - What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1,000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?
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0
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24
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January 2, 2026
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E7G08 - How does the gain of an ideal operational amplifier vary with frequency?
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0
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8
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January 2, 2026
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E7G07 - What voltage gain can be expected from the circuit in Figure E7-3 when R1 is 10 ohms and RF is 470 ohms?
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0
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24
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January 2, 2026
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E7G06 - What is the gain-bandwidth of an operational amplifier?
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0
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5
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January 2, 2026
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E7G05 - How can unwanted ringing and audio instability be prevented in an op-amp audio filter?
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0
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15
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January 2, 2026
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E7G04 - What is meant by the term "op-amp input offset voltage"?
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0
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12
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January 2, 2026
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E7G03 - What is the typical input impedance of an op-amp?
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0
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6
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January 2, 2026
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E7G02 - What is the frequency response of the circuit in E7-3 if a capacitor is added across the feedback resistor?
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0
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10
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January 2, 2026
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E7G01 - What is the typical output impedance of an op-amp?
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0
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12
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January 2, 2026
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E7F14 - Which of the following would allow a digital signal processing filter to create a sharper filter response?
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0
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16
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January 2, 2026
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