Q321
Open questionQuartz crystal is mostly used in crystal oscillator because
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Analog Electronics
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Q322
Open questionA microphone is connected between the base and the ground of a BJT. A 1 kΩ resistance is connected between the collector VCC. If Is = 6 × 10-16 A and the peak value of the microphone signal is 20 mV, what is the peak value of the output signal?
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Q323
Open questionConsider the oscillator circuit shown in the figure. The function of the network (shown in dotted lines) consisting of the 100 kΩ resistor in series with the two diodes connected back-to-back is to:
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Q324
Open questionReverse saturation current in the collector region of a transistor
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Q325
Open questionWhich of the following can be magnified by magnetic amplifiers
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Q326
Open questionAn ideal value of input resistance of trans resistance amplifier is.
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Q327
Open questionThe efficiency of a Class - B amplifier for a supply of VCC = 24 V and peak output voltages VL(P) = 22 V is
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Q328
Open questionA multistage amplifier employs five stages each of which has a power gain of 30? The total gain of the amplifier in dB is . . . . . . .
(log10 30 = 1.477)
(log10 30 = 1.477)
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Q329
Open questionWhich of the following indicates 2nd harmonic distortion in power amplifier?
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Q330
Open questionConsider the following statements:
Monolithic regulators can be used to
1. Realize a constant voltage regulator.
2. Realize a constant current regulator.
3. Introduce flexibility in setting output voltage level.
Of these statements
Monolithic regulators can be used to
1. Realize a constant voltage regulator.
2. Realize a constant current regulator.
3. Introduce flexibility in setting output voltage level.
Of these statements
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Q331
Open questionA monolithic metal oxide semiconductor (MOS) non-polarized capacitor which is a parallel plate capacitor with SiO2 as dielectric. A surface thin film of metal (aluminum) is the top plate. The bottom plate consists of the heavily doped n* region that is formed during emitter diffusion. What is the typical value of
capacitance for an oxide thickness of 500 Å of this MOS capacitor?
Take the permittivity of dielectric (εr) as 4.
Take the permittivity of dielectric (εr) as 4.
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Q332
Open questionWhich of the following holds FALSE for BJTs?
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Q333
Open questionIn order to ensure that the output voltage of an op-amp is zero, when both its inputs are grounded
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Q334
Open questionIf α = 0.98, ICO = 6 µA and IB = 100 µA for a transistor, then the value of IC will be
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Q335
Open questionThe circuit of figure uses an ideal Op-Amp for small positive values of Vin, the circuit works as
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Q336
Open questionFor a common emitter. BJT configuration with collector terminal resistance R, the slope of the D.C. load line can be given by:
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Q337
Open questionThe value of hFE (the hybrid parameters) of a Common-Emitter (CE) connection of a Bipolar Junction Transistor (BJT) is given as 250. What is the value of αdc (ratio of collector current to emitter current), for this BJT?
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Q338
Open questionConsider the following statements regarding an op-amp:
1. All types of negative feedback reduce nonlinear distortion.
2. All types of negative feedback reduce the output offset voltage.
3. Non-inverting (current and voltage) feedback increases the input impedance.
4. Inverting (current and voltage) feedback decreases input impedance.
Which of the above statements is/are correct?
1. All types of negative feedback reduce nonlinear distortion.
2. All types of negative feedback reduce the output offset voltage.
3. Non-inverting (current and voltage) feedback increases the input impedance.
4. Inverting (current and voltage) feedback decreases input impedance.
Which of the above statements is/are correct?
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Q339
Open questionFor the operational amplifier circuit shown, the output saturation voltages are ±15 V. The upper and lower threshold voltages for the circuit are, respectively,
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Q340
Open questionIn the given block diagram, which is the sampling element?
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