The encapsulation of transistor is necessary for
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ECE · all questionsAnalog Electronics
Analog Electronics
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In deriving ac equivalent circuit for an amplifier circuit we short circuit
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Thermal runaway is not possible in FET because as the temperature of FET increases
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The direction of induced e.m.f. can be found by
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In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
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A crack in the magnetic path of an inductor will result in
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Consider the following statements:
A clamper circuit
1. adds or subtracts a dc voltage to or from a waveform.
2. does not change the shape of the waveform.
3. amplifies the waveform.
Which of the statements give above are correct?
Of these statements
A clamper circuit
1. adds or subtracts a dc voltage to or from a waveform.
2. does not change the shape of the waveform.
3. amplifies the waveform.
Which of the statements give above are correct?
Of these statements
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Class-B amplifier has less efficiency compared to
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In a MOSFET operating in the saturation region, the channel length modulation effect causes
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A two stage capacitor coupled CE amplifier has stages having a voltage gain of 100 each. It is known that the gain of each stage drops by 3 dB at lower cutoff frequency. What is the overall gain of the multistage amplifier at lower cutoff frequency?
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A Darlington stage is shown in the figure is, if the trans-conductance Q1 is gm1 and Q2 is gm2, then the overall trans-conductance gm is given by
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The input Vi to the circuit shown in figure below is a square wave of amplitude ±1 V and frequency 100 Hz.
Assuming ideal components, the peak-to-peak amplitude of the output V0 is:
Assuming ideal components, the peak-to-peak amplitude of the output V0 is:
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Which type of negative feedback is used to improve performance of current amplifier?
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For 555 astable multivibrator, if C = 0.01 µF, RA = 10 kΩ, RB = 50 kΩ, the frequency and the duty cycle will be nearly.
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The hybrid-pi model is used for:
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Consider an inverting amplifier with a feedback resistor R2 = 10 kΩ and an op-amp with parameters; AoL = 105 and Ri = 10 kΩ. Assuming the output resistance R0 of the op-amp is negligible, the closed-loop input resistance at the inverting terminal of an inverting amplifier will be nearly:
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A source follower (using a FET) usually has a voltage gain which is
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In the Hybrid-pi model for the BJT small signal analysis, rπ denotes
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For the circuit shown in figure, the transistor parameters are VBE = 0.7 V , β = 99. If VC is to be set at 7.5 V, the required value (in kΩ) of RB is
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Which one of the following is a wide band amplifier?
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