Analog Electronics - ECE Questions and Answers

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By connecting external resistances to a differential amplifier we can adjust

voltage gain

bandwidth

both voltage gain and bandwidth

none of the above

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In a CC circuit the current gain is

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A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What must be the minimum gain of the oscillator to provide oscillations?

100

130

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For the circuit shown in figure low cut-off frequency is

1.59 Hz

159 Hz

1.59 kHz

1.59 MHz

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In a CE amplifier the Q point is very close to saturation point on the dc load line. This results in

positive clipping of collector current

negative clipping of collector current

both positive and negative clipping of collector current

either positive or negative clipping of collector current

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Class-B amplifier has less efficiency compared to

class A

class B

class C

class A, AB and C

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In the amplifier circuit figure the quiescent point voltage and current are

12 V, 5 mA

12 V, 2 mA

10 V, 2 mA

10 V, 5 mA

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Calculate the O/P voltage of a non-inverting constant gain multiplier with R₁ = 100 kΩ, R_f= 600 kΩ, V₁ = 2 volt, then O/P voltage V_o of non inverting op-amp is given by

16 V

14 V

20 V

15 V