ECE :: Analog Electronics
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To prevent a DC return between source and load, it is necessary to use
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For a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100
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Which of the following oscillators is suitable for frequencies in the range of mega hertz?
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If the input to the ideal comparator shown in the figure is a sinusoidal signal of 8 V (peak to peak) without any DC component, then the output of the comparator has a duty cycle of
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A half wave diode circuit using ideal diode has an input voltage 20 sin ωt volts. Then average and rms values of output voltage are
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An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with β = 0.1 is used, the lower cut off frequency will be
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In figure v1 = 8 V and v2 = 4 V. Which diode will conduct?
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Gain of the amplifier is 'A'. Then the I/P impedance and O/P impedance of the closed loop amplifier shown below would be
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If an amplifier with gain of - 1000 and feedback factor β = - 0.1 had a gain change of 20% due to temperature, the change in gain of the feedback amplifier would be
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In figure The minimum and maximum load currents are
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and 10 V 
and 10 V 
and VC = 0.5 x 20 = 10 V.
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or 120 mA.