ECE :: Analog Electronics
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Which of the following power amplifiers has highest efficiency?
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A full wave rectifier using centre tapped transformer and a bridge rectifier use similar diodes and have equal no load output voltage. Under equal load conditions
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Assume that op-amp in figure is ideal. If input Vi is triangular, the output V0 will be
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In an amplifier with a gain of - 1000 and feedback factor β = - 0.1, the change in gain is 20% due to temperature. The change in gain for feedback amplifier will be
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In the diode circuit of figure the diodes are ideal. The average current through ammeter is
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A transistor has two p-n junctions. The batteries should be connected such that
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The value of parameter re used in re transistor model
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Assertion (A): In a full wave rectifier output the lowest ac component is at twice the input frequency
Reason (R): In a full wave rectifier, the output waveform consists of half sinusoids
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Assertion (A): Negative feedback reduces the bandwidth of an amplifier
Reason (R): Negative feedback stabilizes the gain of an amplifier
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