ECE :: Analog Electronics
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Class C amplifier is suitable for
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In a N-P-N transistor, when emitter junction is forward biased and collector junction is reverse biased the transistor will operate in
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A Wien bridge is suitable for
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The signal input to a given amplifier is made up of 100 mΩ signal power and 1 mΩ noise power. The amplifier contributes an additional 100 mΩ of noise and has a power gain of 20 dB. The noise factor is
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Assertion (A): The gain of an FET amplifier can be changed by changing gm
Reason (R): Most receivers use automatic gain control to counteract changes in volume caused by fading
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The element in the feedback circuit of a logarithmic amplifier using op-amp is
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Assertion (A): Class A and Class B amplifier predominate in audio applications.
Reason (R): Class C amplifier is used at radio frequencies.
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At midband frequencies the coupling capacitor in RC coupled CE amplifier may be considered as
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An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. What percentage of feedback will cause oscillations?
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