ECE :: Analog Electronics
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The voltage gains of an amplifier without feedback and with negative feedback respectively are 100 and 20. The percentage of negative feedback (β) would be
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Three cascaded stages have gains of 10, 20 and 25. The overall gain will be
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Find the odd one out
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In a one pole active low pass filter, the cut off frequency is fc. Then
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Turn off time of a transistor switch is equal to (where ts is storage time and tf is fall time.)
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In a CE amplifier circuit the emitter by pass capacitor is remove. The ac output voltage
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In a differential amplifier, CMRR can be improved by using an increased
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If ac resistance of diode is re, then In CE, BJT amplifier the input impedance is
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A.
gain decreases at the rate of 20 dB per decade increase in frequency above fc
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B.
gain decreases at the rate of 20 dB per decade decrease in frequency below fc
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C.
gain decreases at the rate of 40 dB per decade increase in frequency above fc
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D.
gain decreases at the rate 40 dB per decade decrease in frequency below fc
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