Analog Electronics - ECE Questions and Answers

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In a CE amplifier the dc load line is the same as ac load line when

ac collector resistance and dc collector resistance are equal

ac collector resistance and dc emitter resistance are equal

ac collector resistance is very high

ac collector resistance is one half of dc collector resistance

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If the output current wave shape of class C circuit has a period of 1 μs and a pulse width of 0.006 μs, the duty cycle is

0.6%

0.006%

0.06%

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Which configuration is suitable for impedance matching?

CB and CE

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A BJT is said to be operating in saturation region if

both junctions are reverse biased

both junctions are forward biased

base emitter junction is forward biased and base collector junction is reverse biased

base collector junction is forward biased and base emitter junction is reverse biased

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If an amplifier with gain of - 100 and feedback of β = - 0.1 has a gain change of 20% due to temperature the change in gain of the feedback amplifier will be

0.02%

0.1%

0.01%

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In figure the cut in voltage of diode is 0.7 V and its bulk resistance is 20 Ω. The peak value of circuit current of during positive and negative half cycles are

10 mA and zero

9.12 mA and zero

9.3 mA and zero

zero and 9.12 mA

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A voltage gain of a CE amplifier connected in collector to base configuration is 50. Collector to base resistor R_F = 1 kΩ, R_C = 4Ω, the O/P resistance R₀ =?

800 Ω

813 Ω

817 Ω

819 Ω