Cascade and Darlington Amplifier Online Exam Quiz

Cascade and Darlington Amplifier GK Quiz. Question and Answers related to Cascade and Darlington Amplifier. MCQ (Multiple Choice Questions with answers about Cascade and Darlington Amplifier

Calculate the forward bias current of a Si diode when forward bias voltage of 0.4V is applied, the reverse saturation current is 1.17?10-9A and the thermal voltage is 25.2mV.


A : 9.156mA

B : 8.23mA

C : 1.256mA

D : 5.689mA

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Calculate the reverse saturation current of a diode if the current at 0.2V forward bias is 0.1mA at a temperature of 25?C and the ideality factor is 1.5.


A : 5.5x 10-9 A

B : 5.5x 10-8 A

C : 5.5x 10-7 A

D : 5.6x 10-10 A

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Calculate the thermal voltage when the temperature is 25?C.


A : 0V

B : 0V

C : 0.026V

D : 0.25V

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Consider a Darlington amplifier. In the self bias network, the biasing resistances are 220k? and 400 k?. What can be the correct value of input resistance if hfe = 50 and emitter resistance = 10k?.


A : 141 k?

B : 15 M?

C : 20 M?

D : 200 k?

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Consider the figure shown.^^ Given that gm1 = 30m?-1 and gm2 = 50m?-1, ?1 = 1.1, ?2 = 1.5 what is the transconductance of the entire network?


A : 80 m?-1

B : 75 m?-1

C : 33 m?-1

D : 55 m?-1

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Darlington amplifier is an emitter follower.




C : -

D : -

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Find the applied voltage on a forward biased diode if the current is 1mA and reverse saturation current is 10-10. Temperature is 25?C and takes ideality factor as 1.5.


A : 0.658V

B : 0.726V

C : 0.526V

D : 0.618V

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Find the temperature at which a diode current is 2mA for a diode which has reverse saturation current of 10-9 A. The ideality factor is 1.4 and the applied voltage is 0.6V forward bias.


A : 69.65?C

B : 52.26?C

C : 25.23?C

D : 70.23?C

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Find the transconductance of the network given below, provided that gm1 = 30m?-1. VT = 25mV, VBias > 4V.^


A : 30m?-1

B : 10m?-1

C : 1m?-1

D : 20m?-1

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In the given circuit, hfe = 50 and hie = 1000?, find overall input and output resistance.^


A : RI=956?, RO=1.6 k?

B : RI=956 k?, RO=2 k?

C : RI=956 ?, RO=2 k?

D : RI=900?, RO=10 k?

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