Analog Electronics - ECE Questions and Answers

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Which of the following number specification refers to FET with one gate?

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Which of the following plot can be directly used to determine β?

V_CE versus i_C for constant I_B

V_BE versus i_B for constant V_CE

V_CB versus i_C for constant I_B

All of the above

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Oscillation of frequency in Hartley oscillator is

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The emitter follower steps up the impedance by a factor of

a β

a/β

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In each of circuits below, indicate which diode is conducting?

Figure A

Figure B

Figure C

All the three

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A dc amplifier can operate

at zero frequency

only at low frequency

only at high frequencies

both at low and high frequencies

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Assertion (A): In a common source amplifier with source terminal at ac ground the voltage gain is about g_m r_d

Reason (R): A common source amplifier is a source follower circuit

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

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Thermal runaway will take place if the quiescent point is such that

V_CE >

V_CE < V_CC

V_CE < 2V_CC

V_CE <

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In applications where __________ input resistance is needed, the JFET is preferred to the bipolar transistor.

zero

very low

low

high