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ECE :: Analog Electronics

  1. CC circuit is suitable for impedance matching.

  2. A.
    True
    B.
    False

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

  4. A.
    2N
    B.
    3N
    C.
    3Y
    D.
    3X

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

  6. A.
    VCE versus iC for constant IB
    B.
    VBE versus iB for constant VCE
    C.
    VCB versus iC for constant IB
    D.
    All of the above

  7. Oscillation of frequency in Hartley oscillator is


  8. The emitter follower steps up the impedance by a factor of

  9. A.
    a
    B.
    β
    C.
    a β
    D.
    a

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

  11. A.
    Figure A
    B.
    Figure B
    C.
    Figure C
    D.
    All the three

  12. A dc amplifier can operate

  13. A.
    at zero frequency
    B.
    only at low frequency
    C.
    only at high frequencies
    D.
    both at low and high frequencies

  14. Assertion (A): In a common source amplifier with source terminal at ac ground the voltage gain is about gm rd

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

  15. A.
    Both A and R are correct and R is correct explanation for A
    B.
    Both A and R are correct but R is not correct explanation for A
    C.
    A is correct R is wrong
    D.
    A is wrong R is correct

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

  17. A.
    VCE >
    B.
    VCE < VCC
    C.
    VCE < 2VCC
    D.
    VCE <

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

  19. A.
    zero
    B.
    very low
    C.
    low
    D.
    high