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ECE :: Analog Electronics

  1. Which of the following circuit can operate class AB for audio power output?

  2. A.
    Push pull
    B.
    Cascade
    C.
    Pull down
    D.
    Darlington pair

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  3. Ebers Moll model is applicable to

  4. A.
    bipolar Junction transistor
    B.
    N MOS transistor
    C.
    unipolar junction transistor
    D.
    field effect transistor

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  5. A FET

  6. A.
    has two P-N junctions
    B.
    has three P-N junctions
    C.
    depends on the variation of the depletion layer width with reverse voltage, for its operation
    D.
    depends on the variation of a magnetic field for its operation

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  7. For oscillations to starts, the loop gain A β of the oscillator must be initially

  8. A.
    less than unity
    B.
    0.5
    C.
    1.0
    D.
    more than unity

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  9. Pick the Odd one out

  10. A.
    MOSFET
    B.
    FET
    C.
    Planer transistor
    D.
    Unijunction transistor

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  11. The circuit of figure is called

  12. A.
    diode bias
    B.
    current mirror
    C.
    complementary mirror
    D.
    none of the above

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  13. If the changes in zener current in a voltage regulator circuit are too large, it can be corrected by using a

  14. A.
    emitter follower
    B.
    CE amplifier
    C.
    capacitor
    D.
    either (a) or (b)

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  15. MOS circuits as compared to bipolar circuits take

  16. A.
    more chip area
    B.
    less chip area
    C.
    same chip area
    D.
    none of these

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  17. Typical values of voltage gain for CE, CB and CC amplifiers are

  18. A.
    100, 100 and 1 respectively
    B.
    100, 1 and 100 respectively
    C.
    100, 1 and 1 respectively
    D.
    1, 100 and 100 respectively

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  19. The gate-source voltage that reduces the drain current to approximately zero is called

  20. A.
    gate-source on voltage
    B.
    gate-source voltage
    C.
    pinch-off voltage
    D.
    gate-source cut-off voltage

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