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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

  3. Ebers Moll model is applicable to

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

  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

  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

  9. Pick the Odd one out

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

  11. The circuit of figure is called

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

  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)

  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

  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

  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