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ECE :: Analog Electronics

  1. The bandwidth of an amplifier is BW, of n-stage of such as amplifier are cascaded, the bandwidth will become

  2. A.
    n BW
    B.
    C.
    D.

  3. If a class C power amplifier has an input signal with frequency of 200 kHz and the width of collector current pulses of 0.1 ms, then the duty cycle of the amplifier will be

  4. A.
    1%
    B.
    2%
    C.
    10%
    D.
    20%

  5. An ideal voltage amplifier should have

  6. A.
    low input impedance and high output impedance
    B.
    high input impedance and low output impedance
    C.
    high input impedance and high output impedance
    D.
    low input impedance and low output impedance

  7. The h parameter equivalent circuit of BJT has one voltage source and one current source.

  8. A.
    True
    B.
    False

  9. The voltage eo indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calculated?

  10. A.
    Bias current of inverting input only
    B.
    Bias current of inverting and non-inverting inputs only
    C.
    Input offset current only
    D.
    Both the bias currents and the I/P offset current

  11. In an RC-coupled amplifier for improving the low frequency response

  12. A.
    lower RL is provided
    B.
    more bias is used
    C.
    less gain is provided
    D.
    higher CC is used

  13. The circuit of figure is

  14. A.
    Precision integrator
    B.
    Hartley oscillator
    C.
    Butterworth high pass filter
    D.
    Wien bridge oscillator

  15. The minimum gate source voltage that creates the n-type inversion layer is called

  16. A.
    cut off voltage
    B.
    on voltage
    C.
    threshold voltage
    D.
    zener voltage

  17. In figure gain bandwidth product is

  18. A.
    200 Hz
    B.
    200 MHz
    C.
    200 kHz
    D.
    2 MHz

  19. Consider the following statements
    A totem pole configuration used in the output stage if an op-amp has the advantage of using

    1. Only n-p-n BJTs
    2. Complementary symmetrical pair of transistors
    3. Only one transistor
    Which of these statements is/are correct?

  20. A.
    1 alone
    B.
    2 alone
    C.
    3 alone
    D.
    1 and 3