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ECE :: Analog Electronics

Analog Electronics - Section 1
Analog Electronics - Section 2
Analog Electronics - Section 3
Analog Electronics - Section 4
Analog Electronics - Section 5
Analog Electronics - Section 6
Analog Electronics - Section 7
Analog Electronics - Section 8
Analog Electronics - Section 9
Analog Electronics - section-1
Analog Electronics - Section 10
Analog Electronics - Section 11
Analog Electronics - Section 12
Analog Electronics - Section 13
Analog Electronics - Section 14
Analog Electronics - Section 15
Analog Electronics - Section 16
Analog Electronics - Section 17
Analog Electronics - Section 18
Analog Electronics - Section 19
Analog Electronics - Section 20
Analog Electronics - Section 21
Analog Electronics - section-22
Analog Electronics - Section-23

  1. Consider 49 cascaded amplifiers having individual rise time as 2 n sec. 3 n sec. ... 50 n sec. The input waveform rise time is 1 n sec. Then the output signal rise time is given time by (Assume output signal rise time is measured within 10 percent range of the final output signal.)

    2. A.
    39 - 28 μsec
    B.
    2.28 μsec
    C.
    0.228 μsec
    D.
    39.28 μsec

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  2. The zener diode in the rectangular circuit shown in the figure has a zener voltage of 5.8 volts and a zener knee current of 0.5 mA. The maximum load current drawn from this circuit ensuring proper functioning over the input voltage range between 20 and 30 volts, is

    3. A.
    23.7 mA
    B.
    14.2 mA
    C.
    13.7 mA
    D.
    24.2 mA

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  3. In figure, ID = 4 mA. Then VDS =

    4. A.
    20 V
    B.
    16 V
    C.
    4 V
    D.
    0.4 V

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  4. In the circuit of figure diode will conduct

    5. A.
    from 90 to 180° in the positive half cycle
    B.
    from 30° to 180° in the positive half cycle
    C.
    from 50° to 160° in the positive half cycle
    D.
    from 30° to 150° in the positive half cycle

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  5. The input to integrating op-amp is a rectangular wave. The output will be

    6. A.
    a sine wave
    B.
    a rectangular wave
    C.
    a triangular wave
    D.
    none of the above

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  6. The most widely used diode rectifier circuit is

    7. A.
    half wave
    B.
    full wave with centre tapped transformer
    C.
    bridge
    D.
    either (a) or (b)

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  7. In figure, V0 =

    8. A.
    -1 V
    B.
    2 V
    C.
    +1 V
    D.
    +15 V

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  8. The main advantage of a crystal oscillator

    9. A.
    can oscillate any frequency
    B.
    gives a high output voltage
    C.
    frequency of oscillation is almost constant
    D.
    can operates at a low dc voltage

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  9. A full wave rectifier circuit using centre tapped transformer, the input frequency 50 Hz. The frequency of output is

    10. A.
    100 Hz
    B.
    50 Hz
    C.
    25 Hz
    D.
    none of the above

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  10. If the midband gain of an amplifier is 40 dB, the gain at half power frequency is

    11. A.
    37 dB
    B.
    30 dB
    C.
    20 dB
    D.
    13 dB

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