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Analog-designs Questions Set 14:

Quiz Mode

For a feedback amplifier, what is the optimum phase margin that gives the gain of 1/beta?

30°

120°

60°

-60°

Solution:

If the output of an amplifier is 10 V and 100 mV is fed back to the input, then the feedback fraction is:

0.01

0.1

Solution:

V to I converters are used for

DC and AC voltmeters

Photo device testing

DC and AC voltmeters, and diode testing

AM communication

Solution:

Typically, the gain of the inverting amplifier will be in the range of

20,000 to 200,000

2,000 to 20,000

200 to 2,000

200,000 to 2,000,000

Solution:

A signal that has variable amplitude must have a linear power amplifier.

is complex

has variable frequency

is linear

has variable amplitude

Solution:

A series R-L circuit has a resistance of 5.6 Ω and the inductance is 3.85 H. Find the time constant.

0.6875 seconds

1.4545 seconds

21.56 seconds

1 second

Solution:

In which of the following regions does the Gate Oxide Capacitance, Cgb (capacitance between Gate and Bulk), become Zero.

Cut-off

Both Option 1 and 2

Both Option 1 and 3

All three regions (Linear, Cut-off, and Saturation)

Linear

Saturation

Solution:

The drain of a MOSFET is connected to a voltage supply of 1.8V, and the source is grounded. If the applied input to the MOSFET is 1V and the threshold voltage (Vt) is 0.5V, what is the region of operation of the MOSFET?

Saturation

Linear

Cut-off

Both cut-off and linear

Solution:

In an n-type semiconductor, the Fermi level lies 0.30 eV below the conduction band at 300 K. If the temperature is raised to 330 K, find the new position of the Fermi level.

0.20 eV below conduction band

0.33 eV below conduction band

0.33 eV above the conduction band

0.20 eV above the conduction band

Solution:

In a CRT, a pair of deflecting plates are 2 cm long and are spaced 0.5 cm apart. The distance from the center of the plates to the screen is 224 cm. The final anode voltage is 1000 V. What is the angle that the beam makes with the axis of the tube when emerging from the field?

3° 26'

4° 28'

2° 27'

5° 26'

Analog-designs Questions Set 14:

For a feedback amplifier, what is the optimum phase margin that gives the gain of 1/beta?

Solution:

If the output of an amplifier is 10 V and 100 mV is fed back to the input, then the feedback fraction is:

Solution:

V to I converters are used for

Solution:

Typically, the gain of the inverting amplifier will be in the range of

Solution:

A signal that has variable amplitude must have a linear power amplifier.

Solution:

A series R-L circuit has a resistance of 5.6 Ω and the inductance is 3.85 H. Find the time constant.

Solution:

In which of the following regions does the Gate Oxide Capacitance, Cgb (capacitance between Gate and Bulk), become Zero.

Solution:

The drain of a MOSFET is connected to a voltage supply of 1.8V, and the source is grounded. If the applied input to the MOSFET is 1V and the threshold voltage (Vt) is 0.5V, what is the region of operation of the MOSFET?

Solution:

In an n-type semiconductor, the Fermi level lies 0.30 eV below the conduction band at 300 K. If the temperature is raised to 330 K, find the new position of the Fermi level.

Solution:

In a CRT, a pair of deflecting plates are 2 cm long and are spaced 0.5 cm apart. The distance from the center of the plates to the screen is 224 cm. The final anode voltage is 1000 V. What is the angle that the beam makes with the axis of the tube when emerging from the field?

Solution:

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