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Analog-designs Questions Set 87:

Quiz Mode

An n-channel JFET has I_DSS = 1 mA and V_p = -5 V. What is its maximum transconductance?

0.1 millimho

0.4 millimho

1.0 millimho

4.0 millimho

Solution:

What is the relation between the efficiency of class B and class A power amplifiers:

class B < class A

class B > class A

class B = class A

class A > class B

Solution:

Calculate the closed loop gain of an amplifier if a negative feedback factor β of 0.1 is used and the open loop gain of the amplifier is 175.

9.46

4.82

Solution:

Crossover distortion behavior is characteristic of which output stage?

Class B output stage

Class AB output stage

Class A output stage

Common base output stage

Solution:

What happens to the drain current of a MOSFET if the channel length of the MOSFET is reduced?

Increases

No change

Increases for a while and then decreases

Decreases

Solution:

Which of the following pulse modulation techniques is analog?

Pulse Code Modulation (PCM)

Differential Pulse Code Modulation (DPCM)

Pulse Width Modulation (PWM)

Delta Modulation

Solution:

A band-pass signal has significant frequency component in the range of 1.5 MHz to 2 MHz. If the signal is to be reconstructed from its samples, the minimum sampling frequency will be

Solution:

A step-down transformer is used to reduce the main supply of 220 V to 10 V. If the primary current is 5 A and the secondary current is 100 A, calculate the efficiency of the transformer.

96%

91%

84%

75%

Solution:

For an NMOSFET operating in the saturation region:

a. What is the effect on the drain current if the width of the MOSFET is increased?

b. What is the effect on the drain current if VDS is increased (assuming LAMBDA ≠ 0)?

a. Increases
b. Increases

a. Decreases
b. Increases

a. Increases
b. Decreases

a. Decreases
b. Decreases

Solution:

There is an amplifier with a voltage gain of 60 dB and an output impedance Z_o = 12 kΩ. It is required to modify the output impedance to 600 Ω by applying negative feedback. Calculate the value of the feedback factor. Also, find the percentage change in the overall gain for a 10% change in the gain of the internal amplifier.

0.5%

1.5%

Analog-designs Questions Set 87:

An n-channel JFET has I_DSS = 1 mA and V_p = -5 V. What is its maximum transconductance?

Solution:

What is the relation between the efficiency of class B and class A power amplifiers:

Solution:

Calculate the closed loop gain of an amplifier if a negative feedback factor β of 0.1 is used and the open loop gain of the amplifier is 175.

Solution:

Crossover distortion behavior is characteristic of which output stage?

Solution:

What happens to the drain current of a MOSFET if the channel length of the MOSFET is reduced?

Solution:

Which of the following pulse modulation techniques is analog?

Solution:

A band-pass signal has significant frequency component in the range of 1.5 MHz to 2 MHz. If the signal is to be reconstructed from its samples, the minimum sampling frequency will be

Solution:

A step-down transformer is used to reduce the main supply of 220 V to 10 V. If the primary current is 5 A and the secondary current is 100 A, calculate the efficiency of the transformer.

Solution:

For an NMOSFET operating in the saturation region:

a. What is the effect on the drain current if the width of the MOSFET is increased?

b. What is the effect on the drain current if VDS is increased (assuming LAMBDA ≠ 0)?

Solution:

Solution:

Related Question Sets:

Related Topics:

Analog-designs Questions Set 87:

An n-channel JFET has IDSS = 1 mA and Vp = -5 V. What is its maximum transconductance?

Solution:

What is the relation between the efficiency of class B and class A power amplifiers:

Solution:

Calculate the closed loop gain of an amplifier if a negative feedback factor β of 0.1 is used and the open loop gain of the amplifier is 175.

Solution:

Crossover distortion behavior is characteristic of which output stage?

Solution:

What happens to the drain current of a MOSFET if the channel length of the MOSFET is reduced?

Solution:

Which of the following pulse modulation techniques is analog?

Solution:

A band-pass signal has significant frequency component in the range of 1.5 MHz to 2 MHz. If the signal is to be reconstructed from its samples, the minimum sampling frequency will be

Solution:

A step-down transformer is used to reduce the main supply of 220 V to 10 V. If the primary current is 5 A and the secondary current is 100 A, calculate the efficiency of the transformer.

Solution:

For an NMOSFET operating in the saturation region: a. What is the effect on the drain current if the width of the MOSFET is increased? b. What is the effect on the drain current if VDS is increased (assuming LAMBDA ≠ 0)?

Solution:

Solution:

Related Question Sets:

Related Topics:

An n-channel JFET has I_DSS = 1 mA and V_p = -5 V. What is its maximum transconductance?

For an NMOSFET operating in the saturation region:

a. What is the effect on the drain current if the width of the MOSFET is increased?

b. What is the effect on the drain current if VDS is increased (assuming LAMBDA ≠ 0)?