Ambadee

In a common-emitter transistor configuration, the output is taken from which terminal?

• Emitter

• Collector

• Base

• Ground

Answer explanation

The output is taken from the collector terminal in a common-emitter configuration.

What is the threshold voltage for an n-channel MOSFET to turn on?

• 0V

• -2V

• +2V

• +10V

Answer explanation

An n-channel MOSFET requires a positive gate-source voltage above the threshold to conduct.

Which amplifier configuration provides the highest input impedance?

• Common Emitter

• Common Collector

• Common Base

• Differential

Answer explanation

The common collector configuration has high input impedance and low output impedance.

What is the function of a feedback network in an amplifier?

• Increase Gain

• Stabilize Gain

• Reduce Noise

• Change Frequency

Answer explanation

Feedback networks help stabilize the gain of amplifiers by controlling the output.

What is the main characteristic of a Zener diode?

• Forward bias only

• Reverse breakdown voltage

• High current gain

• Low resistance

Answer explanation

Zener diodes are designed to operate in reverse bias and maintain a constant voltage.

In a bipolar junction transistor (BJT), which region is the base?

• The heavily doped region

• The lightly doped region

• The collector region

• The emitter region

Answer explanation

The base is lightly doped to allow control of the larger current flowing from collector to emitter.

Which type of amplifier configuration is known for providing voltage gain?

• Common Collector

• Common Emitter

• Common Base

• Differential

Answer explanation

The common emitter configuration is widely used for its ability to provide significant voltage gain.

In Verilog, what does the 'always' block signify?

• A constant value

• A combinational logic

• A sequential logic

• A simulation directive

Answer explanation

The 'always' block is used to describe combinational logic behavior in Verilog

What is the maximum theoretical efficiency of a Class A amplifier?

• 50%

• 75%

• 100%

• 25%

Answer explanation

The maximum theoretical efficiency of a Class A amplifier is 50% due to the continuous conduction of current.

In a differential amplifier, what is the primary advantage of using a common-mode rejection ratio (CMRR)?

• Increase gain

• Reduce noise

• Improve linearity

• Enhance bandwidth

Answer explanation

CMRR measures the ability of the amplifier to reject common-mode signals, thus reducing noise.