Bipolar Junction Transistor

What is a transistor and its basic function?

• A transistor is a type of resistor that stores electrical energy.

• A transistor is a semiconductor device that amplifies or switches electronic signals.

• A transistor is a mechanical device used for power generation.

• A transistor is a type of battery that provides energy storage.

Explain the common emitter configuration of a transistor.

• The common emitter configuration provides low voltage gain and high current gain.

• The common emitter configuration is used for digital logic circuits.

• In this configuration, the collector is common to both input and output.

• The common emitter configuration of a transistor is an amplifier setup where the emitter is common to both input and output, providing high voltage gain.

What are the main components of a transistor?

• Source, Drain, Substrate

• Anode, Cathode, Gate

• Positive, Negative, Neutral

• Emitter, Base, Collector

How does biasing affect the operation of a transistor?

• Biasing has no effect on the transistor's performance.

• Biasing increases the power consumption of a transistor.

• Biasing only affects the physical size of the transistor.

• Biasing affects the operation of a transistor by setting its operating point, ensuring it functions correctly in the desired region for amplification or switching.

What is the purpose of the base current in a transistor?

• The base current controls the transistor's operation and enables signal amplification.

• The base current is irrelevant to the transistor's function.

• The base current determines the physical size of the transistor.

• The base current is used to power the transistor directly.

Describe the input characteristics of a common emitter transistor.

• Linear relationship between input current and voltage

• High input impedance

• The input characteristics of a common emitter transistor include low input impedance, a base-emitter voltage of approximately 0.7V, and a nonlinear relationship between input current and voltage.

• Base-emitter voltage of 1.5V

What is the significance of the output characteristics in a CE transistor?

• The output characteristics are significant as they define the transistor's performance in amplification and switching applications.

• They indicate the color of the transistor's casing.

• They are only relevant in digital circuits.

• They determine the physical size of the transistor.

How do you calculate the current gain (β) of a transistor?

• β = Ic + Ib

• β = Vce / Ib

• β = Ie / Ic

• β = Ic / Ib

What are the advantages of using a common emitter configuration?

• Low voltage gain

• Advantages include high voltage gain, high input impedance, low output impedance, phase inversion, and ease of design.

• High output impedance

• Phase alignment

Explain the relationship between input and output in a CE transistor.

• The output current at the emitter controls the input current at the base.

• The input current at the base controls the output current at the collector, allowing for signal amplification.

• The input voltage at the collector determines the output voltage at the emitter.

• The base current has no effect on the collector current in a CE transistor.