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The phenomenon known as "Early Effect" in a bipolar transistor refers to a reduction of theeffective base-width caused by
- a)electron-hole recombination at the base
- b)the reverse biasing of the base -collector junction
- c)the forward biasing of emitter -base junction
- d)the early removal of stored base charge during saturation-to-cutoff switcing
Correct answer is option 'B'. Can you explain this answer?
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The phenomenon known as "Early Effect" in a bipolar transistor...
As you increase the collector Base reverse biasing the depletion width increase wich results in decrease in the effective Base width called as early effect or Base width modulation
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The phenomenon known as "Early Effect" in a bipolar transistor...
The Early Effect in a Bipolar Transistor
Explanation:
Bipolar Transistor Basics:
- A bipolar transistor consists of three layers: the emitter, base, and collector.
- The base region is typically lightly doped compared to the emitter and collector regions.
Early Effect:
- The Early Effect, also known as the base-width modulation effect, refers to a decrease in the effective base width as the collector-base voltage increases.
- This effect reduces the base current and affects the transistor's performance.
Causes of the Early Effect:
- The reduction of the effective base width is primarily caused by the reverse biasing of the base-collector junction.
- As the collector-base voltage increases, the depletion region widens, shrinking the base width.
- This narrowing of the base width results in a decrease in the transit time of charge carriers through the base region.
Effect on Transistor Performance:
- The Early Effect can lead to a decrease in the current gain of the transistor, which affects its amplification capabilities.
- It also affects the frequency response and can introduce distortion in the output signal.
- Designers must consider the Early Effect when designing transistor circuits to ensure proper performance.
Therefore, the correct answer is B: the reverse biasing of the base-collector junction.
The phenomenon known as the "Early Effect" in a bipolar transistor refers to a reduction of the effective base-width caused by:
Explanation:
Bipolar Transistor Basics:
- A bipolar transistor consists of three layers: the emitter, base, and collector.
- The base region is typically lightly doped compared to the emitter and collector regions.
Early Effect:
- The Early Effect, also known as the base-width modulation effect, refers to a decrease in the effective base width as the collector-base voltage increases.
- This effect reduces the base current and affects the transistor's performance.
Causes of the Early Effect:
- The reduction of the effective base width is primarily caused by the reverse biasing of the base-collector junction.
- As the collector-base voltage increases, the depletion region widens, shrinking the base width.
- This narrowing of the base width results in a decrease in the transit time of charge carriers through the base region.
Effect on Transistor Performance:
- The Early Effect can lead to a decrease in the current gain of the transistor, which affects its amplification capabilities.
- It also affects the frequency response and can introduce distortion in the output signal.
- Designers must consider the Early Effect when designing transistor circuits to ensure proper performance.
Therefore, the correct answer is B: the reverse biasing of the base-collector junction.
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The phenomenon known as "Early Effect" in a bipolar transistor refers to a reduction of theeffective base-width caused bya)electron-hole recombination at the baseb)the reverse biasing of the base -collector junctionc)the forward biasing of emitter -base junctiond)the early removal of stored base charge during saturation-to-cutoff switcingCorrect answer is option 'B'. Can you explain this answer?
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