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For the given fixed-bias configuration, determine the parameters re & ro for its equivalent re  model of the transistor, if the input impedance of the network is 1 kΩ and the output impedance is 4 kΩ.
  • a)
    4.58 Ω, 29 kΩ
  • b)
    8.35 Ω, 84 kΩ
  • c)
    22.7 Ω, 96 kΩ
  • d)
    35 Ω, 130 kΩ
Correct answer is option 'C'. Can you explain this answer?
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For the given fixed-bias configuration, determine the parameters re&am...
The ac equivalent circuit for the network is given below.

The input impedance of the network is given as,

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For the given fixed-bias configuration, determine the parameters re&am...
Understanding Reverse Bias in Diodes
When a diode is reverse biased, it means that the voltage is applied in such a way that it prevents current from flowing through the diode. However, a small current can still flow, which is referred to as the reverse saturation current.
What is Reverse Saturation Current?
- Definition: The reverse saturation current is the small amount of current that flows through a diode when it is reverse biased.
- Magnitude: This current is typically very small, on the order of microamperes (μA) or less, depending on the diode's characteristics.
Causes of Reverse Saturation Current
- Minority Carriers: The reverse saturation current is primarily due to the movement of minority charge carriers in the diode. In a p-n junction, electrons from the p-side and holes from the n-side contribute to this small current.
- Temperature Dependency: The reverse saturation current increases with temperature because higher thermal energy generates more electron-hole pairs.
Importance of Reverse Saturation Current
- Diode Behavior: Understanding reverse saturation current is crucial for analyzing diode behavior in circuits, especially in applications like rectifiers and amplifiers.
- Breakdown Region: If the reverse voltage exceeds a certain threshold, known as the breakdown voltage, the diode can conduct a significant amount of current, which can lead to damage if not controlled.
Conclusion
In summary, the correct answer to the question is option 'C', reverse saturation current, as it accurately describes the small current that develops under reverse bias conditions in a diode. This understanding is essential for anyone studying Electronics and Communication Engineering.
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For the given fixed-bias configuration, determine the parameters re& rofor its equivalentremodel of the transistor, if the input impedance of the network is 1 kΩ and the output impedance is 4 kΩ.a)4.58 Ω, 29 kΩb)8.35 Ω, 84 kΩc)22.7 Ω, 96 kΩd)35 Ω, 130 kΩCorrect answer is option 'C'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2025 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about For the given fixed-bias configuration, determine the parameters re& rofor its equivalentremodel of the transistor, if the input impedance of the network is 1 kΩ and the output impedance is 4 kΩ.a)4.58 Ω, 29 kΩb)8.35 Ω, 84 kΩc)22.7 Ω, 96 kΩd)35 Ω, 130 kΩCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the given fixed-bias configuration, determine the parameters re& rofor its equivalentremodel of the transistor, if the input impedance of the network is 1 kΩ and the output impedance is 4 kΩ.a)4.58 Ω, 29 kΩb)8.35 Ω, 84 kΩc)22.7 Ω, 96 kΩd)35 Ω, 130 kΩCorrect answer is option 'C'. Can you explain this answer?.
Solutions for For the given fixed-bias configuration, determine the parameters re& rofor its equivalentremodel of the transistor, if the input impedance of the network is 1 kΩ and the output impedance is 4 kΩ.a)4.58 Ω, 29 kΩb)8.35 Ω, 84 kΩc)22.7 Ω, 96 kΩd)35 Ω, 130 kΩCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE). Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
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