BJT- Collector Feedback Configuration | Quiz # 256

In this video, the solution of Quiz # 256 is provided.
Here is the detail of the Quiz.
Subject: Analog Electronics
Topic: BJT/ Bipolar Junction Transistor
The link for the DC Analysis and Small Signal Analysis (AC Analysis) of Collector Feedback Bias
1) Collector Feedback Bias:
• BJT: Collector Feedbac...
2) BJT- Small Signal Analysis: Collector Feedback Configuration
• BJT- Small Signal Anal...
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The Quiz will be helpful to all the students of science and engineering for preparing for university or competitive exams (GATE, IES, RRB JE, etc.)
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[@allaboutelectronics-quiz]

The link for the DC Analysis and Small Signal Analysis (AC Analysis) of Collector Feedback Bias 1) Collector Feedback Bias: kzbin.info/www/bejne/paTLeH-Ei9uGatk 2) BJT- Small Signal Analysis: Collector Feedback Configuration kzbin.info/www/bejne/Y5yVmHSlZqadrJY

[@JITENDRAKUMAR-sg9xz]

Thank you Sir, for taking this question . You solved a long-standing doubt of mine 🤗

[@justpaulo]

What if the 1st Avb is "small" (

[@allaboutelectronics-quiz]

Yes,

[@bhargavmarathe8920]

3:04 what is the Avb and Av ? If both are voltage gains then how there be huge difference ? one being 413 and other being 9 ?

[@allaboutelectronics-quiz]

Avb is the ratio of Vo / Vb while Av is Vo / Vin. For more information, please go through this video. You will understand it completely. BJT- Small Signal Analysis: Collector Feedback Configuration kzbin.info/www/bejne/Y5yVmHSlZqadrJY

[@ythearthcker575]

Sir Vt ki value kaise pata chala h

[@k_A_ElishaJacobNDumari]

Sir where is the value of Vt as 26 coming from?

[@allaboutelectronics-quiz]

Vt is thermal voltage. It is defined as kT/q. Where, K is Boltzmann's constant, T is temperature in Kelvin and q is the charge of electron. I hope, it will clear your doubt.

[@chidanandadatta4695]

5:50 Why Rs is not included in input impedance.

[@allaboutelectronics-quiz]

Rs is the external series resistor. In this case, the input impedance is the impedance seen through the base and the emitter terminal. If we have been asked to find the input impedance seen through the source Vin, then it would have been included. In that case, Zin' = Rs + Zin I hope it will clear your doubt.