전자회로(기말고사 문제지)2009-2
Download as DOC, PDF0 likes486 views
This document contains instructions for solving problems related to an amplifier circuit and designing an inverting op-amp. It asks the reader to: 1) Calculate the equivalent Thevenin circuit for the base of Q1, 2) Calculate the bias condition for Q1 given values of VBE and β, 3) Present the hybrid-Π model for Q1, and 4) Calculate the AC gain when capacitors are shorted. It also asks the reader to design an inverting op-amp with a gain of 20.
![2009 final-term examination (100)
Electronic Circuits
Date: December 22, 2009.
1. Consider the following amplifier circuit. (80)
1) Calculate the equivalent Thevenin circuit ( V BB , R BB ) for the base of Q1 in
terms of a DC bias circuit. (20)
2) Calculate the bias condition ( I C , VCE
) for the above circuit for
V = .7V , β 150
BE 0 = . (20)
3) Present the hybrid Π
model for Q1. (20) Hint:) VT = 25 [mV]
4) Get the AC gain [dB] ( A = 0 / Vi
V
) when capacitors are shorted. (20)
2. Design an inverting OP amp with Av =20
. (20)](https://image.slidesharecdn.com/testec20092-120925031342-phpapp01/85/2009-2-1-320.jpg)
전자회로(기말고사 문제지)2009-2
- 1. 2009 final-term examination (100) Electronic Circuits Date: December 22, 2009. 1. Consider the following amplifier circuit. (80) 1) Calculate the equivalent Thevenin circuit ( V BB , R BB ) for the base of Q1 in terms of a DC bias circuit. (20) 2) Calculate the bias condition ( I C , VCE ) for the above circuit for V = .7V , β 150 BE 0 = . (20) 3) Present the hybrid Π model for Q1. (20) Hint:) VT = 25 [mV] 4) Get the AC gain [dB] ( A = 0 / Vi V ) when capacitors are shorted. (20) 2. Design an inverting OP amp with Av =20 . (20)