Download EE216 Electronics Lecture Notes - Fall 2011 and more Slides Electronics in PDF only on Docsity! 1 EE216 Electronics -1 Lecture 23 docsity.com EE-216 ELECTRONICS -I EE216 Fall 2011 2 Acknowledgement: The author of these slides acknowledges that most of the slides used in this course have been taken from the course material provided in the CD accompanying the two text books mentioned below. Some of the slides have been modified and some new slides have been added. The author would like to appreciate and give full credit to the efforts of the original creator of the slides and would categorically mention that the material used is purely for academic purpose and not whatsoever for commercial use. No commercial use of these slides is either intended and all those accessing this material are advised to use this material only for academic non-commercial purpose. Microelectronic Circuits Sixth Edition, by Sedra, Smith Oxford University Press Fundamentals of Microelectronics, by Behzad Razavi, John Wiley & Sons Inc Modified by Assistant Professor Saleem Iftekhar, SEECS NUST docsity.com BJT Circuits at DC Cut-off Mode EBJ >> Reverse Biased CBJ >> Reverse Biased docsity.com BJT Circuits at DC Active Mode EBJ >> Forward Biased CBJ >> Reverse Biased docsity.com BJT Circuits at DC Saturation Mode EBJ >> Forward Biased CBJ >> Forward Biased docsity.com Practice Problem #1 Find the highest voltage that the base can be raised while the transistor remains in active mode. Assume that ≈ . (Ex D5-22) Note: Done on the board docsity.com Example 5.5 For the above circuit β=50. Find all the node voltages and branch currents. docsity.com Solution to Example 5.5 (Example 5.5 Note: Quickly explained on board one part and referred to the book for second part) = − . × . = . = . − = − . BJT in Saturation Mode docsity.com Example 5.7 (PNP) For the above circuit β=100. Find currents and voltages. NOTE: Just mention about differences for PNP, student to attempt themselves since is solved in the book docsity.com +10 V
A | 10 — 0.7
2
2x03
»—o +0.7 V qd)
= 4.65 mA (2)
$—o -10+46x1=-54V @)
$1 K0
GB) 0.99 x 4.65 = 4.6 mA |
Y
-10V
docsity.com
For the above circuit β=100. Find currents and voltages. NOTE: Student to attempt themselves Example 5.8 docsity.com For the above circuit β=100. Find currents and voltages. (Example 5.10) NOTE: On the board, just show the step to find Thevenin’s equivalent circuit at the base Example 5.10 docsity.com (Example 5.10) NOTE: on Board show how to find currents in the equivalent circuit and then in potential divider network. Example 5.10(Contd) docsity.com
