Download Lecture Notes: Electronics I (EENG 3510) by Dr. Shengli Fu at University of North Texas - and more Papers Electrical and Electronics Engineering in PDF only on Docsity! Dr. Shengli Fu Department of Electrical Engineering University of North Texas 1 Electronics I EENG 3510 Lecture 1 Shengli Fu Monday, August 27 2007 Dr. Shengli Fu Department of Electrical Engineering University of North Texas 2 Today • About me • Course Detail • Chapter 1 Signal Frequency spectrum of signal Amplifiers Dr. Shengli Fu Department of Electrical Engineering University of North Texas 5 Grading Policy • Grading serves two main purposes Motivate you to do the work required to learn Give others an indication of how well you know the material • Grading Homework (30%), Two midterms (40%), Final (30%) NOT Accepted if late The exams (midterms and final) are closed book with one page of note Passing this course will require significant effort and time! Dr. Shengli Fu Department of Electrical Engineering University of North Texas 6 Course Announcement • In class • Email: fu@egw.unt.edu • Web: http://www.ee.unt.edu/public/fu Dr. Shengli Fu Department of Electrical Engineering University of North Texas 7 Textbooks • Required: S. Sedra and Kenneth C. Smith, Microelectronic Circuits, Fifth Edition, Oxford University Press, 2004, ISBN 0195142519 • Reference: Richard Jaeger and Travis Blalock, Microelectronic Circuit Design, Second Edition, McGraw Hill, 2003, ISBN: 0072505036. • Prerequisites: EENG 2610 Circuit Analysis, basic calculus, and good level of algebra Dr. Shengli Fu Department of Electrical Engineering University of North Texas 10 Analog to Digital Converter 1 1 1 1 0 0 2...22 − −+++= N NbbbD Dr. Shengli Fu Department of Electrical Engineering University of North Texas 11 Frequency spectrum of signal • Any arbitrary function of time can be represented by its frequency spectrum through Fourier transform. In an other word, a voltage signal v(t) or a current signal i(t) can be represented by the sum of sin-wave signals of different frequencies and amplitudes. • A square wave is represented by the following Fourier series: ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ ++++= ...5sin 5 13sin 3 1sin4)( 000 ttt VVtv DC ωωωπ Dr. Shengli Fu Department of Electrical Engineering University of North Texas 12 Frequency spectrum of signal ω0=2π/T (rad/s) is the fundamental radian frequency and f0=1/T (Hz) is the fundamental frequency of the signal. 2f0, 3f0, 4f0 and called the second, third, and fourth harmonic frequencies. Dr. Shengli Fu Department of Electrical Engineering University of North Texas 15 Microelectronic Circuits - Fifth Edition Sedra/Smith Copyright © 2004 by Oxford University Press, Inc. Figure 1.14 (a) An amplifier transfer characteristic that shows considerable nonlinearity. (b) To obtain linear operation the amplifier is biased as shown, and the signal amplitude is kept small. Observe that this amplifier is operated from a single power supply, VDD. Nonlinear transfer characteristic and biasing Dr. Shengli Fu Department of Electrical Engineering University of North Texas 16 Microelectronic Circuits - Fifth Edition Sedra/Smith Copyright © 2004 by Oxford University Press, Inc. Figure 1.16 Symbol convention employed throughout the book. Total instantaneous quantities Lower case symbol + upper case subscript iA(t), vC(t) Direct current quantities Upper case symbol + upper case subscript IA, VC Incremental signal quantities Lower case symbol + lower case subscript ic(t), vc(t) Sine wave signal Upper case symbol + lower case subscript Ia, Vc Symbol convention Dr. Shengli Fu Department of Electrical Engineering University of North Texas 17 Homework (Due 09/05) • 1.6, 1.23, 1.40, 1.44, 1.47, 1.50 (for amplifier B, Rout = 100Ω, not 100KΩ), 1.67
