EE_10_F07_Lecture 1 - UCLA ELECTRICAL ENGINEERING...

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UCLA E LECTRICAL E NGINEERING D EPARTMENT : EE 10: C IRCUIT A NALYSIS 1 L ECTURE 1 LECTURE NOTES: OCTOBER 1, 2007 OUTLINE LECTURE NOTES ....................................................................................................................... 2 HOMEWORK DUE OCT 11, 2007 BEFORE CLASS: ............... ERROR! BOOKMARK NOT DEFINED. INTRODUCTION TO ELECTRONIC CIRCUIT PRINCIPLES ........................................... 2 Electronic Circuits .................................................................................................................. 2 Engineering System Models .................................................................................................... 2 System Components ................................................................................................................. 3 Circuit Models ......................................................................................................................... 3 Problem Solving ...................................................................................................................... 3 CIRCUIT MODEL EXAMPLES ................................................................................................ 4 Biomedical Electronics: Electrocardiogram ........................................................................... 4 Robotics Technology: Simple Motor Speed Control ............................................................... 4 IMPORTANT ASSUMPTIONS REGARDING ELECTRONIC CIRCUIT MODELS ........ 5 ELECTRONIC QUANTITIES AND UNITS ............................................................................. 5 C HARGE ....................................................................................................................................... 5 V OLTAGE ..................................................................................................................................... 6 C URRENT ..................................................................................................................................... 6 CIRCUIT ELEMENTS ................................................................................................................ 8 P OLARITY .................................................................................................................................... 8 SIGN AND POLARITY CONVENTIONS ............................................................................... 10 CRITICAL DEFINITION: THE PASSIVE SIGN CONVENTION ...................................... 10 POSITIVE AND NEGATIVE CHARGE FLOW .................................................................... 11 POWER ........................................................................................................................................ 12 P OLARITY OF P OWER T RANSFER ............................................................................................... 12 EXAMPLE: POWER .................................................................................................................. 14 EXAMPLE: POSITIVE AND NEGATIVE CHARGE FLOW .............................................. 14 CURRENT VOLTAGE CHARACTERISTICS ....................................................................... 15 RANGE OF VALUES OF CURRENT, VOLTAGE, AND POWER ..................................... 15 V OLTAGE R ANGE ...................................................................................................................... 15 C URRENT R ANGE ....................................................................................................................... 16 P OWER R ANGE ........................................................................................................................... 16 REVIEW ...................................................................................................................................... 17 1
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