09/16/2010© 2010 NTUST Electronics and Electrical Circuit ( 電子電路 ) Yu-Chi Lai 賴祐吉 Webpage: Office: E Office Hour: Mon, 9:00AM ~ 11:00AM or by appointment 何柏輝、傳星諭 Office: RB-507

09/16/2010© 2010 NTUST Administrations Mainhttp://graphics.csie.ntust.edu.tw/courses/index.php/EE2011S/ Main Slides and assignments are online Thomas L. Floyd. Electronics Fundamentals: Circuits, Devices, and Applications, 8th ed, Prentice Hall, Inc., 2010( 高立圖書代理 )

09/16/2010© 2010 NTUST Grading (approximate) 60% in 6 Quizes 20% in 3 Projects 20% class participation Everyone must write up their own project

09/16/2010© 2010 NTUST Projects There will be three projects for the course –Project 1: Wheatstone bridge –Project 2: Series RCL time response –Project 3: Common-emitter circuit You must submit all three in order to pass the course –This rule has never been waived You must write everything in C or C++. Project Due on Monday. TA will check whether you have copied the code from others’.

09/16/2010© 2010 NTUST09/16/2010© 2010 NTUST Rules You must write your own project. You must participate the class to get the 20% points You cannot copy codes from your classmates and your friends who took this class before. –If I find out, you will fail the class and face the penalty from school. The notes are in English.

09/16/2010© 2010 NTUST Very large and very small numbers are represented with scientific and engineering notation. 47,000,000 = 4.7 x 10 7 (Scientific Notation) = 47 x 10 6 (Engineering Notation) Scientific and Engineering Notation

09/16/2010© 2010 NTUST = 2.7 x (Scientific Notation) = 27 x (Engineering Notation) = 6.05 x (Scientific Notation) = 605 x (Engineering Notation) Scientific and Engineering Notation

09/16/2010© 2010 NTUST Most scientific calculators can be placed in a mode that will automatically convert any decimal number entered into scientific notation or engineering notation. Metric Conversions Numbers in scientific notation can be entered in a scientific calculator using the EE key. Metric Conversions

09/16/2010© 2010 NTUST length mass time electric current temperature luminous intensity amount of substance meter kilogram second ampere Kelvin candela mole m kg s A K cd mol Quantity Unit Symbol SI Funamdental Units

09/16/2010© 2010 NTUST current charge voltage resistance power ampere coulomb volt ohm watt ACVWACVW Except for current, all electrical and magnetic units are derived from the fundamental units. Current is a fundamental unit. Quantity Unit Symbol Some Important Electrical Units

09/16/2010© 2010 NTUST peta tera giga mega kilo P T G M k Can you name the prefixes and their meaning? Engineering Metric Prefixes

09/16/2010© 2010 NTUST milli micro nano pico femto m  n p f Can you name the prefixes and their meaning? Engineering Metric Prefixes

09/16/2010© 2010 NTUST When converting from a larger unit to a smaller unit, move the decimal point to the right. Remember, a smaller unit means the number must be larger M  = 470 k  Larger number Smaller unit Metric Conversions

09/16/2010© 2010 NTUST When converting from a smaller unit to a larger unit, move the decimal point to the left. Remember, a larger unit means the number must be smaller. Metric Conversions 10,000 pF = 0.01  F Smaller number Larger unit Metric Conversions

09/16/2010© 2010 NTUST When adding or subtracting numbers with a metric prefix, convert them to the same prefix first. Metric Arithmetic 10,000  + 22 k  = 10,000  + 22,000  = 32,000  Alternatively, 10 k  + 22 k  = 32 k  Metric Arithmetic

09/16/2010© 2010 NTUST When adding or subtracting numbers with a metric prefix, convert them to the same prefix first. Metric Arithmetic 200  mA = 200  A + 1,000  A = 12,000  A Alternatively, m  mA = 1.2 mA Metric Arithmetic

09/16/2010© 2010 NTUST Experimental uncertainty is part of all measurements. Error is the difference between the true or best accepted value and the measured value. Accuracy is an indication of the range of error in a measurement. Error } Precision is a measure of repeatability. Precise, but not accurate. Error, Accuracy and Precision

09/16/2010© 2010 NTUST When reporting a measured value, one uncertain digit may be retained but other uncertain digits should be discarded. Normally this is the same number of digits as in the original measurement. Assume two measured quantities are and If the larger is divided by the smaller, the answer is 2.69 because the answer has the same uncertainty as the original measurement. Significant Digits

09/16/2010© 2010 NTUST Rules for determining if a reported digit is significant are: 1.Nonzero digits are always considered to be significant. 2.Zeros to the left of the first nonzero digit are never significant. 3.Zeros between nonzero digits are always significant. 4.Zeros to the right of the decimal point for a decimal number are significant. 5.Zeros to the left of the decimal point with a whole number may or may not be significant depending on the measurement. Significant Digits

09/16/2010© 2010 NTUST 1.If the digit dropped is greater than 5, increase the last retained digit by 1. 2.If the digit dropped is less than 5, do not change the last retained digit. 3.If the digit dropped is 5, increase the last retained digit if it makes it even, otherwise do not. This is called the "round-to- even" rule. Rounding is the process of discarding meaningless digits. Rules for rounding are: Rounding Numbers

09/16/2010© 2010 NTUST Do not work alone, or when you are drowsy. Do not wear conductive jewelry. Know the potential hazards of the equipment you are working on; check equipment and power cords frequently. Avoid all contact with energized circuits; even low voltage circuits. Maintain a clean workspace. Know the location of power shutoff and fire extinguishers. Don’t have food or drinks in the laboratory or work area. Safety is always a concern with electrical circuits. Knowing the rules and maintaining a safe environment is everyone’s job. A few important safety suggestions are: Electrical Safety

09/16/2010© 2010 NTUST Engineering notation Exponent  Metric prefix Power of ten A system for representing any number as a one-, two-, or three-digit number times a power of ten with an exponent that is a multiple of three. The number to which a base is raised. A symbol that is used to replace the power of ten in numbers expressed in scientific or engineering notation. A numerical representation consisting of a base of 10 and an exponent; the number 10 raised to a power. Key Terms

09/16/2010© 2010 NTUST Scientific notation Accuracy Precision Significant digit An indication of the range of error in a measurement. A measure of the repeatability (consistency) of a series of measurements. A digit known to be correct in a number. A system for representing any number as a number between 1 and 10 times a power of ten. Key Terms

09/16/2010© 2010 NTUST 1. A number written as 2.59 x 10 7 is said to be in a. scientific notation b. engineering notation c. both of the above d. none of the above Quiz

09/16/2010© 2010 NTUST 2. The electrical unit that is fundamental is the a. volt b. ohm c. coulomb d. ampere Quiz

09/16/2010© 2010 NTUST 3. In scientific notation, the number is written a. 5.6 x 10 4 b. 5.6 x c. 56 x d. 560 x Quiz

09/16/2010© 2010 NTUST 4. In engineering notation, the number is written a. 5.6 x 10 4 b. 5.6 x c. 56 x d. 560 x Quiz

09/16/2010© 2010 NTUST 5. The metric prefix nano means a b c d Quiz

09/16/2010© 2010 NTUST 6. The metric prefix pico means a b c d Quiz

09/16/2010© 2010 NTUST 7. The number 2700 MW can be written a. 2.7 TW b. 2.7 GW c. 2.7 kW d. 2.7 mW Quiz

09/16/2010© 2010 NTUST 8. The value 68 k  is equal to a. 6.8 x 10 4  b. 68, 000  c M  d. All of the above Quiz

09/16/2010© 2010 NTUST 9. The sum of 330 mW W is a mW b W c W d W Quiz

09/16/2010© 2010 NTUST 10. Precision is a measurement of a. the total error in a series of measurements b. the consistency of a series of measurements c. both of the above d. none of the above Quiz

09/16/2010© 2010 NTUST Answers: 1. a 2. d 3. b 4. d 5. c 6. d 7. b 8. d 9. d 10. b Quiz