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IEE-Lec3 Transistors - Lecture 3 Transistors Introduction...

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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 1 Lecture 3: Transistors Introduction to some broadly useful concepts in Electrical and Computer Engineering
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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 2 Review Voltage, Current Ohm’s Law Kirchoff’s Laws for Voltage and Current Equivalent Resistance Series Combinations Parallel Combinations Diode I-V Characteristics
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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 3 V I R = Ohm’s Law Kirchoff’s Voltage Law Kirchoff’s Current Law V = 0 I I I N O U T = Series Equivalent R R R R E Q N = + + + 1 2 . . . Parallel Equivalent 1 1 1 1 1 2 R R R R E Q N = + + + . . .
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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 4 0 R1 1k V1 FREQ = 10k VAMPL = 1 VOFF = 0 V R2 1k R3 1k V R R R R R k k k k k E Q 1 2 3 2 3 1 1 1 1 0 5 = + = + = . I V R R V k m A E Q = + = = 1 1 1 1 5 0 6 7 . .
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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 5 Ti me 0s 50us 100us 150us 200us 250us 300us 350us 400us V( R1: 1) V( R1: 2) - 1. 0V 0V 1. 0V Voltage Across R EQ1 V I R m A k V E Q = = = 1 0 6 7 0 5 0 3 3 . . .
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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 6 Resistor V-I Characteristic Resistors obey Ohm’s Law Voltage is proportional to Current Voltage vs. Current is a straight line V( R1: 1) - V( R1: 2) - 6. 0V - 4. 0V - 2. 0V 0V 2. 0V 4. 0V 6. 0V I ( R1) - 10mA - 5mA 0A 5mA 10mA V- I Char act er i st i c of a 500 Ohm Resi st or V I R =
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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 7 Diode V-I Characteristic For ideal diode, current flows only one way Real diode is close to ideal Ideal Diode
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05/12/09 Intro to Engineering Electronics STOLEN FROM K. A. Connor 8 Transistor: A Combination of 2 Diodes
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