Lecture 9 - Review on Diode Diode Convention Lecture 09...

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1 ECTE290 Spring 2007 Lecture 09 2 Review on Diode Diode Convention In solving diode problems, first guess and then test the following: a) Guess diode ON, set v D = 0, test if i D > 0 b) Guess diode OFF, set i D = 0, test if v D < 0 Diode State: a) ON Æ v D = 0, i D >0 b) OFF Æ i D = 0, v D <0 3 Outline: BJT (Bipolar Junction Transistor) Three Terminal Devices: Transistors BJT Fundamental Equations Three Working Regions DC Analysis– Common Emitter Circuit Transistor as an Amplifier or a Switch AC Analysis- Small Signal Model 4 The BJT (Bipolar Junction Transistor) Widely used in amplifiers and switching circuits. The BJT is a 3-terminal device, where a current or voltage on one terminal (the BASE) has a proportional influence on the current or voltage on another terminal (the COLLECTOR). Simply: Transistor
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