01 - Semiconductor Devices

01 - Semiconductor Devices - EECS 320 Semiconductor Devices...

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EECS 320 Semiconductor Devices Adapted from Prof. J. Phillips’ EECS 320 slides
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Linear Circuits In EECS 215 you had learned of linear circuits In EECS 320, you will learn of important nonlinear devices: Diodes and transistors R 2 i C R 1 v in (t) L 2i L v C + - i L C v L + -
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Diode A one way valve for current flow I V Ideal I V Actual   1 / 0 kT qV e I I Anode Cathode + - V I
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Diode Applications Rectifier Power conversion Over-voltage protection Light emitter (light emitting diode LED) Light detector (photodiode, solar cell)
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Diode Rectifiers Half-wave rectifier Full-wave rectifier
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Light Sensitive Diodes Light-emitting Diode Semiconductor Laser Visible Light Sensor
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Constant Voltage Drop Model For Diodes Simple circuit analysis using constant voltage drop model V DD = 5 V mA R V I DD D 3 . 4 000 , 1 7 . 0 5 7 . 0 You will learn why V D ~0.7V in 320! R=1k W
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Transistor tran•sis•tor (trán - zìs’ter) A solid-state electronic device that is used to control the flow of electricity in electronic equipment and consists of a small block of a semiconductor with at least three electrodes Trans(fer) + (res)istor Idea: control large output with small input This device should exhibit gain T Input Output Source
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Transistor Types Bipolar (BJT) Field-effect (FET) In general, there are two types of transistors A three terminal device in which emitter to collector current is controlled by base current A transistor in which the output current is controlled by a variable electric field (gate voltage) I B I E I C B C E Collector Base Emitter Gate Drain Source Single device Integrated circuit
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Bipolar Transistor Operation B C I I I B I E I C B C E Collector Base Emitter E C dc I I ~
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This note was uploaded on 07/22/2011 for the course EECS 320 taught by Professor Sun during the Fall '10 term at University of Florida.

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01 - Semiconductor Devices - EECS 320 Semiconductor Devices...

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