PN Junction Diode ENGI 242 ELEC 222. January 2004ENGI 242/ELEC 2222 PN Junction Diode Diode Model Analysis –Ideal –Approximation –Exact Diode Specification.

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Presentation transcript:

PN Junction Diode ENGI 242 ELEC 222

January 2004ENGI 242/ELEC 2222 PN Junction Diode Diode Model Analysis –Ideal –Approximation –Exact Diode Specification Sheets Diode Resistance –Static Resistance R D –Dynamic Resistance r d –Average Resistance r dav Diode Characteristic Curves Simulation

January 2004ENGI 242/ELEC 2223 Ideal diode: (a) symbol; (b) characteristics.

January 2004ENGI 242/ELEC 2224 Conduction state of the ideal diode based on the applied bias

January 2004ENGI 242/ELEC 2225 Typical Diode Curves

January 2004ENGI 242/ELEC 2226 Forward Bias Curve is Exponential

January 2004ENGI 242/ELEC 2227 Diode Response vs Temperature

January 2004ENGI 242/ELEC 2228 Semiconductor Diode Characteristics

January 2004ENGI 242/ELEC 2229 Determining the dc Resistance

January 2004ENGI 242/ELEC r d - the Dynamic (ac) Resistance

January 2004ENGI 242/ELEC Determining r d - the ac Resistance at Q

January 2004ENGI 242/ELEC Determining r d - the ac Resistance

January 2004ENGI 242/ELEC r dav – the Average ac Resistance Draw line through 2 points +V P and -V P

January 2004ENGI 242/ELEC Circuit to display the V - I characteristics

January 2004ENGI 242/ELEC PSpice Model Editor – D1N914 Parameters

January 2004ENGI 242/ELEC DC Sweep Simulation Settings

January 2004ENGI 242/ELEC PSpice plot of forward bias at 25°C

January 2004ENGI 242/ELEC DC Sweep Simulation Settings Note First select Edit Pspice Model, and change IBV to 10

January 2004ENGI 242/ELEC PSpice generated plot characteristics at 25°C This Probe output shows both forward and reverse breakdown

January 2004ENGI 242/ELEC PSpice Netlist Output Part 1

January 2004ENGI 242/ELEC PSpice Netlist Output Part 2

Diode Circuit Analysis ENGI 242 ELEC 222

January 2004ENGI 242/ELEC Diode Circuit Analysis –Graphical Analysis using Loadlines –Analytical Analysis using KVL and KCL LEDs Zener Diodes Diode Resistance –Static Resistance R D –Dynamic Resistance r d –Average Resistance r dav Diode Characteristic Curves Simulation

January 2004ENGI 242/ELEC Series Diode Configuration

January 2004ENGI 242/ELEC Drawing a Load Line to Find the Q Point.

January 2004ENGI 242/ELEC Diode Circuit and Characteristics.

January 2004ENGI 242/ELEC Load Line Example

January 2004ENGI 242/ELEC Determining the Unknown Network Quantities

January 2004ENGI 242/ELEC Network Example

January 2004ENGI 242/ELEC Determining the Unknown Network Quantities

January 2004ENGI 242/ELEC Network Example

January 2004ENGI 242/ELEC Zener Diode Equivalents

January 2004ENGI 242/ELEC Basic Zener Regulator

January 2004ENGI 242/ELEC Determining the State of the Zener

January 2004ENGI 242/ELEC The Zener Equivalent Circuit Operation

January 2004ENGI 242/ELEC Zener Diode Regulator

January 2004ENGI 242/ELEC Determining V for the Regulator

January 2004ENGI 242/ELEC Q-Point for the Network

January 2004ENGI 242/ELEC Network in the conducting state