Lecture 1 - Webstaff.kmutt.ac.th - kmutt

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AC (Dynamic) Resistance In the forward bias region: 26 mV r ′ d = + r I D • The resistance depends on the amount of current (I D ) in the diode. • The voltage across the diode is fairly constant (26 mV for 25°C). • r B ranges from a typical 0.1 Ω for high power devices to 2 Ω for low power, general purpose diodes. In some cases r B can be ignored. B In the reverse bias region: ′ r d = ∞ The resistance is effectively infinite. The diode acts like an open. Electronic Devices and Circuit Theory, 10/e Robert L. Boylestad and Louis Nashelsky 22 Copyright ©2009 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 • All rights reserved.
Average AC Resistance r = av ΔV ΔI d d pt. to pt. AC resistance can be calculated using the current and voltage values for two points on the diode characteristic curve. Electronic Devices and Circuit Theory, 10/e Robert L. Boylestad and Louis Nashelsky 23 Copyright ©2009 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 • All rights reserved.
Page 1 and 2: Chapter 1: Semiconductor Diodes ©
Page 3 and 4: Semiconductor Materials Materials c
Page 5 and 6: Doping The electrical characteristi
Page 7 and 8: p-n Junctions One end of a silicon
Page 9 and 10: Diodes The diode is a 2-terminal de
Page 11 and 12: Diode Operating Conditions No Bias
Page 13 and 14: Forward Bias Diode Operating Condit
Page 15 and 16: Actual Diode Characteristics Note t
Page 17 and 18: Forward Bias Voltage The point at w
Page 19 and 20: IDEAL VERSUS PRATICAL Electronic De
Page 21: DC (Static) Resistance For a specif
Page 25 and 26: Diode Capacitance In reverse bias,
Page 27 and 28: Diode Specification Sheets Data abo
Page 29 and 30: Other Types of Diodes Zener diode L
Page 31 and 32: Light-Emitting Diode (LED) An LED e
Page 33: Homework Section 1.8 - 25, 27, 32 S

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