Capacitive Effects in Diodes and Special Types - EECE 310 Lecture 12
Explore the intricacies of capacitive effects in diodes and various special diode types discussed in EECE 310 Lecture 12 by Prof. Ayman Kayssi. Delve into topics such as the width of the depletion region, depletion capacitance, and unique diode variants like Varactor Diodes and Schottky Diodes. Gain insights into the complex world of semiconductor devices.
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Presentation Transcript
EECE 310 - Lecture 12 Prof. Ayman Kayssi
Outline Capacitive Effects in Diodes Special Diode Types 2 EECE 310 - Fall 2019
Outline Capacitive Effects in Diodes Special Diode Types 3 EECE 310 - Fall 2019
Capacitive Effects in Diodes Width of depletion region: 2 1 1 = + + V ( ) s W V dep o R q N N A D ??= ???????????? ?? ?? ?0= ????? ?? ????????? ??= ??????? ??????? ???? 4 EECE 310 - Fall 2019
Capacitive Effects in Diodes A Depletion Capacitance: = C s dep W dep C jo V = C j + 1 R V o 1 q N N = C A s A D where jo + 2 V N N o A D C jo = In general: C where n=0.5 but may go down to 1/3 j V 1 ( + m R ) V o 5 EECE 310 - Fall 2019
Outline Capacitive Effects in Diodes Special Diode Types 6 EECE 310 - Fall 2019
Special Diode Types Varactor Diodes: variable capacitor Light Emitting Diode (LED) 7 EECE 310 - Fall 2019
Special Diode Types Opposite Photodiode produces current Schottky Diode: Metal Semiconductor Diode - - Fast Drops ~ 0.4 V when conducting 8 EECE 310 - Fall 2019
Thank you ! 9 EECE 310 - Fall 2019
