Berkeley PHYSICS 111 - Lab 3 Semiconductor Diodes (12 pages)

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Lab 3 Semiconductor Diodes



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Lab 3 Semiconductor Diodes

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Pages:
12
School:
University of California, Berkeley
Course:
Physics 111 - Modern Physics and Advanced Electrical Laboratory

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University of California at Berkeley Physics 111 Laboratory Basic Semiconductor Circuits BSC Lab 3 Semiconductor Diodes 2011 Copyrighted by the Regents of the University of California All rights reserved References Hayes Horowitz Horowitz Hill Lab notes Pages 65 69 71 74 76 78 Chapters 1 06 1 25 1 31 4 15 Appendix F Sections on Small Signal Input and Output Impedance in the Linear Circuit I lab Lab 3 Appendices See Main BSC manual pages This is the first of three labs on basic semiconductor components You will study semiconductor characteristics and some of their applications leading up to the design and construction of a differential amplifier Note Keep all your parts with you as they are for you permanently DO NOT RETURN THEM TO THE CABINETS This lab studies diodes You will find the relationship between the voltage and current in a diode and study temperature effects rectification nonlinear phenomena and frequency doubling NOTE This lab uses liquid nitrogen at a temperature 77K Use Safety Goggles provided in 111 Lab while doing this part of the BSC lab Pickup a free pair for your very own to keep Read the Cryogenic materials from EH S Have a GSI fill your Styrofoam cup with LN 2 at your BSC work station Before coming to class complete this list of tasks Completely read the Lab Write up Answer the pre lab questions utilizing the references and the write up Perform any circuit calculations or anything that can be done outside of lab Plan out how to perform Lab tasks Pre lab questions 1 In a few sentences explain what diodes are and how they are useful 2 Show that the 1 term in Eq 1 may be neglected for typical operating parameters V 0 1 V kT 1 40 eV Isat 10 9 A 3 Why is there a ripple on top of the DC voltage output by the circuit in 3 8 4 What is a load line used for What are the relative advantages of graphical and iterative analysis Disclaimer Please keep in mind that this lab is one of the most analysis plotting intensive labs Do not leave your analysis section



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