DEVICE LAB EXP 01(Determination of Characteristic Curve of a Diode)-acs.docx

DEVICE LAB EXP 01(Determination of Characteristic Curve of a Diode)-acs.docx

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AIUB COURSE SOLUTION Omar Faruk Title: Determination of Characteristic Curve of a Diode Abstract: The objective of experiment 1 of the Electronic Devices Lab is to become familiar with semiconductor diode. The volt – ampere (I-V) characteristics of a diode give the variation of diode current with the voltage. This characteristic curve is essential to understand the behavior of a diode when it is connected to circuit. Introduction: A diode is one of the simplest electronic devices, which has the characteristic of passing current in only one direction. However, unlike a resistor, a diode does not behave linearly with respect to applied voltages (the diode has an exponential I-V relationship) and hence is not simply described by an equation such as Ohm’s law for resistors. The diode is considered a passive element; we do not expect it to amplify power. There are two operating regions for the diode, reverse biased region, and forward biased region. The diode is a semiconductor pn junction. In addition to being applied as a diode, the pn junction is the basic element of bipolar-junction transistors (BJTs) and field-effect transistors (FETs). Thus, an understanding of the physical operation of pn junctions is important to understand the operation of diodes. Theoretical Background: Diode Structure The semiconductor diode is a pn junction as shown in Fig. 01. As indicated, the pn junction consists of p-type semiconductor material in contact with n-type semiconductor material. A variety of semiconductor materials can be used to form pn junctions like silicon, germanium, or gallium arsenide...etc. However, we will concentrate on silicon, as
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  • Summer '16
  • ARNOB ZAHID
  • pn junction, PN Junction Diode, Diode IV Characteristics

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