Exp7 - Canada College Engineering Department ENGR 261 Lab Report 12/May/2008 Experiment#7 Experimental X-Y Display Techniques Diode Applications By

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Canada College Engineering Department ENGR 261 Lab Report 12/May/2008 Experiment #7 Experimental X-Y Display Techniques: Diode Applications By Tam, Wilson Chi-Hang (G00621273)
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Experiment #7 : Experimental X-Y Display Techniques: Diode Applications Purpose: The purpose of this experiment is to study the use of the X-Y display capabilities of the cathode- ray tube (CRT) oscilloscope. By this, we are to set the oscilloscope to display a voltage against another voltage on both X and Y axis opposed what we have been doing for the past experiments before. We are then to determine and understand the current-to-voltage characteristics of semiconductor diodes and their applications. By doing so we can learn how a diode operates and how it behaves throughout time because the two diodes that we used for lab are different from each other as one has no breakdown voltage (a pn-junction diode) and the Zener diode. Throughout the lab, we will observe the performance of clipper, regulator, filter, and rectifier circuits as examples of diode wave-shaping circuits. 1.) Voltage Clipper circuits are a circuit that which removes the peak of a waveform. 2.) Voltage Regulator is an electrical regulator is used to maintain a constant voltage. 3.) Electronic Filters performs signal processing functions, specifically intended to remove unwanted signal components and/or enhance wanted ones. 4.) Rectifier converts AC current to DC current. Background Information on Diodes: Diode is a two-terminal device. It has two active electrodes between which the signal of interest may flow, and most are used for their unidirectional current property. The directionality of current flow most diodes exhibit is sometimes generically called the rectifying property. The most common function of a diode is to allow an electric current to pass in one direction (called the forward biased condition) and to block it in the opposite direction (the reverse biased condition). Thus, the diode can be thought of as an electronic version of a check valve. Real diodes do not display such a perfect on-off directionality but have a more complex non-linear electrical characteristic, which depends on the particular type of diode technology. Diodes also have many other functions in which they are not designed to operate in this on-off manner. There are many different types of diodes available for use. The ones we will be using in the lab:
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Figure A: a Regular Diode Figure B: a Zener Diode Theory: We will be constructing circuits with both a regular diode and a Zener diode along with other passive elements such as resistors, capacitors, and inductors to setup circuit schemes that we mentioned above and with explanation and circuit scheme diagrams below. The type of circuits that we will construct depends on the additional passive elements in the circuit such as capacitor, inductor, and resistor. 1.) Clipper: is a circuit that which removes the peak of a waveform.
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This note was uploaded on 10/12/2008 for the course ENGR 215 taught by Professor Enriquez during the Spring '08 term at San Mateo Colleges.

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Exp7 - Canada College Engineering Department ENGR 261 Lab Report 12/May/2008 Experiment#7 Experimental X-Y Display Techniques Diode Applications By

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