lab9 - Lab 9 C.J. Gorrell Diodes ENME350 0102 Lab Partners:...

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Lab 9 C.J. Gorrell Diodes ENME350 0102 Lab Partners: 3/22/10
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Picture 2 I. Objective – To understand the properties/ characteristics of diodes and their applications II. Instruments Used A. Power Supply B. Function Generator C. Digital Multimeter D. Oscilloscope III. Parts Needed A. Breadboard B. 1Kohm, 10kohm resistors C. 1uF, 10uF capacitors D. Diode IN4007 IV. Current-Voltage Properties of a Diode A. Experimental Setup: After setting up the circuit below use a multimeter, to observe the current and voltage of the diode when the power supply is at the voltages from -3V to 5V in half steps. B. Data: Vs (volts) Id (mA) Vd (volts) -3 0 -3 -2.5 0 -2.5 -2 0 -2
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-1.5 0 -1.5 -1 0 -1 -.5 0 -.5 0 0 0 .5 .04 .46 1 .46 .55 1.5 1.25 .58 2 1.42 .6 2.5 1.92 .61 3 2.43 .62 3.5 2.94 .63 4 3.44 .64 4.5 3.91 .64 5 4.43 .65 C. Calculations: Vs= Vd +Vr D. Analysis- Theoretical plot of the diode current v. voltage
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Picture 3 Picture 4 The current/ voltage characteristics of the diode shows that when voltage is negative, the diode resists the flow of current, and when voltage is positive, the current increases exponentially with change in voltage. This matches the theoretical diode characteristics as can be seen when the experimental plot is compared to the theoretical plot. The two plots are very similar. If the supply voltage is less than zero, then the
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lab9 - Lab 9 C.J. Gorrell Diodes ENME350 0102 Lab Partners:...

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