Also, using LTSPICE (which can be downloaded using the link on the syllabus) or

Question

Also, using LTSPICE (which can be downloaded using the link on the syllabus) or another kind of SPICE: a. Simulate a real diode's i-v characteristic. (There are lots of different diode part numbers in LTSPICE; to find them, place a generic diode in your circuit, right click on the diode, and click "Pick New Diode". Try to pick one with a reasonably small breakdown voltage.) The hard part of this problem may be to decide what range of voltages across the diode to simulate. Can you make your plot look like the classic i-v characteristic from lecture with breakdown, reverse bias, and forward bias regions all showing? b. Mark the breakdown voltage on the plot, and use the internet to find the diode's data sheet. Compare the breakdown voltage you see on your plot to what the data sheet says. c. Typically, the data sheet will show some plots with various views of the i-v characteristic. Try to recreate one plot from the data sheet. (This is practice in using the simulation and plotting tool features.) Turn in both your SPICE plot and the data sheet plot.

Explanation / Answer

Hi there

its great to help you

so to begin with

step 1: GO to the left most corner of LTSPICE window...for a new schematic

step 2:select component from the menu

step 3: first select voltage source

step 4: select resistor

step 5: select a diode of your choice

step 6:insert earthing components

step 7: connect one earthing terminal to volatge source and other the one end of resistor

step 8: connect one end of diode to voltage source and other to the remaining end of resistor

step 9:now all connections are set

step 10:click on resistor select appropriate value of resistor

step 11:click on diode select appropriate diode of your choice

step 12:click on voltage source. Now first make diode forward biased and run the simulations

step 13: note down the values and compare carefully check when the current(here current in milli amperes) start increasing rapidly...that point will be your threshold voltage in forward bias

step 14: after gettng results make diode reverse biased ...run the simulations

step 15: note down the values of current and note when current increases rapidly ..note that point as that will be your breakdown point. here current will be in microamperes

compare the results with the data sheet downladed from net of the diode under consideration.

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