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university:courses:eps:diode-curves [16 Jun 2013 03:53]
Doug Mercer created
university:courses:eps:diode-curves [21 May 2014 14:41] (current)
Doug Mercer [Hardware Setup:]
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 q = electronic charge = 1.6 * 10<​sup>​-19</​sup>​ C\\ q = electronic charge = 1.6 * 10<​sup>​-19</​sup>​ C\\
 f<​sub>​B</​sub>​ = barrier height in volts\\ f<​sub>​B</​sub>​ = barrier height in volts\\
-k = Boltzman'​s constant = 1.37 * 10<​sup>​$s$-$s$ 23</​sup>​ J/K\\+k = Boltzman'​s constant = 1.37 * 10<​sup>​-23</​sup>​ J/K\\
 n = ideality factor (forward slope factor, determined by metal-semiconductor interface) n = ideality factor (forward slope factor, determined by metal-semiconductor interface)
  
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 ===== Hardware Setup: ===== ===== Hardware Setup: =====
  
-The waveform generator should be configured for a 100 Hz triangle wave with 3 volt amplitude and 0 volt offset. The differential input of scope channel 2 (2+,2-) is used to measure the current in the resistor (and diode). The single ended input of scope channel 1 (1+) is used to measure the voltage across the diode (1- input is grounded). The Scope should be setup with channel 1 at 500mV per division and channel 2 set also at 500mV per division. The current flowing through the diode, I<​sub>​D</​sub>,​ is the voltage measured by channel 2 divided by the resistor value (100 in this example). Use the XY display mode to plot the voltage across the diode (scope channel 1) on the X axis vs. the current in the diode (scope channel 2) on the Y axis.+The waveform generator should be configured for a 100 Hz triangle wave with 3 volt amplitude and 0 volt offset. The differential input of scope channel 2 (2+,2-) is used to measure the current in the resistor (and diode). The single ended input of scope channel 1 (1+) is used to measure the voltage across the diode (1- input is grounded). The Scope should be setup with channel 1 at 500mV per division and channel 2 set also at 500mV per division. The current flowing through the diode, I<​sub>​D</​sub>,​ is the voltage measured by channel 2 divided by the resistor value (100 Ω in this example). Use the XY display mode to plot the voltage across the diode (scope channel 1) on the X axis vs. the current in the diode (scope channel 2) on the Y axis.
  
 ===== Procedure: ===== ===== Procedure: =====
university/courses/eps/diode-curves.1371347638.txt.gz · Last modified: 16 Jun 2013 03:53 by Doug Mercer