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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:] 21 May 2014 14:41 Doug Mercer [Hardware Setup:] 20 May 2014 16:20 Doug Mercer [Schottky Diode Fundamentals:] 16 Jun 2013 03:53 Doug Mercer created Next revision Previous revision 21 May 2014 14:41 Doug Mercer [Hardware Setup:] 20 May 2014 16:20 Doug Mercer [Schottky Diode Fundamentals:] 16 Jun 2013 03:53 Doug Mercer created Line 54: Line 54: q = electronic charge = 1.6 * 10<​sup>​-19​ C\\ q = electronic charge = 1.6 * 10<​sup>​-19​ C\\ f<​sub>​B​ = barrier height in volts\\ f<​sub>​B​ = barrier height in volts\\ - k = Boltzman'​s constant = 1.37 * 10<​sup>​\$s\$-\$s\$ 23​ J/K\\ + k = Boltzman'​s constant = 1.37 * 10<​sup>​-23​ J/K\\ n = ideality factor (forward slope factor, determined by metal-semiconductor interface) n = ideality factor (forward slope factor, determined by metal-semiconductor interface) Line 101: Line 101: ===== 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,​ 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,​ 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: =====