Diode Characterization - Keithley 6220 Reference Manual

E-4 Applications

Diode characterization

With the Model 622x, it is possible to plot I-V (current-voltage) characteristics of a
diode over several decades. A simple test system for diode characterization is
shown in
The Model 6514, with its high input resistance (>200TΩ in parallel with 20pF), will
allow the voltage measurement to be made accurately.
examples of diodes whose curves have been plotted using the test system shown
in Figure
NOTE
Figure E-2
Diode characterization test system
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Figure E-2.
E-2.
A standard DMM cannot be used to accurately measure the
voltage across the diode because its much lower input resis-
tance would cause loading error. However, a standard DMM
can be used to make the voltage measurement at the banana
jack GUARD terminal of the Model 622x (see
Guard," on page
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Model 6220/6221 Reference Manual
Figure E-3
2-12).
shows several
"Banana Jack