Model 6220/6221 Reference Manual
Applications
E-5
Return to
Figure E-3
Diode curves
Transistor characterization
The Model 622x can be used with a Keithley 24xx SourceMeter to characterize a
device’s electrical DC parameters. Such a test system for a BJT is shown in
.
The Model 622x current source can be configured to sweep a number of base cur-
rents for the test. The Model 24xx SourceMeter is configured to sweep voltage
and measure current. External triggering (Trigger Link) is used between the two
instruments to synchronize the testing process.
When the test is started, the Model 622x will output the first base current and
send a trigger pulse to the SourceMeter to start its operations. The SourceMeter
will run the voltage sweep and measure current at each sweep point. After the
sweep is complete, the SourceMeter sends a trigger to the Model 622x to output
the next base current. This back and forth triggering between the two instruments
will continue until all the collector I-V curves at the different base current levels are
acquired.
100µA
10µA
100pA
0.1V
0.2V
0.3V
0.4V
0.5V
0.6V
V
F
A = 1N914
B = 1N4007
C = 1N645
D = 2N4392 (gate-to-source)
A
B
C
D
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Summary of Contents for 6220
Page 16: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 24: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 453: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
