Keithley 6430

Source-Measure Concepts 5-13
Voltage Limit
Load Line
Operating
Point
Current Source
Load Line
I-Source (I
S
)
I-Source (I
S
)
V-Meter
(V
M
)
V-Meter
(V
M
)
5V
10V
100mA
50
Ω
DUT Load Line (R)
A) Normal I-source operation
Voltage Limit
Load Line
Operating
Point
Current Source
Load Line
10V
100mA
B) I-source in compliance
50mA
200
Ω
DUT Load Line (R)
V-Meter = I
S
• R
= (100mA) (50Ω)
= 5V
I
S
= V
M
/ R
= 10V / 200Ω
= 50mA
Figure 5-6
I-Source operating
boundaries