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6-24
Source-Measure Concepts
2400 Series SourceMeter
®
User’s Manual
Voltage compliance boundaries
Where within the boundaries the SourceMeter operates depends on the load (DUT) that is
connected to its output.
Figure 6-11
shows operation examples for resistive loads that are
200
Ω
and 800
Ω
, respectively. For these examples, the SourceMeter is programmed to
source 100mA and limit 40V. (See
Section 3
, “
Basic source-measure procedure
.”)
In
Figure 6-11A
, the SourceMeter is sourcing 100mA to the 200
Ω
load and subsequently
measures 20V. As shown, the load line for 200
Ω
intersects the 100mA current source line
at 20V.
Figure 6-11B
shows what happens if the resistance of the load is increased to 800
Ω
. The
DUT load line for 800
Ω
intersects the voltage compliance limit line placing the
SourceMeter in compliance. In compliance, the SourceMeter will not be able to source its
programmed current (100mA). For the 800
Ω
DUT, the SourceMeter will only output
50mA (at the 40V limit).
Notice that as resistance increases, the slope of the DUT load line increases. As resistance
approaches infinity (open output), the SourceMeter will source virtually 0mA at 40V.
Conversely, as resistance decreases, the slope of the DUT load line decreases. At zero
resistance (shorted output), the SourceMeter will source 100mA at virtually 0V.
Regardless of the load, voltage will never exceed the programmed compliance of 40V.
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Содержание SourceMeter 2400
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