2606B System SourceMeter® Instrument Reference Manual
Section 4: Theory of operation
2606B-901-01 Rev. B / May 2018
4-11
Figure 88: Current source operation in power compliance
The following figure shows a current sweep on a resistive load of 200
Ω
.
For this example, the
instrument is programmed to sweep current to 100 mA, limit voltage (6 V), and limit power (500 mW).
When sweeping, the actual source output varies according to the programmed source value until the
voltage limit is reached. As the figure shows, the output sources the programmed value until placed in
voltage compliance at the 6 V limit. The sweep then continues (programmed current source values
increase along the green sweep points line), but the output remains at the same value as when the
instrument went into voltage compliance. This continues until the programmed source value sweeps
to a high enough level that the power limit line is reached (500 mW). At this point, the voltage and the
current start to decrease, lowering the current and voltage values along the DUT load line. When the
last point is swept (100 mA), the actual output is 25 mA (at 5 V).
Figure 89: Current source sweep operation in voltage and power compliance