Agilent 4155B/4156B User’s Guide Vol.2, Edition 5 1-3
Measurement Units
Ground Unit (GNDU)
Ground Unit (GNDU)
The ground unit (GNDU) is in Agilent 41501A/B (SMU and pulse generator
expander). The GNDU is a 0 V constant source that provides a measurement ground
reference, and can sink up to ±1.6 A. Figure 1-1 shows a simplified GNDU circuit
diagram.
Figure 1-1 Simplified GNDU Circuit Diagram
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