User`s guide

7-4 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Measurement Units and Functions
Measurement Units
SMU - Source Monitor Unit
SMU can force a constant voltage, constant current, pulse voltage, or pulse current,
and can measure a dc current or dc voltage. Only one SMU can be set to pulsed
source.
Figure 7-2 shows a simplified SMU circuit diagram. SMU has the following three
modes:
• voltage source and current monitor mode (V source and I monitor mode)
• current source and voltage monitor mode (I source and V monitor mode)
• source common mode
Figure 7-2 Simplified SMU Circuit Diagram