User`s guide

Agilent B2900 User’s Guide, Edition 2 2- 9
Introduction
Source/Measure Unit
Source/Measure Unit
The source/measure unit (SMU) can apply voltage or current, and can measure
current or voltage.
Figure 2-1 shows a simplified SMU circuit diagrams. The SMU can perform the
following operations.
• Applies voltage and measures current
• Applies current and measures voltage
• Applies voltage and measures voltage
• Applies current and measures current
Figure 2-1 Simplified SMU Circuit Diagram
High Force
Chassis ground
V
A
+
-
+-
High Sense
4-wire connections
Low Sense
Low Force
High Force
Chassis ground
V
A
+
-
+-
Low Force
2-wire connections