Agilent Technologies B1500A Training Manual page 43

200 Volt Sweep (400 Volt with 2 HPSMUs)
Two SMUs in Series
Base current = 0
or leave open
Base
Const.
VAR1'
SMU1
I=0
200 V BVceo
Higher voltages are necessary to observe breakdown conditions, such as BVceo. In the case of
BVceo the base must be open (no SMU) or the SMU must be set as a current source with I=0.
One SMU must sweep in a positive direction while the other sweeps in a negative direction. The
result is a floating measurement with double the differential voltage. A resistor is used in the next
few slides to demonstrate a 200 V sweep.
Note: Using two HPSMUs, it is possible to sweep a total of 400 Volts.
Collector
Emitter
VAR1
SMU2
SMU3
V=0 to -100
V=0 to 100
5-23
WARNING
V1 V2
VAR1'
VAR1
SMU2
SMU1
V=0 to -100
V=0 to 100
200 V Resistor Sweep
Module 5
Basic Measurement