Keithley Series 2600 User Manual

5-10
SECTION 5
Using Substrate Bias
vstart • : 0V
vstop • : 10V
vsteps • : 100
Finally, Node 2 SMUA, which provides substrate bias, is
programmed:
Source V•
Local sensing•
100mA compliance, autorange measure•
vsbsource • : 1V
After the instruments have been set up, the outputs are zeroed and
enabled. The substrate bias (V
SB
) and first base current (I
B
) values
are applied. Then, the collector-emitter voltage sweep begins. At
each point in the sweep, the collector current is measured. The
program enters the main program loop to perform five I
C
vs. V
CE
sweeps, one for each of five I
B
values.
Upon completion of the base current sweep, all outputs are
zeroed and disabled. The data is written to the Instrument Con-
sole of TSB.
5.4.5 Modifying Program 14
For different sweeps, the base current start, stop, step, and
the collector-emitter voltage start, stop, and step values can be
changed as required. For different sweep lengths, loop counter
values must be adjusted accordingly.

Keithley Series 2600 Specifications

General

Model	Series 2600
Measurement Functions	Voltage, Current, Resistance, Power
Resolution	Up to 6.5 digits
Current Source Range	Up to 10A
Communication Interfaces	GPIB, USB
Applications	Semiconductor testing
Category	Source Measure Unit (SMU)
Channels	Single or Dual Channel (varies by model)