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SeCTIon 5
Using Substrate Bias
•
: 0V
vstart
•
: 10V
vstop
•
: 100
vsteps
Finally, Node 2 SMUA, which provides substrate bias, is
programmed:
•
Source V
•
Local sensing
•
100mA compliance, autorange measure
•
: 1V
vsbsource
After the instruments have been set up, the outputs are zeroed and
enabled . The substrate bias (V
5-10
) and first base current (I
SB
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
sweeps, one for each of five I
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
values must be adjusted accordingly .
B
values .
B
vs . V
C
CE
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