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Delta, Pulse Delta, and Differential Conductance
Model 6220/6221 Reference Manual
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Pulse Delta
Use the Keithley Model 2182A with the Model 6221 to run Pulse Delta.
Model 6221 measurement process
Pulse Delta measurements
For Pulse Delta, the Model 6221 outputs current pulses. Current pulses that have
a short pulse width are ideal to test a low-power DUT that is heat sensitive.
By default, Pulse Delta uses a 3-point repeating-average algorithm to calculate
readings. Each Pulse Delta reading is calculated using A/D measurements for a low
pulse, a high pulse, and another low pulse. The Model 6221 outputs the pulses and
the Model 2182A performs the A/D measurements. As shown in
, every
three pulses yields a single Pulse Delta voltage reading.
Figure 5-9
Pulse Delta 3-point measurement technique
Pulse Delta
Reading
1st
62xx
I-Source
2182A
A/D
C
I-High
I-Low
2B - A - C
(
1st Pulse Delta Reading
=
2
)
2Y - X - Z
(
Nth Pulse Delta Reading
=
2
)
2182A
A/D
A
2182A
A/D
B
2182A
A/D
E
2182A
A/D
F
2182A
A/D
X
2182A
A/D
Y
2182A
A/D
Z
1st Pulse Delta
Interval
2nd Pulse Delta
Interval
Nth Pulse Delta
Interval
Pulse Delta
Reading
Nth
2182A
A/D
D
Pulse Delta
Reading
2nd
High
Low
Low
High
Low
Low
High
Low
Low
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