Pulse Delta; Model 6221 Measurement Process - Keithley 6220 DC User Manual

Model 6220/6221 User's Manual

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
Figure
Figure 5-7
Pulse Delta 3-point measurement technique
1st Pulse Delta Reading
2nd Pulse Delta Reading
In cases where the high pulse will cause heating of the Device Under Test (DUT),
the measurement at the second low pulse could be adversely affected by the heat
caused by the high pulse. In that case, the measurement at the second low pulse
can be disabled. This does not change the overall timing of the pulse output. Elim-
inating the second low pulse measurement changes the basic calculation to the
following:
Pulse Delta = (2Y – 2X) / 2
5-7, every three pulses yields a single Pulse Delta voltage reading.
Pulse Delta
Reading
1st
Return to
Delta, Pulse Delta, and Differential Conductance 5-21
Pulse Delta
Reading
2nd
Nth Pulse Delta Reading
Section 5 topics
Pulse Delta
Reading
Nth