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Figure 2-3
DC Probes
The MOSFET contact pads for DC measurement shown in Figure 2-3, are more
popular than the RF contact pads shown in Figure 2-2. If device under test is
configured with DC contact pads, use DC probes instead of RF probes. The DC
probes are better suited for contact with the DC contact pads than the RF probes.
See Figure 2-3 for the contact pads and the DC probes. Required cables for
connecting the DC probes are provided as the option B1542A-026 DC probe cable
set. For more information, see "Connecting DC Probes" on page 2-18.
When using DC probes, minimum pulse width should be limited to approximately
60 nsec to 100 nsec.
Contact Pad and DC Probe Connection
to Test system
Terminator
DC probes
This makes a current return path
for the gate pulse signal.
This shorts Well and Source.
Agilent B1542A User's Guide, Edition 4
Drain
Gate
Signal
Gnd
Well
Source
Installation
DC Probes
to Test system
DC probes
This makes a current return path
for the drain current signal.
Signal
Gnd
2- 5
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