Ossila FACT1 User Manual page 28

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The Multiplexer measurement Unit can be used for stress-biased measurement whereby the devices
are kept under a bias stress between consecutive measurement cycles. During bias stress
operations, all or some of the Devices can be switched. In addition to the devices, up to two gate
Figure 10. The Multiplexer Measurement Unit used for stress biased
acquisition.
lines can be energised; however, this is deprecated because the application of both drain and gate
voltage to more than one devices can result in a total FET current exceeding the specification of the
multiplexer (100 mA). The current specifications of the NI USB 6501 limits the number of Drains and
Gates that can be switched ON to 22, see figure 10.
Due to the topology of the multiplexer network, only the following operations are possible:
1) Switch on/off a single device,
2) Switch on/off all the devices of a column
3) Switch on/off all the devices of a row
4) Switch on/off devices pairs
The pairs in point 4) are the ones that share the same column row selectors, see Table 3 and figure
11.
Table 3. Table showing pairs of Devices (shown with the same colour) which can be switched off
together when the Multiplexer Measurement Unit is used as a Lifetime Tester.
DEV 1
DEV 2
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DEV 6
DEV 7
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DEV 11
DEV 12
DEV 16
DEV 17
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