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DC I-V Curves Application Software
(MT993G Option)

The MT993G option to the MT993A/B/C application software provides for automatic measurement and display of device DC current-voltage curves. For FET devices, the measurement display is a family of output current versus output voltage curves with input voltage as the parameter. For bipolar devices, the measured display is a family of output current versus output voltage curves with input current as the parameter. A maximum dissipation value can be entered which will cause each sweep to terminate when that condition is reached.

DC Characterization of RF and microwave devices is often desirable and can provide valuable information on specific devices. Measurement of the DC characteristics can reveal manufacturing and performance anomalies. Unlike instruments such as curve tracers, which can be used to perform detailed and extensive RF testing, DC testing within the automated tuner system (ATS) environment allows the device under test (DUT) to be properly terminated at various RF frequencies during testing. If they are not properly terminated, some devices will oscillate, and may fail catastrophically, under certain bias conditions.

Figure 8-1 shows DC current-votage curves as displayed by Maury's Windows® 98/2000/XP compatible noise and power characterization software.