5-6 Keysight B1505A User’s Guide, Edition 12Measurement ExamplesGate Charge Measurement• “Packaged Device Testing Using Resistive Load on the N1259A-014 orN1265A-014”• “On-Wafer Auto-Testing Using Current Load Transistor on the N1274A”• “On-Wafer Auto-Testing Using Resistive Load on the N1274A”• “On-Wafer Auto-Testing Using Current Load Transistor on the N1275A”• “On-Wafer Auto-Testing Using Resistive Load on the N1275A”Packaged Device Testing Usin g Current Load Transistoron the N1259A-014 or N1265A-014Preparing Measurement SetupUsed Application Test: Qg (High Id + High Vds+ JESD24-2)1. Specify an approximate expected total gate charge value to the QgMaxXAxisparameter and specify an expected threshold voltage to the VgsTh parameter.2. Specify the Off voltage and On current to the VdsOff and IdOn parametersaccording to your switching condition.3. Specify the measurement range of the gate voltage using the VgsOff and VgsOnparameters. If a resistor is directly connected to the DUT gate terminal in seriesfor preventing oscillation, specify the resistance value of the resistor to theRgDUT parameter.4. Specify the gate voltage range of the transistor for the current load using theLoadVgsOff and LoadVgsOn parameters. For the LoadVgsOff parameter, specifya gate voltage that the transistor is perfectly turned off. For the LoadVgsOnparameter, specify a gate voltage that the transistor is perfectly turned on. Bothvoltages should be within the maximum rating voltage of the transistor.
