Agilent Technologies EasyEXPERT Manual page 121

3.1 BJT GummelPlot: Bipolar transistor gummel characteristics (A.01.20)
[Supported Analyzer]
B1500A, 4155B, 4155C, 4156B, 4156C
[Description]
Measures the gummel characteristics of bipolar transistor.
[Device Under Test]
Bipolar junction transistor
[Device Parameters]
Polarity: NPN (SMUs force the specified value) or PNP (SMUs force the negative specified value).
Le: Emitter length
We: Emitter width
Temp: Temperature
IcMax: Collector current compliance
Pmax: Power compliance
[Test Parameters]
IntegTime: Integration time
Base: SMU connected to Base terminal, primary sweep voltage output
VbStart: Sweep start voltage for Base terminal
VbStop: Sweep stop voltage for Base terminal
VbStep: Sweep step voltage for Base terminal
Collector: SMU connected to Collector terminal, constant voltage output
Vc: Collector voltage
Emitter: SMU connected to Emitter terminal, constant voltage output
[Extended Test Parameters]
Ve: Emitter voltage
HoldTime: Hold time
DelayTime: Delay time
BaseMinRng: Minimum range for the base current measurement
CollectorMinRng: Minimum range for the collector current measurement
[Measurement Parameters]
Base current Ibase
Collector current Icurrent
[User Function]
IePerArea=Iemitter/Le/We
IbPerArea=Ibase/Le/We
IcPerArea=Icollector/Le/We
hfe=Icollector/Ibase
[Analysis Function]
hfemax=max(hfe)
[X-Y Plot]
X axis: Base voltage Vbase (LINEAR)
Y1 axis: Base current Ibase (LOG)
Y2 axis: Collector current Icollector (LOG)
Y3 axis: Current amplificaiton factor hfe (LINEAR)
[User Function]
Emitter current per unit area of Emitter IePerArea
Base current per unit area of Emitter IbPerArea
Collector current per unit area of Emitter IcPerArea
[Parameters Display Area]
hfe maximum value hfemax
Agilent EasyEXPERT Application Library Reference, Edition 8
3 Discrete
3-3