Agilent Technologies EasyEXPERT, Manual, Page: 57 / 610

1 BJT
1.35 Re: Emitter resistance (flyback method, 4-terminal) (A.01.20)
[Supported Analyzer]
B1500A, 4155B, 4155C, 4156B, 4156C
[Description]
Measures the collector voltage vs base current characteristics, and extracts the Emitter resistance. Uses the
flyback method.
[Device Under Test]
Bipolar transistor, 4 terminals
[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
[Test Parameters]
IntegTime: Integration time
Base: SMU connected to Base terminal, primary sweep current output
IbStart: Sweep start current for Base terminal
IbStop: Sweep stop current for Base terminal
IbStep: Sweep step current for Base terminal
VbLimit: Base voltage compliance
Collector: SMU connected to Collector terminal, constant current output
Ic: Collector current
VcLimit: Collector voltage compliance
Emitter: SMU connected to Emitter terminal, constant voltage output
Subs: SMU connected to Substrate, constant voltage output
Vsubs: Substrate voltage
IsubsLimit: Substrate current compliance
[Extended Test Parameters]
Ve: Emitter voltage
HoldTime: Hold time
DelayTime: Delay time
EmitterMinRng: Minimum range for the emitter current measurement
SubsMinRng: Minimum range for the substrate current measurement
[Measurement Parameters]
Collector voltage Vcollector
[User Function]
Emitter current per emitter unit area IePerArea=Iemitter/Le/We
Base current per emitter unit area IbPerArea=Ibase/Le/We
Substrate current per emitter unit area IsPerArea=Isubs/Le/We
Emitter resistance Re=diff(Vcollector,Ibase)
[X-Y Plot]
X axis: Base current Ibase (LINEAR)
Y1 axis: Collector voltage Vcollector (LINEAR)
Y2 axis: Emitter resistance Re (LINEAR)
Agilent EasyEXPERT Application Library Reference, Edition 8
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