Agilent Technologies EasyEXPERT, Manual, Page: 56 / 610

1 BJT
1.34 Re+Rc: Collector resistance (including Emitter resistance, flyback method,
4-terminal) (A.01.20)
[Supported Analyzer]
B1500A, 4155B, 4155C, 4156B, 4156C
[Description]
Measures the collector voltage vs collector current characteristics, and extracts the combined resistance of the
collector resistance and 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
Collector: SMU connected to Collector terminal, primary sweep current output
IcStart: Sweep start current for Collector terminal
IcStop: Sweep stop current for Collector terminal
IcStep: Sweep step current for Collector terminal
VcLimit: Collector voltage compliance
Base: SMU connected to Base terminal, constant current output
Ib: Base current
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
VbLimit: Base voltage compliance
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]
IePerArea=Iemitter/Le/We
IbPerArea=Ibase/Le/We
IsPerArea=Isubs/Le/We
Rc_Re=diff(Vcollector,Icollector)
[X-Y Plot]
X axis: Collector current Icollector (LINEAR)
Y1 axis: Collector voltage Vcollector (LINEAR)
Y2 axis: Combined resistance of Collector resistance and Emitter resistance
Agilent EasyEXPERT Application Library Reference, Edition 8
1-40