Agilent Technologies EasyEXPERT, Manual, Page: 40 / 610

1 BJT
1.18 G-Plot ConstVce[3]: Gummel characteristics, Vce=constant, 3-terminal
(A.01.20)
[Supported Analyzer]
B1500A, 4155B, 4155C, 4156B, 4156C
[Description]
Measures the collector current vs base voltage characteristics and the base current vs base voltage
characteristics, extracts the current amplification factor hfe, and plots the gummel characteristics.
[Device Under Test]
Bipolar transistor, 3 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
IcMax: Collector current 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]
Collector current Icollector
Base current Ibase
[User Function]
IbPerArea=Ibase/Le/We
IcPerArea=Icollector/Le/We
hfe=Icollector/Ibase
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 amplification factor hfe (LINEAR)
[Parameters Display Area]
Current amplification factor maximum value hfeMax
Agilent EasyEXPERT Application Library Reference, Edition 8
1-24