Agilent Technologies EasyEXPERT

1 BJT
1.24 hfe-Vbe Vbc=0V: hfe-Ic characteristics, Vbc=0 (A.01.20)
[Supported Analyzer]
B1500A, 4155B, 4155C, 4156B, 4156C
[Description]
Measures the collector current vs emitter voltage characteristics and the base current vs emitter voltage
characteristics, extracts the current amplification factor hfe, and plots the hfe-Ic characteristics.
[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
IcMax: Collector current compliance
[Test Parameters]
IntegTime: Integration time
Base: SMU connected to Base terminal, constant voltage output
Collector: SMU connected to Collector terminal, constant voltage output
Emitter: SMU connected to Emitter terminal, primary sweep voltage output
VeStart: Sweep start voltage for Emitter terminal
VeStop: Sweep stop voltage for Emitter terminal
VeStep: Sweep step voltage for Emitter terminal
Subs: SMU connected to Substrate terminal, constant voltage output
Vsubs: Substrate voltage
IsubsLimit: Substrate current compliance
[Extended Test Parameters]
Vb: Base voltage
Vc: Collector 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)
[Analysis Function]
Ic@hfeMax=@L1X (X intercept of Line1)
[X-Y Plot]
X axis: Collector current Icollector (LOG)
Y1 axis: Current amplification factor hfe (LINEAR)
[Parameters Display Area]
Current amplification factor maximum value hfeMax
Collector current at hfeMax Ic@hfeMax
[Auto Analysis]
Line1: Vertical line through Y1 data at hfe=hfeMax
Agilent EasyEXPERT Application Library Reference, Edition 8
1-30