Agilent Technologies EasyEXPERT - Page 219

7 MixedSignal
7.5 G-Plot ConstVce Mismatch: Gummel characteristics mismatch, Vce=Const
(A.01.20)
[Supported Analyzer]
B1500A
[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, 4 terminals, 2 ea.
[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
BaseA: SMU connected to Device A Base terminal, primary sweep voltage output
BaseB: SMU connected to Device B Base terminal, synchronous sweep voltage output
VbStart: Sweep start voltage for Base terminal
VbStop: Sweep stop voltage for Base terminal
VbStep: Sweep step voltage for Base terminal
Emitter: SMU connected to Emitter terminal, constant voltage output
CollectorA: SMU connected to Device A Collector terminal, constant voltage output
CollectorB: SMU connected to Device B Collector terminal, constant voltage output
Vc: Collector voltage
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
BaseMinRng: Minimum range for the base current measurement
CollectorMinRng: Minimum range for the collector current measurement
[Measurement Parameters]
Collector current IcollectorA
Collector current IcollectorB
Base current IbaseA
Base current IbaseB
[User Function]
hfe_A=IcollectorA/IbaseA
hfe_B=IcollectorB/IbaseB
Delta_hfe=(hfe_A-hfe_B)/hfe_A*100
Delta_Icollector=(IcollectorA-IcollectorB)/IcollectorA*100
Agilent EasyEXPERT Application Library Reference, Edition 8
7-9