7 MixedSignal
7.15 Id-Vg Mismatch: Id-Vg characteristics mismatch (A.01.20)
[Supported Analyzer]
B1500A
[Description]
Measures the drain current vs gate voltage characteristics of two MOSFETs, and plots the differences of them.
[Device Under Test]
MOSFET, 4 terminals, 2 ea.
[Device Parameters]
Polarity: Nch (SMUs force the specified value) or Pch (SMUs force the negative specified value).
Lg: Gate length
Wg: Gate width
Temp: Temperature
IdMax: Drain current compliance
[Test Parameters]
IntegTime: Integration time
Gate: SMU connected to Gate terminal, primary sweep voltage output
VgStart: Sweep start voltage for Gate terminal
VgStop: Sweep stop voltage for Gate terminal
VgStep: Sweep step voltage for Gate terminal
IgLimit: Gate current compliance
DrainA: SMU connected to the device A Drain terminal, constant voltage output
DrainB: SMU connected to the device B Drain terminal, constant voltage output
Vd: Drain voltage
Subs: SMU connected to Substrate, secondary sweep voltage output
VsubsStart: Sweep start voltage for Substrate terminal
VsubsStop: Sweep stop voltage for Substrate terminal
VsubsStep: Sweep step voltage for Substrate terminal
IsubsLimit: Substrate current compliance
Source: SMU connected to Source terminal, constant voltage output
[Extended Test Parameters]
Vs: Source voltage
HoldTime: Hold time
DelayTime: Delay time
DrainMinRng: Minimum range for the drain current measurement
GateMinRng: Minimum range for the gate current measurement
SubsMinRng: Minimum range for the Substrate current measurement
[Measurement Parameters]
Device A Drain current IdrainA
Device B Drain current IdrainB
Gate current Igate
Substrate current Isubs
[User Function]
gm_A=diff(IdrainA,Vgate)
gm_B=diff(IdrainB,Vgate)
Delta_Id=(IdrainA-IdrainB)/IdrainA*100
Delta_gm=(gm_A-gm_B)/gm_A*100
Agilent EasyEXPERT Application Library Reference, Edition 8
7-29
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