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Ansoft Designer / Ansys Designer 在线帮助文档:


Nexxim Simulator >
Nexxim Component Models >
FETs (JFETs and MESFETs) >
   EEHEMT Model (Level 15)       

EEHEMT Model (Level 15)

The .MODEL statement for the Level 15 High-Energy Mobility Transistor (EEHEMT) model specifies values for one or more model parameters.

.MODEL modelname NJF LEVEL=15 [modelparameter=]val] ...

or

.MODEL modelname PJF LEVEL=15 [modelparameter=]val] ...

LEVEL=15 specifies the EEHEMT model.

 


Level 15 EEHEMT Basic Model Parameters

Model Parameter

Description

Unit

Default

LEVEL

15 is required to select the EEHEMT model

None

1 (default if LEVEL parameter is omitted)

KMOD

Model version

None

1.0

KVER

Model version

None

1.0

ALPHA

Fitting parameter

Volt

0.5

C11o

C11 at saturation

Farad

1e-12

C11th

C11 below threshold

Farad

1e-15

C12sat

C12 at saturation

Farad

30e-15

CBS

Body-source capacitance

Farad

1e-15

CDSO

Drain-source capacitance

Farad

40e-15

CGDSAT

Gate-drain capacitance at saturation

Farad

20e-15

DELTDS

Gate charge partition parameter

Volt

0.4

DELTGM

Slope of transconductance dropoff

Siemens/Volt

0.15

DELTGMAC

AC slope of transconductance dropoff

Siemens/Volt

0.15

DELTGS

Gate charge partition parameter

Volt

0.35

GAMMA

Body effect parameter

Volt-1

0.001

GAMMAAC

AC body effect parameter

Second

0.001

GDBM

Drain-to-body conductance

Siemens

35e-6

GMMAX

Maximum transconductance

Siemens

0.25

GMMAXAC

Maximum transconductance

Siemens

0.25

IDSOC

Gate diode breakdown fitting parameter

Ampere

1.0

IS

Gate diode current

Ampere

15.0e-12

KAPA

Output conductance parameter

Volt-1

0.025

KAPAAC

Output conductance parameter

Volt-1

0.025

KBK

Gate diode breakdown constant

None

0.008119

KDB

Drain-body current parameter

None

88.8e-15

LAMBDA

Gate charge fitting parameter

Volt-1

0.035

MU

Fitting parameter

None

1.332e-10

N

Gate diode emission coefficient

None

1.5

NBR

Gate diode breakdown emission coefficient

None

5

NGF

Number of gate fingers

None

1

PEFF

Self-heating parameter

Watt

0.4

PEFFAC

Self-heating parameter

Watt

0.4

RD

Extrinsic drain resistance

Ohm

2.0

RDB

Drain-body resistance

Ohm

1.0e9

RG

Gate resistance

Ohm

2.0

RID

Intrinsic drain resistance

Ohm

0.1

RIS

Intrinsic source resistance

Ohm

6.0

RS

Extrinsic source resistance

Ohm

2.0

TAU

Delay of drain-source current

Second

8.3e-12

UGW

Unit gate width model

Meter

10e-6

VBA

Voltage defining area of operation

Volt

0.2

VBC

Voltage defining area of operation

Volt

0.44

VBR

Gate diode breakdown voltage

Volt

0.008119

VCH

Voltage at which output conductance is set by kappa

Volt

7.329

VCO

Start voltage of transconductance compression

Volt

1.3

VDELT

Not used

Volt

0.1

VDELTAC

Not used

Volt

0.1

VDSM

Fitting parameter for drain-body current

Volt

10

VDSO

Voltage at which the drain-source model collapses to a single voltage dependency in Vgs

Volt

2.0

VGO

Vgs of peak transconductance

Volt

0.65

VINFL

Threshold voltage in charge model

Volt

0.44

VSAT

Saturation voltage

Volt

0.45

VTO

Threshold voltage

Volt

0.1

VTOAC

Threshold voltage in AC

Volt

0.1

VTSO

Subthreshold onset voltage

Volt

-10

VTSOAC

Subthreshold onset voltage

Volt

-10


 

Note 

The instance parameter UGW overrides the model parameter UGW in setting the gate width.

The instance parameter N sets the number of instances, and does not override the model parameter N (gate diode emission coefficient).

 


Level 15 EEHEMT Temperature Model Parameters

Model Parameter

Description

Unit

Default

RGTC

Linear temperature coefficient for RG

 

0.0

RDTC

Linear temperature coefficient for RD

 

0.0

RSTC

Linear temperature coefficient for RS

 

0.0

VTOTC

Linear temperature coefficient for VTO

 

0.0

GMMAXTC

Linear temperature coefficient for GMMAX

 

0.0

XTI

Saturation current temperature coefficient

 

3.0

VINFLTC

Linear temperature coefficient for VINFL

 

0.0

GAMMATC

Linear temperature coefficient for GAMMA

 

0.0

VTOACTC

Linear temperature coefficient for VTOAC

 

0.0

GMMAXACTC

Linear temperature coefficient for GMMAXAC

 

0.0

GAMMAACTC

Linear temperature coefficient for GAMMAAC

 

0.0

TNOM

Nominal temperature coefficient for RG

°C

25.0


 

EEHEMTT Model Netlist Example

.MODEL eehemt15 NJF LEVEL=15

+

+

+

+

 




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