Product Documentation
Spectre Circuit Simulator Components and Device Models Reference
Product Version 23.1, June 2023

Component Statements

This device is supported within altergroups.

Instance Parameters

m=1.0

Multiplicity factor.

w=1.0e-06 m

Design width of varactor.

l=1.0e-06 m

Design length of varactor.

ngcon=1

Number of gate contacts.

dta=0.0 degC

Alias of DTA.

trise=0.0 degC

Alias of DTA.

dta=0.0 degC

Local temperature delta to ambient.

isnoisy=yes

Should device generate noise.
Possible values are yes and no.

Model Parameters

version=1.1

The available versions are 1.1, 1.2, and 1.3.

subversion=0.0

Model subversion.

revision=0.0

Model revision.

level=1000

Model level.

tmin=(-100.0) degC

Minimum reference/ambient temperature.

tmax=500.0 degC

Maximum reference/ambient temperature.

vmax=10000.0 V

Maximum voltage applied between nodes g and b.

tr=21.0 degC

Nominal (reference) temperature.

lmin=1.0e-08 m

Minimum allowed drawn length.

lmax=9.9e+09 m

Maximum allowed drawn length.

wmin=1.0e-08 m

Minimum allowed drawn width.

wmax=9.9e+09 m

Maximum allowed drawn width.

swres=1

Switch to control series resistance: 0=exclude and 1=include.

type=(-1)

Substrate   doping TYPE: -1=n-TYPE and +1=p-TYPE.

typep=(-1)

Polysilicon doping TYPE: -1=n-TYPE and +1=p-TYPE.

toxo=20.0e-10 m

Oxide thickness.

epsroxo=3.9

Relative permittivity.

tau=0.1 s

Time constant for inversion charge recombination/generation.

vfbo=0.0 V

Flatband voltage (for p-TYPE substrate).

nsubo=3.0e+23 /m3

Substrate doping level.

mnsubo=1.0

Maximum change in absolute doping, limited to 1 order of mag up.

dnsubo=0.0

Doping profile slope parameter.

vnsubo=0.0

Doping profile corner voltage parameter.

nslpo=0.1

Doping profile smoothing parameter.

npo=1.0e+27 /m3

Polysilicon doping level.

qmc=1.0

Quantum mechanical correction factor.

dlq=0.0 m

Length delta for capacitor size.

dwq=0.0 m

Width delta for capacitor size.

dwr=0.0 m

Width delta for substrate resistance calculation.

cfrl=0.0 F/m

Fringing capacitance in length direction.

cfrw=0.0 F/m

Fringing capacitance in width direction.

rshg=1.0 /sq

Gate sheet resistance.

rpv=0.0 m2

Vertical resistance down through gate in units of ohm*m^2.

rend=1.0e-04 m

End resistance (extrinsic well res. plus vertical contact res. to well) per width.

rshs=1000.0 /sq

Substrate sheet resistance.

uac=5.0e-02 m2/V/s

Accumulation layer zero bias mobility.

uacred=0.0 /V

Accumulation layer mobility degradation factor.

stvfb=0.0 V/K

Temperature dependence of VFB.

strshg=0.0

Temperature dependence of RSHG.

strpv=0.0

Temperature dependence of RPV.

strend=0.0

Temperature dependence of REND.

strshs=0.0

Temperature dependence of RSHS.

stuac=0.0

Temperature dependence of UAC.

feta=1.0

Effective field parameter.

swigate=0

Flag for gate current: 0=turn off and 1=turn on.

chibo=3.1 V

Tunneling barrier height for electrons.

chibpo=4.5 V

Tunneling barrier height for holes.

stig=2.0

Common temperature coefficient for gate currents (ECB, HVB and HVB).

lov=0.0 m

Overlap length.

novo=5.0e+25 /m3

Effective doping level of overlap regions.

iginvlw=0.0 A

ECB gate channel current pre-factor for 1 um^2 channel area.

igovw=0.0 A

ECB gate overlap current pre-factor for 1 um wide gate overlap region.

gcoo=0.0

ECB gate tunneling energy adjustment.

gc2o=0.375

ECB gate current slope factor.

gc3o=0.063

ECB gate current curvature factor.

igchvlw=0.0 A

HVB gate channel current pre-factor for 1 um^2 channel area.

igovhvw=0.0 A

HVB gate overlap current pre-factor for 1 um wide gate overlap region.

gcohvo=0.0

HVB gate tunneling energy adjustment.

gc2hvo=0.375

HVB gate current slope factor.

gc3hvo=0.063

HVB gate current curvature factor.

minr=0.001

Minimum resistor between bi and b.

igmax=1.0e-05 A

Maximum gate tunneling current.

compatible=spectre

Compatible parameters. Possible values are spectre, spice2, spice3, cdsspice, spiceplus, eldo, sspice,  and mica.

racnoise=1

Rac noise selector.

noscale=0

Enables or disables scale support.

dta=0.0 C

Temperature rise from ambient. It served as the default value of instance DTA.

trise=0.0 C

Alias of DTA.

Output Parameters

tempeff (C)

Effective temperature for a single device.

meff

Effective multiplicity factor (m-factor).

Operating-Point Parameters

v

voltage across capacitor.

i

Current through capacitor.

cap

LOw frequency capacitance.

qg

Intrinsic charge.

igc

Gate tunneling current.

igover

Gate overlap tunneling current.

Related Topics

PSP-Based MOS Varactor Model (mosvar)

Model Equations

Model Version Updates

Model Usage


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