LEVEL3 Model-LEVEL 3 MOSFET Model

LEVEL3_Model:LEVEL 3 MOSFET Model

The SPICE and Spectre Level 3 MOSFET models are translated to the ADS MOSFET LEVEL3_Model. For translation information on the MOSFET device, refer to Mxxxxxxx for SPICE or MOSFET Device for Spectre.

For more information on the ADS model, place the model in a schematic and choose Edit > Component > Edit Component Parameters to view the model parameters. You can also click Help in the component editor dialog box for additional information.

Example SPICE Command Line:

.model nch nmos level=3 vto=0 kp=2e-5 ...

Example Spectre Command Line:

model pchmos3 mos3 type=p vto=-0.83 gamma=0.4511

SPICE Dialect and Netlist Syntax:

Spice2/3:	.model mname NMOS\|PMOS LEVEL=3 [param= value]*
PSpice:	.model mname NMOS\|PMOS LEVEL=3 [param= value]*
HSpice:	.model mname NMOS\|PMOS LEVEL=3 [param= value]*
Spectre:	model mname mos3 type= [n\|p] [param= value]*

ADS Netlist Syntax:

model mname MOSFET NMOS=[0|1]PMOS=[0|1]Idsmod=3 [param= value]*

ADS Schematic Symbol:

Model Parameters:

For information on parameter format, refer to Using Parameter Mapping Tables to Understand a Translation.

LEVEL3_Model Parameters
ADS	Default	Unit	Spice2/3	PSpice	HSpice	Spectre
NMOS	yes					type ^† n (NMOS)
PMOS	no					type ^† n (NMOS)
Idsmod	3		Level=3	Level=3	Level=3	-
Capmod	1					capmod bsim
Vto	0.0	V	x	x	VT	vto 0 V
Kp	2e-5	A/V ²	x	x	BET, BETA	kp 2.0718e-5 A/V ²
Gamma	0.0	√ V	x	x	(.5276)	gamma 0
Phi	0.6	V	x	x	(.576)	phi 0.7 V
Rd	0.0	ohms	x	x	-	rd 0 Ohm
Rs	0.0	ohms	x	x	-	rs 0 Ohm
Cbd	0.0	F	x	x	-	cbd 0 F
Cbs	0.0	F	x	x	-	cbs 0 F
Is	1e-14	A	x	x	-	is 1e-14 A
Pb	0.8	V	x	x	-	pb 0.8 V
Cgso	0.0	F/m	x	x	-	cgso 0 F/m
Cgdo	0.0	F/m	x	x	-	cgdo 0 F/m
Cgbo	0.0	F/m	x	x	-	cgbo 0 F/m
Rsh	0.0	ohms/sq	x	x	-	rsh 0 Ohm/sqr
Cj	0.0	F/m ²	x	x	-	cj 0 F/m ²
Mj	0.5		x	x	-	mj 1/2
Cjsw	0.0	F/m	x	x	-	cjsw 0 F/m
Mjsw	0.33		x	x	-	mjsw 1/3
Js	0.0	A/m ²	x	x	-	js (A/m ² )
Tox	1e-7	m	x	x	x	tox 1e-7 m
Nsub			x	x	DNB, NB (1e15)	nsub 1.13e16 cm ^-3
Nss	0.0	1/cm ²	x	x	-	nss 0 cm ^-2
Nfs	0.0	1/cm ²	x	x	DFS, NF, DNF	nfs 0 cm ^-2
Tpg	1		x	x	-	tpg 1.0
Xj	0.0	m	x	x	x	xj 0 m
Ld	0.0	m	x	x	DLAT, LATD	ld 0 m
Uo	600.0	cm ² /(V×s)	x	x	UB, UBO \(PMOS def=250)	uo 600 cm ^2/Vs
Vmax	0.0	m/s	x	x	VMX	vmax infinity m/s
Xqc	1.0		-	x	-	xqc 0
Nlev						-
Gdsnoi	1					-
Kf	0.0		x	x	-	kf 0
Af	1.0		x	x	-	af 1
Fc	0.5		x	x	-	fc 0.5
Delta	0.0		x	x	x	delta 0
Theta	0.0	1/V	x	x	x	theta 0 1/V
Eta	0.0		x	x	x	eta 0 1/V
Kappa	0.2		x	x	x	kappa 0.2
Rg	0.0	ohms	-	x	-	-
Rds	infinity	ohms	-	x	-	-
Tnom						tnom \(C)
Trise						trise 0 C
N	1.0		-	x	-	n 1
Tt	0.0	sec	-	x	-	-
Ffe						-
Imax						imax 1 A
wVsubfwd						-
wBvsub						-
wBvg						-
wBvds						-
wIdsmax						-
wPmax						-
Acm						-
Hdif						hdif 0 m
Ldif						ldif 0 m
Wmlt
Xw						xw 0 m
Rdc						rdc 0 Ohm
Rsc						rsc 0 Ohm
^† If type = nmos then NMOS = yes and PMOS = no; if type = pmos then NMOS = no and PMOS = yes ^†† Temp = trise + temp ("temp" is an ADS global variable)

Comments:

ADS does not support NRD, RDC, NRS or RSC MOSFET parameters. If RD or RS are not given, they will be calculated as follows:
RD=NRD*RSH+RDC
RS=NRS*RSH+RSC
The simulation results using the ADS MOSFET LEVEL3_Model match the Spice3 model (UC Berkeley Spice 3F5) but not the Spectre or Hspice model.