* Generated with LTspice2Qspice_Netlist.m (by KSKelvin)
* ANSI Encoding | Created 20-Nov-2025 (251120)
* Convert LTspice subcircuit into Qspice subcircuit
*
.subckt LT1677 1 2 3 4 5
*A1 2 1 0 0 0 0 0 0 OTA g=0 in=276f ink=178
XA1 2 1 0 0 0 0 0 0 LTspiceOTA-NC-A1 g=0 in=276f ink=178
* Qspice version of A-device OTA : no output connection
.subckt LTspiceOTA-NC-A1 N1 N2 N3 N4 N5 N6 N7 N8
Ã1 Vdd Vss O N1 N2 ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ MultGmAmp Gm=Gm EN=en ENK=enk IN=incm INK=incmk
V1 Vdd 0 0
V2 Vss 0 0
.param g=1 en=0 enk=0 incm=0 incmk=0
.param Gm=max(1p,g) ; cannot accept Gm=0
.ends LTspiceOTA-NC-A1
B1 0 N004 I=10u*dnlim(uplim(V(1),V(3)+.2,.1), V(4)-.2, .1)+1n*V(1)-17.2p
B2 N004 0 I=10u*dnlim(uplim(V(2),V(3)+.21,.1), V(4)-.21, .1)+1n*V(2)
C9 3 2 2.1p Rpar=4G noiseless
C10 N004 0 5f Rpar=100K noiseless
D4 N009 4 DBIA2
M1 5 VN 4 4 NI temp=27
C2 3 5 1p Rpar=1g noiseless
D5 VN 4 DLIMN1
M2 5 VP 3 3 PI temp=27
D8 3 VP DLIMP
C3 3 VP 4p Rser=1Meg noiseless
*A3 N007 N008 4 4 4 4 VP 4 OTA g=800n ref=-.02 linear vlow=-1e308 vhigh=1e308
XA3 N007 N008 4 4 4 4 VP 4 LTspiceOTA-SymVddVss-A3 g=800n ref=-.02 vlow=-1e9 vhigh=1e9
* Qspice version of A-device OTA : Symmetric Vdd/Vss without Current Limit (keyword : linear)
.subckt LTspiceOTA-SymVddVss-A3 N1 N2 N3 N4 N5 N6 N7 N8
Ã1 Vdd Vss O1 N1 N2 ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ MultGmAmp Gm=Gm VOS1=ref EN=en ENK=enk IN=incm INK=incmk Rout=Rout Capvdd=Cout/2 Capvss=Cout/2 Vdsat=1p
×1 «O1 0 N7 N6» Turns=1 1
V1 Vdd 0 Vdd
V2 Vss 0 Vss
.param g=1 Vhigh=2 Vlow=0 Iout=10µ Isink=Iout ref=0 en=0 enk=0 incm=0 incmk=0 Rout=1/1e-12 Cout=0
.param Gm=max(1p,g) ; cannot accept Gm=0
.param Vdd=min(Vhigh,1e9) ; cannot accept -1e308 or 1e308
.param Vss=max(Vlow,-1e9) ; cannot accept -1e308 or 1e308
.ends LTspiceOTA-SymVddVss-A3
C11 5 4 1p Rpar=1g noiseless
C12 VN 4 10f Rser=250k noiseless
*D10 N009 1 DBIA1
XD10 N009 1 DBIA1
*D6 VN 4 DLIMN2
XD6 VN 4 DLIMN2
*A4 0 N004 0 0 0 0 N005 0 OTA g=10u linear en=3.2n enk=25 Vhigh=1e308 Vlow=-1e308
XA4 0 N004 0 0 0 0 N005 0 LTspiceOTA-SymVddVss-A4 g=10u en=3.2n enk=25 Vhigh=1e9 Vlow=-1e9
* Qspice version of A-device OTA : Symmetric Vdd/Vss without Current Limit (keyword : linear)
.subckt LTspiceOTA-SymVddVss-A4 N1 N2 N3 N4 N5 N6 N7 N8
Ã1 Vdd Vss O1 N1 N2 ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ MultGmAmp Gm=Gm VOS1=ref EN=en ENK=enk IN=incm INK=incmk Rout=Rout Capvdd=Cout/2 Capvss=Cout/2 Vdsat=1p
×1 «O1 0 N7 N6» Turns=1 1
V1 Vdd 0 Vdd
V2 Vss 0 Vss
.param g=1 Vhigh=2 Vlow=0 Iout=10µ Isink=Iout ref=0 en=0 enk=0 incm=0 incmk=0 Rout=1/1e-12 Cout=0
.param Gm=max(1p,g) ; cannot accept Gm=0
.param Vdd=min(Vhigh,1e9) ; cannot accept -1e308 or 1e308
.param Vss=max(Vlow,-1e9) ; cannot accept -1e308 or 1e308
.ends LTspiceOTA-SymVddVss-A4
C16 N008 5 60p Rser=500 noiseless
*A5 N006 0 N007 N007 N007 N007 N008 N007 OTA g=2.64m iout=151u Vhigh=1e308 Vlow=-1e308
XA5 N006 0 N007 N007 N007 N007 N008 N007 LTspiceOTA-SymVddVss-A5 g=2.64m iout=151u Vhigh=1e9 Vlow=-1e9
* Qspice version of A-device OTA : Symmetric Vdd/Vss with Current Limit
.subckt LTspiceOTA-SymVddVss-A5 N1 N2 N3 N4 N5 N6 N7 N8
Ã1 Vdd Vss O1 N1 N2 ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ MultGmAmp Gm=Gm Iout=Iout Isnk=abs(Isink) VOS1=ref EN=en ENK=enk IN=incm INK=incmk Rout=Rout Capvdd=Cout/2 Capvss=Cout/2 Vdsat=1p
×1 «O1 0 N7 N6» Turns=1 1
V1 Vdd 0 Vdd
V2 Vss 0 Vss
.param g=1 Vhigh=2 Vlow=0 Iout=10µ Isink=Iout ref=0 en=0 enk=0 incm=0 incmk=0 Rout=1/1e-12 Cout=0
.param Gm=max(1p,g) ; cannot accept Gm=0
.param Vdd=min(Vhigh,1e9) ; cannot accept -1e308 or 1e308
.param Vss=max(Vlow,-1e9) ; cannot accept -1e308 or 1e308
.ends LTspiceOTA-SymVddVss-A5
*D12 1 3 DBIAOT
XD12 1 3 DBIAOT
*D13 2 3 DBIAOT
XD13 2 3 DBIAOT
G1 4 VN N008 N007 30n
C5 3 N009 20p Rpar=1Meg noiseless
C14 VP 5 50f
B3 VP 4 I=25n*V(VP,5)/dnlim(V(3,4),2,.1)
C7 3 1 2.1p Rpar=4G noiseless
C13 3 4 1000p
C15 VP VN 200f Rser=250k noiseless
*D7 3 4 DP
XD7 3 4 DP
D15 1 2 DINP
C6 1 4 2.1p Rpar=4G noiseless
C8 2 4 2.1p Rpar=4G noiseless
*S2 0 N005 5 3 LIMU
XS2 0 N005 5 3 LIMU
*S3 N005 0 4 5 LIMD
XS3 N005 0 4 5 LIMD
D1 N008 N007 DLIM
*D9 N009 2 DBIA1
XD9 N009 2 DBIA1
L2 N005 0 11.41m Cpar=4.5f Rser=143k Rpar=498k noiseless
*C1 N006 0 375p Rpar=1k Rser=212 noiseless ; Qspice: Subckt to replace LTspice C with Lser / Rpar
C1 N006 0 375p Rpar=1k Rser=212 noiseless
G2 0 N006 N005 0 1m
G3 0 N007 4 0 50m
G4 0 N007 3 0 50m
C4 N007 0 80p Rpar=10
*.model DP D(Roff=1T Ron=1k Vfwd=0.5 ilimit=1.085m noiseless) ; Qspice: Subckt to replace LTspice diode with Ilimit
.subckt DP A K ilimit=1.085m Ron=1k
D1 A N001 Dq
I1 N001 K Ilimit Vsat=2*Ilimit*(Ron-1m)
.model Dq D Ron=1m Roff=1T Vfwd=0.5 noiseless
.ends DP
*.model DBIA1 D(Ron=1k Roff=100G Vfwd=.1 ilimit=390n epsilon=.1 noiseless) ; Qspice: Subckt to replace LTspice diode with Ilimit
.subckt DBIA1 A K ilimit=390n Ron=1k
D1 A N001 Dq
I1 N001 K Ilimit Vsat=2*Ilimit*(Ron-1m)
.model Dq D Ron=1m Roff=100G Vfwd=.1 epsilon=.1 noiseless
.ends DBIA1
.model DBIA2 D(Ron=1k Roff=10G Vfwd=1.3 epsilon=.1 noiseless)
*.model DBIAOT D(Ron=10k Vfwd=-.7 ilimit=193n epsilon=50m noiseless) ; Qspice: Subckt to replace LTspice diode with Ilimit
.subckt DBIAOT A K ilimit=193n Ron=10k
D1 A N001 Dq
I1 N001 K Ilimit Vsat=2*Ilimit*(Ron-1m)
.model Dq D Ron=1m Vfwd=-.7 epsilon=50m noiseless
.ends DBIAOT
.model DINP D(Ron=100 Roff=10G Vfwd=1.4 Vrev=1.4 epsilon=100m revepsilon=100m noiseless)
*.model LIMU SW(level=2 Ron=1 Roff=2Meg vt=-100m vh=-10m oneway noiseless) ; Qspice: Subckt to replace LTspice switch with Ilimit / Vser
.subckt LIMU + - +C -C Vser=0
S1 + N001 +C -C SWq
VS1 N002 N001 Vser
DS1 - N002 Di
.model Di D Ron=1m Roff=100Meg Vfwd=0
.model SWq SW level=2 Ron=1 Roff=2Meg vt=-100m vh=-10m noiseless
.ends LIMU
*.model LIMD SW(level=2 Ron=1 Roff=2Meg vt=-60m vh=-10m oneway noiseless) ; Qspice: Subckt to replace LTspice switch with Ilimit / Vser
.subckt LIMD + - +C -C Vser=0
S1 + N001 +C -C SWq
VS1 N002 N001 Vser
DS1 - N002 Di
.model Di D Ron=1m Roff=100Meg Vfwd=0
.model SWq SW level=2 Ron=1 Roff=2Meg vt=-60m vh=-10m noiseless
.ends LIMD
.model NI VDMOS(Vto=300m kp=30m lambda=.01 rs=5)
.model DLIMN1 D(Ron=100k Roff=3g Vfwd=2.1 Vrev=-330m epsilon=.1 noiseless)
*.model DLIMN2 D(Ron=500k Roff=1G Vfwd=1 epsilon=1.2 ilimit=200n noiseless) ; Qspice: Subckt to replace LTspice diode with Ilimit
.subckt DLIMN2 A K ilimit=200n Ron=500k
D1 A N001 Dq
I1 N001 K Ilimit Vsat=2*Ilimit*(Ron-1m)
.model Dq D Ron=1m Roff=1G Vfwd=1 epsilon=1.2 noiseless
.ends DLIMN2
.model PI VDMOS(Vto=-300m Kp=30m lambda=.01 pchan is=0 rs=2)
.model DLIMP D(Ron=100k Roff=100Meg Vfwd=1.6 Vrev=-.3 epsilon=10m revepsilon=10m noiseless)
.model DLIM D(Ron=100 Roff=7Meg Vfwd=2.3 Vrev=1 epsilon=10m revepsilon=10m noiseless)
.ends LT1677