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Amplificateur du Haut Parleur de l'Aigu ( TW26K2F de Davis Acoustics )

Influence importante de la température T°C sur le générateur de courant du TIP142

variation du générateur de courrant du TIP142 avec absence de charge

Macro Modèle SPICE du TIP142 (MicroCap v7.x) et IRF540 (B2 Spice AD v4.x) utilisés pour les simulations

.SUBCKT TIP142-MICROCAP 1 2 3
Q1 1 2 4 Q1model
Q2 1 4 3 Q2model 5.888
D1 3 1 Dmodel
R1 2 4 8.000E3
R2 4 3 120
.MODEL Dmodel D
+ T_ABS={temp_abs}
+ IS=4.721E-12 RS=1.083E-6 N=1.068
+ CJO=4.822E-10 VJ=0.5 M=0.34
+ FC=0.5
.MODEL Q1model NPN
+ T_ABS={temp_abs}
+ IS=8.075E-14 BF=7.827E3 NF=1
+ VAF=100 IKF=1.094 ISE=4.463E-13
+ NE=1.297 BR=0.1001 NR=1
+ VAR=100 IKR=0.4891 ISC=2.302E-13
+ NC=3.197 RB=2.222 NK=0.5471
+ RE=0.001 RC=0.990 EG=1.110
+ CJE=4.389E-10 VJE=0.77 MJE=0.3101
+ CJC=4.852E-10 VJC=0.4855 MJC=0.3379
+ XCJC=0.469 FC=0.5
.MODEL Q2model NPN
+ T_ABS={temp_abs}
+ IS=8.075E-14 BF=7.827E3 NF=1
+ VAF=100 IKF=1.094 ISE=4.463E-13
+ NE=1.297 BR=0.1001 NR=1
+ VAR=100 IKR=0.4891 ISC=2.302E-13
+ NC=3.197 RB=2.222 NK=0.5471
+ RE=0.001 RC=0.990 EG=1.110
+ CJE=4.389E-10 VJE=0.77 MJE=0.3101
+ CJC=4.852E-10 VJC=0.4855 MJC=0.3379
+ XCJC=0.469 FC=0.5
.ENDS TIP142-MICROCAP

.subckt IRF540-B2SPICE 1 2 3
**************************************
* model generated by modpex *
*copyright(c) symmetry design systems*
* all rights reserved *
* unpublished licensed software *
* contains proprietary information *
* which is the property of *
* symmetry or its licensors *
*commercial use or resale restricted *
* by symmetry license agreement *
**************************************
* model generated on apr 24, 96
* model format: spice3
* symmetry power mos model (version 1.0)
* external node designations
* node 1 -> drain
* node 2 -> gate
* node 3 -> source
m1 9 7 8 8 mm l=100u w=100u
* default values used in mm:
* the voltage-dependent capacitances are
* not included. other default values are:
* rs=0 rd=0 ld=0 cbd=0 cbs=0 cgbo=0
.model mm nmos level=1 is=1e-32 vto=3.56362 lambda=0.00291031
+ kp=25.0081 cgso=1.60584e-05 cgdo=4.25919e-07
+ T_ABS={temp_abs}
rs 8 3 0.0317085
d1 3 1 md
.model md d is=1.02194e-10 rs=0.00968022 n=1.21527 bv=100 +ibv=0.00025 eg=1.2 xti=3.03885 tt=0.0001 cjo=1.81859e-09 vj=1.1279 +m=0.449161 fc=0.5
+ T_ABS={temp_abs}
rds 3 1 4e+06
rd 9 1 0.0135649
rg 2 7 5.11362
d2 4 5 md1
* default values used in md1:
* rs=0 eg=1.11 xti=3.0 tt=0
* bv=infinite ibv=1ma
.model md1 d is=1e-32 n=50 cjo=2.49697e-09 vj=0.5 m=0.9 fc=1e-08
+ T_ABS={temp_abs}
d3 0 5 md2
* default values used in md2:
* eg=1.11 xti=3.0 tt=0 cjo=0
* bv=infinite ibv=1ma
.model md2 d is=1e-10 n=0.4 rs=3e-06
+ T_ABS={temp_abs}
rl 5 10 1
fi2 7 9 vfi2 -1
vfi2 4 0 0
ev16 10 0 9 7 1
cap 11 10 2.49697e-09
fi1 7 9 vfi1 -1
vfi1 11 6 0
rcap 6 10 1
d4 0 6 md3
* default values used in md3:
* eg=1.11 xti=3.0 tt=0 cjo=0
* rs=0 bv=infinite ibv=1ma
.model md3 d is=1e-10 n=0.4
+ T_ABS={temp_abs}
.ends IRF540-B2SPICE

Réponse à un echelon de tension pour diverses valeurs de la résistance de gate de l'IRF540 (50, 100 220 470 1k)

R_Gate_IRF540=1kOms

20xLOG(3,39/0,175)=25,74dB

25,74dB - 20xLOG(2,3/0,175)=3,36dB