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mos1...3: set channel thermal noise to 0 in subthreshold range for nlev=3

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dwarning 2024-05-15 14:30:16 +02:00 committed by Holger Vogt
parent f44a0ede08
commit 02a5cd5ea6
3 changed files with 18 additions and 15 deletions
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11
src/spicelib/devices/mos1/mos1noi.c
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@ -128,12 +128,13 @@ MOS1noise(int mode, int operation, GENmodel * genmodel, CKTcircuit * ckt,
/* linear region */ /* linear region */
alpha = 1.0 - (vds*inst->MOS1mode/(model->MOS1type*inst->MOS1vdsat)); alpha = 1.0 - (vds*inst->MOS1mode/(model->MOS1type*inst->MOS1vdsat));
} }
} else { beta = inst->MOS1tTransconductance * inst->MOS1m *
alpha = 0.0;
}
beta = inst->MOS1tTransconductance * inst->MOS1m *
inst->MOS1w/(inst->MOS1l - 2 * model->MOS1latDiff); inst->MOS1w/(inst->MOS1l - 2 * model->MOS1latDiff);
Sid = 2.0 / 3.0 * beta * vgst * (1.0+alpha+alpha*alpha) / (1.0+alpha) * model->MOS1gdsnoi; Sid = 2.0 / 3.0 * beta * vgst * (1.0+alpha+alpha*alpha) / (1.0+alpha) * model->MOS1gdsnoi;
} else {
/* subthreshold region */
Sid = 0.0;
}
} }
NevalSrcInstanceTemp( & noizDens[MOS1IDNOIZ], & lnNdens[MOS1IDNOIZ], NevalSrcInstanceTemp( & noizDens[MOS1IDNOIZ], & lnNdens[MOS1IDNOIZ],

11
src/spicelib/devices/mos2/mos2noi.c
View File

@ -117,12 +117,13 @@ MOS2noise(int mode, int operation, GENmodel * genmodel, CKTcircuit * ckt,
/* linear region */ /* linear region */
alpha = 1.0 - (vds*inst->MOS2mode/(model->MOS2type*inst->MOS2vdsat)); alpha = 1.0 - (vds*inst->MOS2mode/(model->MOS2type*inst->MOS2vdsat));
} }
} else { beta = inst->MOS2tTransconductance * inst->MOS2m *
alpha = 0.0;
}
beta = inst->MOS2tTransconductance * inst->MOS2m *
inst->MOS2w/(inst->MOS2l - 2 * model->MOS2latDiff); inst->MOS2w/(inst->MOS2l - 2 * model->MOS2latDiff);
Sid = 2.0 / 3.0 * beta * vgst * (1.0+alpha+alpha*alpha) / (1.0+alpha) * model->MOS2gdsnoi; Sid = 2.0 / 3.0 * beta * vgst * (1.0+alpha+alpha*alpha) / (1.0+alpha) * model->MOS2gdsnoi;
} else {
/* subthreshold region */
Sid = 0.0;
}
} }
NevalSrcInstanceTemp( & noizDens[MOS2IDNOIZ], & lnNdens[MOS2IDNOIZ], NevalSrcInstanceTemp( & noizDens[MOS2IDNOIZ], & lnNdens[MOS2IDNOIZ],

11
src/spicelib/devices/mos3/mos3noi.c
View File

@ -117,12 +117,13 @@ MOS3noise(int mode, int operation, GENmodel * genmodel, CKTcircuit * ckt,
/* linear region */ /* linear region */
alpha = 1.0 - (vds*inst->MOS3mode/(model->MOS3type*inst->MOS3vdsat)); alpha = 1.0 - (vds*inst->MOS3mode/(model->MOS3type*inst->MOS3vdsat));
} }
} else { beta = inst->MOS3tTransconductance * inst->MOS3m *
alpha = 0.0;
}
beta = inst->MOS3tTransconductance * inst->MOS3m *
inst->MOS3w/(inst->MOS3l - 2 * model->MOS3latDiff); inst->MOS3w/(inst->MOS3l - 2 * model->MOS3latDiff);
Sid = 2.0 / 3.0 * beta * vgst * (1.0+alpha+alpha*alpha) / (1.0+alpha) * model->MOS3gdsnoi; Sid = 2.0 / 3.0 * beta * vgst * (1.0+alpha+alpha*alpha) / (1.0+alpha) * model->MOS3gdsnoi;
} else {
/* subthreshold region */
Sid = 0.0;
}
} }
NevalSrcInstanceTemp( & noizDens[MOS3IDNOIZ], & lnNdens[MOS3IDNOIZ], NevalSrcInstanceTemp( & noizDens[MOS3IDNOIZ], & lnNdens[MOS3IDNOIZ],