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Corrected the extraction of length and width of devices that are

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(truly) missing a terminal (such as a MOSCAP made with a gate
extending into but not crossing a diffusion region).  Added the
most requested GUI feature, which is a vertical scrollbar on the
parameterized device window (could be improved by maximizing
window height without exceeding display height).
This commit is contained in:
Tim Edwards
2023-03-12 16:57:47 -04:00
parent e10901e32b
commit 913c830dee
3 changed files with 111 additions and 65 deletions
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extract/ExtBasic.c
+29 -3
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@@ -2099,7 +2099,7 @@ extOutputDevices(def, transList, outFile)
case DEV_SUBCKT:
case DEV_MSUBCKT:
case DEV_ASYMMETRIC:
length = extTransRec.tr_gatelen / 2; /* (default) */
length = 0;
width = 0;
isAnnular = FALSE;
@@ -2119,7 +2119,32 @@ extOutputDevices(def, transList, outFile)
extTransRec.tr_termvector[n].p_y == 0)
isAnnular = TRUE;
}
if (n) width /= n;
/* For devices missing a terminal, reduce n accordingly. */
/* This avoids errors in length and width calculations. */
while ((n > 0) && (extTransRec.tr_termnode[n - 1]) &&
(extTransRec.tr_termlen[n - 1] == 0) &&
(extTransRec.tr_termarea[n - 1] == 0) &&
(extTransRec.tr_termperim[n - 1] == 0)) n--;
if (n)
{
width /= n;
if (n > 1)
length = extTransRec.tr_gatelen / n;
else
{
/* Assumption: A device with a single terminal */
/* must be rectangular; an example is a MOSCAP */
/* with poly over three sides of diffusion. */
/* Length in this case is not properly defined, */
/* but it is only necessary for the model to */
/* get the correct area per W * L. If the */
/* device is annular, then this assumption will */
/* get corrected by extComputeEffectiveLW(). */
length = (extTransRec.tr_gatelen - width) / 2;
}
}
/*------------------------------------------------------*/
/* Note that the tr_termvector says a lot about the */
@@ -3152,7 +3177,8 @@ extTransPerimFunc(bp)
*/
if (strcmp(extTransRec.tr_devrec->exts_deviceName, "Ignore") &&
strcmp(extTransRec.tr_devrec->exts_deviceName, "Short"))
TxError("Error: Asymmetric device with multiple terminals!\n");
TxError("Warning: Unexpected asymmetric device at %d, %d!\n",
bp->b_outside->ti_ll.p_x, bp->b_outside->ti_ll.p_y);
break;
}