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Replace B source pwl by XSPICE PWL Controlled Source 

that has smooth rounded and differentiable corners.
This is used in the replacem,ent operation evaluating
Exxx n1 n2 TABLE {expression} = (x0, y0) (x1, y1) (x2, y2)
This commit is contained in:
Holger Vogt 2019-11-09 23:10:28 +01:00
parent b76fbf99fe
commit ee5f4cfc29
1 changed files with 66 additions and 73 deletions
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139
src/frontend/inpcom.c
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@ -4526,16 +4526,21 @@ static char *search_plain_identifier(char *str, const char *identifier)
/* ps compatibility:
ECOMP 3 0 TABLE {V(1,2)} = (-1 0V) (1, 10V)
Exxx n1 n2 TABLE {0.45*v(1)} = (-1, -0.5) (-0.5, 0) (0, 2) (0.5, 2) (1, 1)
-->
ECOMP 3 0 int3 int0 1
BECOMP int3 int0 V = pwl(V(1,2), -2, 0, -1, 0 , 1, 10V, 2, 10V)
exxx n1 n2 exxx_int1 0 1
bexxx exxx_int2 0 v= 4.5000000000e-01 * v(1)
aexxx %v(exxx_int2) %v(exxx_int1) xfer_exxx
.model xfer_exxx pwl(x_array=[-1 -0.5 0 0.5 1 ] y_array=[-0.5 0 2 2 1 ]
input_domain=0.1 fraction=TRUE)
GD16 16 1 TABLE {V(16,1)} ((-100V,-1pV)(0,0)(1m,1u)(2m,1m))
-->
GD16 16 1 int_16 int_1 1
BGD16 int_16 int_1 V = pwl (v(16,1) , -100V , -1pV , 0 , 0 , 1m , 1u , 2m ,
1m)
gd16 16 1 table {v(16,1)} ((-100,-100e-15)(0,0)(1m,1u)(2m,1m))
-->
gd16 16 1 gd16_int1 0 1
bgd16 gd16_int2 0 v= v(16,1)
agd16 %v(gd16_int2) %v(gd16_int1) xfer_gd16
.model xfer_gd16 pwl(x_array=[-100 0 1m 2m ] y_array=[-100e-15 0 1u 1m ]
input_domain=0.1 fraction=TRUE)
*/
/* hs compatibility:
@ -4629,15 +4634,16 @@ static void inp_compat(struct card *card)
}
/* Exxx n1 n2 TABLE {expression} = (x0, y0) (x1, y1) (x2, y2)
-->
Exxx n1 n2 int1 0 1
BExxx int1 0 V = pwl (expression, x0-(x2-x0)/2, y0, x0, y0, x1,
y1, x2, y2, x2+(x2-x0)/2, y2)
Exxx n1 n2 Exxx_int1 0 1
BExxx Exxx_int2 0 v = expression
aExxx %v(Exxx_int2) %v(Exxx_int1) xfer_Exxx
.model xfer_Exxx pwl(x_array=[x0 x1 x2]
y_array=[y0 y1 y2]
input_domain=0.1 fraction=TRUE)
*/
if ((str_ptr = strstr(curr_line, "table")) != NULL) {
char *expression, *firstno, *ffirstno, *secondno, *midline,
*lastno, *lastlastno;
double fnumber, lnumber, delta;
int nerror;
char *expression, *firstno, *secondno;
char xar[1024], yar[1024];
cut_line = curr_line;
/* title and nodes */
title_tok = gettok(&cut_line);
@ -4678,70 +4684,57 @@ static void inp_compat(struct card *card)
*str_ptr = ' ';
if ((str_ptr = strchr(cut_line, '}')) != NULL)
*str_ptr = ' ';
/* get first two numbers to establish extrapolation */
str_ptr = cut_line;
ffirstno = gettok_node(&cut_line);
if (!ffirstno) {
fprintf(stderr,
"Error: bad syntax in line %d\n %s\n",
card->linenum_orig, card->line);
controlled_exit(EXIT_BAD);
}
firstno = copy(ffirstno);
fnumber = INPevaluate(&ffirstno, &nerror, TRUE);
secondno = gettok_node(&cut_line);
midline = cut_line;
cut_line = strrchr(str_ptr, '(');
if (!cut_line) {
fprintf(stderr,
"Error: bad syntax in line %d (missing "
"parentheses)\n %s\n",
card->linenum_orig, card->line);
controlled_exit(EXIT_BAD);
}
/* replace '(' with ',' and ')' with ' ' */
for (; *str_ptr; str_ptr++)
if (*str_ptr == '(')
*str_ptr = ',';
else if (*str_ptr == ')')
*str_ptr = ' ';
/* scan for last two numbers */
lastno = gettok_node(&cut_line);
lnumber = INPevaluate(&lastno, &nerror, FALSE);
/* check for max-min and take half the difference for
* delta */
delta = (lnumber - fnumber) / 2.;
lastlastno = gettok_node(&cut_line);
if (!secondno || (*midline == '\0') || (delta <= 0.) ||
!lastlastno) {
fprintf(stderr,
"Error: bad syntax in line %d\n %s\n",
card->linenum_orig, card->line);
controlled_exit(EXIT_BAD);
}
ckt_array[1] = tprintf("b%s %s_int1 0 v = pwl(%s, %e, "
"%s, %s, %s, %s, %e, %s)",
title_tok, title_tok, expression, fnumber - delta,
secondno, firstno, secondno, midline,
lnumber + delta, lastlastno);
/* E51 50 51 E51_int1 0 1
BE51 e51_int2 0 v = V(40,41)
ae51 %v(e51_int2) %v(e51_int1) xfer_e51
.model xfer_e51 pwl(x_array=[-10 0 1m 2m 3m]
+ y_array=[-1n 0 1m 1 100]
+ input_domain=0.1 fraction=TRUE)
*/
ckt_array[1] = tprintf("b%s %s_int2 0 v = %s", title_tok,
title_tok, expression);
ckt_array[2] = tprintf(
"a%s %%v(%s_int2) %%v(%s_int1) xfer_%s",
title_tok, title_tok, title_tok, title_tok);
/* (x0, y0) (x1, y1) (x2, y2) to x0 x1 x2, y0 y1 y2 */
xar[0] = '\0';
yar[0] = '\0';
while (*cut_line != '\0') {
firstno = gettok_node(&cut_line);
secondno = gettok_node(&cut_line);
if ((!firstno && secondno) ||
(firstno && !secondno)) {
fprintf(stderr, "Error: Missing token in %s\n",
curr_line);
break;
}
else if (!firstno && !secondno)
continue;
strcat(xar, firstno);
strcat(xar, " ");
strcat(yar, secondno);
strcat(yar, " ");
tfree(firstno);
tfree(secondno);
}
ckt_array[3] = tprintf(
".model xfer_%s pwl(x_array=[%s] y_array=[%s] "
"input_domain=0.1 fraction=TRUE)",
title_tok, xar, yar);
// comment out current variable e line
*(card->line) = '*';
// insert new B source line immediately after current line
for (i = 0; i < 2; i++)
// insert new lines immediately after current line
for (i = 0; i < 4; i++)
card = insert_new_line(card, ckt_array[i], 0, 0);
tfree(firstno);
tfree(lastlastno);
tfree(expression);
tfree(title_tok);
tfree(node1);
tfree(node2);
}
else {
/* not used */
tfree(ckt_array[0]);
}
tfree(title_tok);
tfree(node1);
tfree(node2);
}
}
/* Exxx n1 n2 VOL = {equation}
-->
Exxx n1 n2 int1 0 1