eldo_user

Eldo Control Language
Library of Functions for Tasks
endif
endwhile
if (iter >= 50)
fprint(stdout, "Failed to find vth in less than 50 iterations.\n")
return -1
else
fprint(stdout, "\n\tvth=%.2eV\n", vth)
endif
/**
* Compute ids_sat by dichotomy for many values of vgs > vth.
*/
step (type=log, param=vgs, start = vth + 0.01, stop=10, dec=20)
i++
vgs_res[i] = vgs
/* Check bounds. */
vds_min = 0
vds_max = 5
simulation(mos(vgs_val = vgs, vds_val = vds_min), m1_mode = @m1_mode,
m1_ids =
@m1_ids)
if (m1_mode != "linear")
fprint(stdout, "Failed to find ids_sat for vgs=%eV because with vds=%eV,
opmode(m1)=%s\n", vgs, vds_min, m1_mode)
return -1
endif
simulation(mos(vgs_val = vgs, vds_val = vds_max), m1_mode = @m1_mode,
m1_ids =
@m1_ids)
if (m1_mode != "saturation")
fprint(stdout, "Failed to find ids_sat for vgs=%eV because with vds=%eV,
opmode(m1)=%s\n", vgs, vds_max, m1_mode)
return -1
endif
/* Dichotomy. */
iter = 0
while (abs(vds_max - vds_min) > 0.001 && iter < 50)
iter++
vds = vds_min + (abs(vds_max - vds_min) / 2)
simulation(mos(vgs_val = vgs, vds_val = vds), m1_mode = @m1_mode, m1_ids
=
@m1_ids)
if (m1_mode == "linear")
vds_min = vds
else
vds_max = vds
endif
endwhile
if (iter >= 50)
fprint(stdout, "Failed to find ids_sat in less than 50 iterations for
vgs=%eV.\n", vgs)
return -1
else
vds_sat_res[i] = vds
ids_sat_res[i] = m1_ids
992
Eldo® User's Manual, 15.3