<s>
CoolSPICE	B-Algorithm
is	O
a	O
computer	O
aided	O
design	O
tool	O
for	O
electronic	O
circuit	O
development	O
.	O
</s>
<s>
It	O
is	O
a	O
version	O
of	O
the	O
SPICE	B-Protocol
(	O
Simulation	O
Program	O
with	O
Integrated	O
Circuit	O
Emphasis	O
)	O
simulation	O
tool	O
with	O
focuses	O
on	O
design	O
and	O
simulation	O
for	O
circuit	O
operation	O
at	O
cryogenic	O
temperatures	O
,	O
circuits	O
operating	O
with	O
Wide-bandgap	O
semiconductors	O
,	O
and	O
simulation	O
of	O
thermal	O
effects	O
on	O
circuit	O
performance	O
.	O
</s>
<s>
The	O
circuit	B-Language
simulation	I-Language
tool	O
was	O
developed	O
from	O
SPICE3f5	O
,	O
a	O
version	O
of	O
Ngspice	B-Algorithm
,	O
by	O
CoolCAD	O
Electronics	O
,	O
LLC	O
.	O
</s>
<s>
The	O
software	O
is	O
used	O
for	O
modelling	O
both	O
cryogenic-temperature	O
CMOS	B-Device
circuits	O
and	O
high-power	O
,	O
high-temperature	O
Silicon	O
carbide	O
(	O
SiC	O
)	O
-power	O
Metal	B-Architecture
Oxide	I-Architecture
Semiconductor	I-Architecture
Field	I-Architecture
Effect	I-Architecture
Transistor	I-Architecture
(	O
MOSFET	B-Architecture
)	O
devices	O
.	O
</s>
<s>
A	O
freeware	O
version	O
of	O
CoolSPICE	B-Algorithm
is	O
available	O
for	O
download	O
on	O
the	O
web	O
.	O
</s>
<s>
CoolSPICE	B-Algorithm
simulates	O
electronic	O
circuits	O
operating	O
at	O
cryogenic	O
temperatures	O
ranging	O
as	O
low	O
as	O
4K	O
which	O
is	O
the	O
temperature	O
of	O
liquid	O
Helium	O
(	O
He	O
)	O
.	O
</s>
<s>
The	O
compact	O
models	O
used	O
to	O
carry	O
out	O
these	O
circuit	B-Language
simulations	I-Language
were	O
created	O
for	O
numerous	O
CMOS	B-Device
processes	O
;	O
models	O
were	O
built	O
on	O
BSIM	B-Algorithm
4	O
and	O
experimentally	O
verified	O
.	O
</s>
<s>
BSIM	B-Algorithm
4	O
is	O
a	O
predictive	O
MOSFET	B-Architecture
SPICE	B-Protocol
model	O
for	O
circuit	B-Language
simulation	I-Language
and	O
CMOS	B-Device
development	O
created	O
by	O
the	O
BSIM	B-Algorithm
Research	O
Group	O
in	O
the	O
Department	O
of	O
Electrical	O
Engineering	O
and	O
Computer	O
Sciences	O
at	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
.	O
</s>
<s>
CoolSPICE	B-Algorithm
also	O
has	O
device	O
models	O
for	O
cryogenic	O
temperature	O
operation	O
simulation	O
of	O
NMOS	O
and	O
PMOS	O
from	O
different	O
technologies	O
.	O
</s>
<s>
The	O
tool	O
reads	O
net-list	O
files	O
of	O
other	O
similar	O
circuit	B-Language
simulation	I-Language
tools	O
such	O
as	O
Cadence	O
.	O
</s>
<s>
CoolSPICE	B-Algorithm
has	O
models	O
for	O
simulating	O
Wide-bandgap	O
semiconductor	O
devices	O
which	O
includes	O
power	O
MOSFETs	B-Architecture
,	O
SiC	O
BJTs	O
,	O
and	O
GaAs	O
power	O
FETs	O
.	O
</s>
<s>
The	O
SPICE	B-Protocol
simulation	O
models	O
for	O
SiC-power	O
MOSFET	B-Architecture
devices	O
for	O
the	O
software	O
were	O
developed	O
using	O
sub-circuits	O
built	O
around	O
the	O
standard	O
BSIM	B-Algorithm
MOSFET	B-Architecture
.	O
</s>
<s>
Power	O
devices	O
have	O
specific	O
behaviors	O
unique	O
to	O
themselves	O
and	O
certain	O
BSIM	B-Algorithm
equations	O
have	O
been	O
modified	O
in	O
order	O
to	O
account	O
for	O
that	O
factor	O
.	O
</s>
<s>
The	O
drain-to-gate	O
and	O
drain-to-source	O
capacitance	O
terms	O
were	O
modified	O
for	O
the	O
purpose	O
of	O
accounting	O
the	O
different	O
structures	O
of	O
power	O
MOSFET	B-Architecture
devices	O
.	O
</s>
<s>
Due	O
to	O
these	O
various	O
modifications	O
,	O
the	O
new	O
BSIM	B-Algorithm
equations	O
required	O
the	O
introduction	O
of	O
new	O
parameters	O
to	O
the	O
already	O
existing	O
MOSFET	B-Architecture
parameter	O
sets	O
.	O
</s>
<s>
The	O
resulting	O
new	O
models	O
with	O
both	O
common	O
BSIM	B-Algorithm
parameters	O
as	O
well	O
as	O
the	O
newly	O
introduced	O
parameters	O
necessitated	O
by	O
the	O
modifications	O
are	O
the	O
models	O
used	O
by	O
CoolSPICE	B-Algorithm
for	O
simulations	O
.	O
</s>
<s>
CoolSPICE	B-Algorithm
is	O
used	O
for	O
performing	O
thermal	O
analysis	O
of	O
circuit	O
operation	O
.	O
</s>
<s>
CoolSPICE	B-Algorithm
contains	O
a	O
library	O
for	O
these	O
thermal	O
simulations	O
.	O
</s>
