<s>
In	O
electronics	O
,	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
(	O
PTL	O
)	O
describes	O
several	O
logic	B-General_Concept
families	I-General_Concept
used	O
in	O
the	O
design	O
of	O
integrated	O
circuits	O
.	O
</s>
<s>
Pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
often	O
uses	O
fewer	O
transistors	O
,	O
runs	O
faster	O
,	O
and	O
requires	O
less	O
power	O
than	O
the	O
same	O
function	O
implemented	O
with	O
the	O
same	O
transistors	O
in	O
fully	O
complementary	O
CMOS	O
logic	O
.	O
</s>
<s>
Some	O
authors	O
use	O
the	O
term	O
"	O
complementary	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
"	O
to	O
indicate	O
a	O
style	O
of	O
implementing	O
logic	O
gates	O
that	O
uses	O
transmission	O
gates	O
composed	O
of	O
both	O
NMOS	O
and	O
PMOS	O
pass	O
transistors	O
.	O
</s>
<s>
Other	O
authors	O
use	O
the	O
term	O
"	O
complementary	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
"	O
(	O
CPL	O
)	O
to	O
indicate	O
a	O
style	O
of	O
implementing	O
logic	O
gates	O
where	O
each	O
gate	O
consists	O
of	O
a	O
NMOS-only	O
pass	O
transistor	O
network	O
,	O
followed	O
by	O
a	O
CMOS	O
output	O
inverter	O
.	O
</s>
<s>
Other	O
authors	O
use	O
the	O
term	O
"	O
complementary	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
"	O
(	O
CPL	O
)	O
to	O
indicate	O
a	O
style	O
of	O
implementing	O
logic	O
gates	O
using	O
dual-rail	O
encoding	O
.	O
</s>
<s>
Complementary	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
or	O
"	O
Differential	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
"	O
refers	O
to	O
a	O
logic	B-General_Concept
family	I-General_Concept
which	O
is	O
designed	O
for	O
certain	O
advantage	O
.	O
</s>
<s>
It	O
is	O
common	O
to	O
use	O
this	O
logic	B-General_Concept
family	I-General_Concept
for	O
multiplexers	O
and	O
latches	B-General_Concept
.	O
</s>
<s>
Static	O
and	O
dynamic	O
types	O
of	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
exist	O
,	O
with	O
differing	O
properties	O
with	O
respect	O
to	O
speed	O
,	O
power	O
and	O
low-voltage	O
operation	O
.	O
</s>
<s>
As	O
integrated	O
circuit	O
supply	O
voltages	O
decrease	O
,	O
the	O
disadvantages	O
of	O
pass	B-General_Concept
transistor	I-General_Concept
logic	I-General_Concept
become	O
more	O
significant	O
;	O
the	O
threshold	O
voltage	O
of	O
transistors	O
becomes	O
large	O
compared	O
to	O
the	O
supply	O
voltage	O
,	O
severely	O
limiting	O
the	O
number	O
of	O
sequential	O
stages	O
.	O
</s>
