<s>
A	O
bus-holder	B-Protocol
(	O
or	O
Bus-keeper	O
)	O
is	O
a	O
weak	O
latch	O
circuit	O
which	O
holds	O
last	O
value	O
on	O
a	O
tri-state	B-Device
bus	I-Device
.	O
</s>
<s>
Bus-holders	B-Protocol
are	O
used	O
to	O
prevent	O
CMOS	O
gate	O
inputs	O
from	O
getting	O
floating	O
values	O
when	O
they	O
are	O
connected	O
to	O
tri-stated	O
nets	O
.	O
</s>
<s>
Otherwise	O
both	O
transistors	B-Application
in	O
the	O
gate	O
could	O
get	O
turned	O
partially	O
on	O
,	O
increasing	O
power	O
consumption	O
and	O
noise	O
.	O
</s>
<s>
This	O
is	O
prevented	O
by	O
the	O
bus-holder	B-Protocol
pulling	O
the	O
input	O
to	O
the	O
last	O
valid	O
logic	O
level	O
(	O
0	O
or	O
1	O
)	O
on	O
the	O
net	O
.	O
</s>
