HW 3-Signal and Noise answers

HW 3-Signal and Noise answers -...

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Unformatted text preview: HW
3‐Signal
and
Noise
 1.  Name
the
types
of
noise
that
can
be
reduced
by:
 
a)
decreasing
the
temperature
of
the
measurement
 

 
 
 
Johnson
Noise
 
b)
decreasing
the
frequency
used
for
the
measurement
 A
type
of
noise
called
“flicker”
or
“1/f”
noise,
which
we
didn’t
discuss.
Sorry
I
asked.
 
c)
decreasing
the
bandwidth
of
the
measurement
 

 
 
Johnson
and
Shot
Noise
 2.
The
following
data
were
obtained
for
repeMMve
weighing
of
a
1.004g
 standard
weight:
 1.003
 1.004
 1.001
 1.000
 1.005
 0.999
 1.001
 1.006
 1.007
 Assuming
the
noise
is
random,
calculate
the
S/N
for
the
balance.
 How
many
measurements
would
have
to
be
averaged
to
obtain
a
S/N
of
500?
 S/N
=
358
 N
=
18
 ...
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This note was uploaded on 11/16/2011 for the course CHEM 4011 at Colorado.

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