Bio Instrumentation Exam 2 Questions
And Answers 2026 Update!!!
to extract a signal at 318 Hz, it is necessary to
use a that will pass only frequencies we filter
want to keep
is a completely random signal
its amplitude and phase cannot be
predicted, and in the real world it is noise
superimposed on the signal we want to
measure
can arise from many sources, both internal
Noise
and external to a measurement system
noise sources
can be predicted by theoretical
equations
fundamental
examples
shot noise - white noise
thermal - Johnson noise
noise sources
can be reduced by good experimental
design (cannot be calculated)
external
examples:
60 Hz mains pickup
high-current AC circuits
noise levels are used since random
noise is equally likely to be positive or negative, root-mean-square
leading to an average level of zero
, if noise from multiple sources is combined, the
overall RMS noise is found by combining individual
sources in quadrature
the combined nose level is dominated by the
largest
individual noise source
And Answers 2026 Update!!!
to extract a signal at 318 Hz, it is necessary to
use a that will pass only frequencies we filter
want to keep
is a completely random signal
its amplitude and phase cannot be
predicted, and in the real world it is noise
superimposed on the signal we want to
measure
can arise from many sources, both internal
Noise
and external to a measurement system
noise sources
can be predicted by theoretical
equations
fundamental
examples
shot noise - white noise
thermal - Johnson noise
noise sources
can be reduced by good experimental
design (cannot be calculated)
external
examples:
60 Hz mains pickup
high-current AC circuits
noise levels are used since random
noise is equally likely to be positive or negative, root-mean-square
leading to an average level of zero
, if noise from multiple sources is combined, the
overall RMS noise is found by combining individual
sources in quadrature
the combined nose level is dominated by the
largest
individual noise source
