ABOUT ELECTRIC NOISE
ALL ELECTRICAL SIGNALS ARE CORRUPTED BY
EXTERNAL, UNCONTROLLABLE AND OFTEN
UNMEASURABLE, SIGNALS. THESE UNDESIRED
SIGNALS ARE REFERRED TO AS NOISE
THE DERIVATIVE
SIMPLE MODEL FOR A NOISY  60Hz SINUSOID
CORRUPTED WITH ONE MICROVOLT OF 1GHz
INTERFERENCE.
noise
signal
noise
signal