RANDOM NOISE CONSIDERATIONS IN THE DESIGN OF MAGNETIC FILM SENSE AMPLIFIERS
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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A model of a magnetic film sense system is presented. Using the model the mean time between false readouts due to random noise is determined as a function of the system parameters total magnetic flux switched, switching time, sense line resistance, amplifier noise factor and linear amplifier filter efficiency. The filter efficiency with respect to a given input pulse shape is the signal-to-noise ratio at the output of the amplifier divided by the corresponding signal-to-noise ratio at the output of a filter matched to the pulse shape. The degradation of signal-to noise ratio caused by introduction of a quick recovery short time constant is determined and shown experimentally.
- Electrical and Electronic Equipment