"METHODS AND APPARATUS TO MEASURE A TRANSFER FUNCTION OF A CONTROL SYSTEM"
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United States of America Patent
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Issued Date -
Nov 20, 2008
app pub date -
Dec 31, 2007
filing date -
May 18, 2007
priority date (Note) -
Abandoned
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Abstract
Methods and apparatus to measure a transfer function of a control system are disclosed. An example method includes receiving a first signal from the power supply at a first point in the control loop at a digital signal processor, instructing the digital signal processor to add a reference signal having a predetermined frequency and a predetermined amplitude to the first signal to generate a combined signal in the digital signal processor, using the combined signal to generate a control signal for the power stage, sampling the control signal at a second point around the control loop in the digital signal processor to generate a sampled signal, comparing the sampled signal to the reference signal to determine a transfer function of the digital power supply, and displaying the transfer function on a user interface.
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