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    Digital power supply control

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    7705577.pdf (748.5Kb)
    Downloads: 100
    Publication Date
    2010-04-27
    Filing Date
    2007-05-30
    Inventor
    Lee, Fred C.
    Li, Jian H.
    Xu, Ming Gang
    Qiu, Yang
    Metadata
    Show full item record
    Abstract
    A switched voltage regulator provides improved regulation at a lower clock rate/sampling frequency (e.g. several orders of magnitude lower than would be required for comparable regulation) while using a low resolution digital pulse width modulator such that limit cycle oscillations occur (and thus of low cost and complexity and small size) by limiting the amplitude of limit cycle oscillations which therefore need not be avoided by more complex arrangements which are not commercially feasible. Limiting of amplitude of limit cycle oscillations is achieved by adding essentially a digitized ripple voltage signal corresponding to the difference between the output of the voltage regulator and an average output of the voltage regulator as an input to the digital pulse width modulator. Performance of this arrangement may be enhanced by adding a ramp signal to the digitized ripple voltage signal and even further enhanced by limiting the ramp signal to a range which corresponds to steady state operation but not transients.
    Assignee
    Virginia Tech Intellectual Properties, Inc.
    Patent Number
    7705577
    Application Number
    11755331
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/77/055/077/0.pdf
    Primary/U.S. Class
    323/283
    Other/U.S. Class
    CPC Class
    H02M3/157
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72631
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    • Virginia Tech Patents [687]

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