Quasi-parallel voltage regulator
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United States of America Patent
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Jan 18, 2011
Grant Date -
Aug 20, 2009
app pub date -
Feb 20, 2008
filing date -
Feb 20, 2008
priority date (Note) -
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Abstract
Improved regulation and transient response are provided by a power supply architecture providing both unregulated and regulated voltage converters in parallel but deriving input power from separate power supplies connected in series wherein regulated and unregulated branches each provide a substantially fixed and constant proportion of the output current. The series connection of input power sources may provide a further feedback mechanism in addition to feedback for regulation which enhances overall performance. As a perfecting feature of the invention, inductor-less resonant converters which are switched in an interleaved fashion may be used in the unregulated branch while substantially cancelling the characteristic large output voltage ripple thereof.
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