Single inductor dual output voltage converter and the method thereof
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United States of America Patent
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Jun 12, 2018
Issued Date -
Nov 9, 2017
app pub date -
Mar 30, 2017
filing date -
May 5, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A voltage converter provides a positive voltage and a negative voltage with a single inductor. The voltage converter has a first switch, a second switch, a third switch and a fourth switch switched periodically, wherein each switching period comprise a first time period, a second time period and a third time period, and wherein: during the first time period, the first switch and the fourth switch are turned on, whereas the second switch and the third switch are turned off; during the second time period, the first switch and the third switch are turned on, whereas the second switch and the fourth switch are turned off; and during the third time period, the second switch and the fourth switch are turned on, whereas the first switch and the third switch are turned off.
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