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US 7,239,194 B2Granted
Trench capacitor power supply system and method
AssigneeIntegral Wave Technologies, Inc.
InventorsFiras Azrai, Michael Yates, David Nelms
Life of this patent
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Abstract
A plurality of trenched capacitors are grouped in phases. A control circuit switches each phase between charging and discharging states devised to supply one or more loads with controlled power.
Claims24
A power converter system comprising:
- (a) a plurality of trench capacitors, each having a positive terminal and a negative terminal, arranged in one or more phases with one or more charging switches electrically between respective pairs of the capacitors in each phase;
- (b) one or more voltage supply switches connecting the positive terminal of a respective one or more of the plurality of capacitors to a voltage input terminal;
- (c) one or more first discharging switches connecting the positive terminal of a respective one or more of the plurality of capacitors to an output terminal for that phase;
- (d) one or more second discharging switches connecting the negative terminals of respective ones of the plurality of capacitors to a selected reference potential;
- (e) a control stage operatively connected to all of the switches, the control stage operative to activate and de-activate selected ones of the switches of a selected phase to change between a first charging mode and a second discharging mode, the control stage operative to activate selected ones of the voltage-shifting switches of the selected phase prior to activating selected ones of the second discharging switches.
2 more elements
A switched-capacitor power supply comprising:
- a plurality of capacitors formed in trenches, each of the plurality of capacitors comprising a first terminal layer, an insulative layer disposed atop the first terminal layer, and a second terminal layer disposed atop the insulative layer;
- a plurality of charging transistors formed on an integrated circuit, the charging transistors operative to charge the plurality of capacitors;
- a plurality of discharging transistors formed on the integrated circuit, the discharging transistors operative to discharge the plurality of capacitors.
Dependencies are inferred from the claim text.