Exponential voltage conversion switched capacitor charge pump
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United States of America Patent
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Jan 29, 2013
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app pub date -
Dec 15, 2010
filing date -
May 18, 2010
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Abstract
Described herein are switched capacitor charge pump designs for a 2n× voltage converter. The 2n× voltage converter is constructed by cascading n units of substantially identical unit cells, which are respectively composed of cross-coupled single cell doubler circuits. Dynamic inverters are used to completely activate and deactivate the power switches in the respective unit cells to increase area efficiency. The charge pump designs described herein are implemented with standard high-voltage CMOS processes without requiring MOSFET transistors with different threshold voltages, giving the charge pump a regular structure that simplifies design and layout and reduces production costs. In addition, techniques for constructing a charge pump according to the designs provided herein are described.
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