Charge pump circuit
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United States of America Patent
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May 25, 2010
Grant Date -
May 28, 2009
app pub date -
Oct 10, 2008
filing date -
Oct 12, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A charge pump circuit includes initialization units, each of which initializes a boost node to an initialization voltage. Boosting units each boost the boost node to a higher voltage than the initialization voltage in response to an input voltage. First and second pump circuits each include a transfer unit for transferring a voltage of the boost node to an output node and sharing the output node. The transfer unit of the first pump circuit includes two transfer transistors that are switched in response to a voltage of a control node of the first pump circuit and the voltage of the boost node of the second pump circuit. The transfer unit of the second pump circuit includes two transfer transistors that are switched in response to a voltage of a control node of the second pump circuit and the voltage of the boost node of the first pump circuit.
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