Charge pump circuit
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United States of America Patent
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-
Aug 22, 2000
Grant Date -
N/A
app pub date -
Feb 1, 1999
filing date -
Aug 24, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A charge pump circuit comprises a plurality of booster stages. Each booster stage has a first node, a second node, a first charge pump and a second charge pump. Both charge pumps operate in a complementary manner, and raise potential of the second node relative to potential of the first node by transferring charge from the first node to the second node. Each charge pump comprises a pumping capacitor, an NMOS transistor and a PMOS transistor. In each charge pump, the NMOS transistor is used for charging the pumping capacitor with charge input through the first node, and the PMOS transistor is used for discharging the pumping capacitor to send charge to the second node.
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