Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
September 23, 2008
Patent Application Number
11709915
Date Filed
February 22, 2007
Patent Primary Examiner
Patent abstract
Provided is a charge pump circuit whose power efficiency is not reduced even when a threshold voltage of a transistor is increased by a substrate effect with an increase in the number of stages. A depletion transistor is used as an N-channel transistor included in an inverter of a high-voltage clock generating circuit. A P-channel enhancement transistor is used as a charge transfer device.
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