Importance

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Abstract

A charge pump circuit includes a charge pump which includes a first series connection of at least a first conductivity type field effect transistor between a high voltage line and an intermediate point connected to an output terminal; and a second series connection of at least a second conductivity type field effect transistor between a low voltage line and the intermediate point; a replica circuit which includes a third series connection of at least a first conductivity type field effect transistor between the high voltage line and the intermediate point; and a fourth series connection of at least a second conductivity type field effect transistor between the low voltage line and the intermediate point, the replica circuit has substantially the same circuit configuration and characteristics as the charge pump; and a control circuit connected to the charge pump and the replica circuit for controlling the charge pump and the replica circuit, so that an output voltage level of the replica circuit is equal to an output voltage level of the charge pump.

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First Claim