Charge Pump Circuit
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United States of America Patent
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Issued Date -
Aug 15, 2013
app pub date -
Feb 13, 2013
filing date -
Feb 14, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A charge pump circuit according to the present invention includes a plurality of charge pump units each including a capacitor and connected to each other in parallel; a current source connected to commonly connected power source terminals of the plurality of charge pump units; and a control circuit connected to commonly connected output terminals and controlling an amount of a current to be supplied by the current source to the commonly connected power source terminals based on an output signal at the output terminals output signal from the plurality of charge pump units. Always in at least one charge pump unit, a current from the current source via the power source terminal is supplied to the capacitor. A spike noise due to a change in current is not generated and characteristics degradation of the other circuit can be prevented.
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