Patent ID: 7567118
Filing Date: 2009-07-28
Classification: H02M

Abstract:
1. A booster circuit operating based on a multiphase clock, comprising: an oscillation circuit for outputting sets of a plurality of oscillation clocks different in phase from each other and providing a set of plurality of source oscillation clocks different in phase from each other for each of multiphase clock generation circuits; said each of multiphase clock generation circuits for generating the multiphase clock based on the set of a plurality of source oscillation clocks different in phase from each other; a pump circuit for generating a boosted voltage based on the multiphase clock; a multiphase clock transfer control circuit for controlling whether to transfer the multiphase clock from the multiphase clock generation circuit to the pump circuit in accordance with a control signal; and a detection circuit for comparing the boosted voltage generated in the pump circuit with a predetermined target voltage, and outputting the control signal to said multiphase clock transfer control circuit, wherein when the multiphase clock transfer control circuit ceases to transfer the multiphase clock, the multiphase clock is held at a value taken at a time of ceasing transfer of the multiphase clock, and the multiphase clock transfer control circuit restarts transferring the multiphase clock when the multiphase clock generated by the multiphase clock generation circuit takes the value taken at a time of ceasing to be transferred.