Patent ID: 6097161
Filing Date: 2000-08-01
Classification: H02M

Abstract:
A charge pump type booster circuit comprising:a charge pump series in which a capacitor and a switching element for transferring an electric charge of the capacitor to the next stage are connected in series in a plurality of stages, the charge pump series including a first capacitor group and a second capacitor group;a first driver for applying a coupling to each capacitor of said first capacitor group;a second driver for applying the coupling to each capacitor of said second capacitor group;an equalizer for performing the capacitance coupling between said first capacitor group and said second capacitor group; andcontrol circuit for controlling operations of said driver and said equalizer, whereinwhen said first capacitor group has a first electric potential, and said second capacitor group has a second electric potential lower than said first electric potential, said control circuit allows said equalizer to perform the capacitance coupling, charges said second capacitor group with a resulting discharge current of said first capacitor group, applies said coupling by said first driver, and applies said coupling by said second driver.