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Charge pump type booster circuit

  • US 6,097,161 A
  • Filed: 04/08/1999
  • Issued: 08/01/2000
  • Est. Priority Date: 04/10/1998
  • Status: Expired due to Term
First Claim
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1. 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; and

    control 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.

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