Patent ID: 6960955
Filing Date: 2005-11-01
Classification: H02M

Abstract:
1. A charge pump-type booster circuit, comprising: a pair of input terminals for providing an input voltage; a charge capacitor; a first pair of switches capable of alternatively assuming a first condition, coupling said charge capacitor across said pair of input terminals to charge said charge capacitor to a voltage level substantially equal to the voltage level of the input voltage, and a second condition decoupling said charge capacitor from across said input terminals; a first output capacitor; a second pair of switches capable of assuming a first condition, coupling said first output capacitor across a first serial combination, comprising said input terminals and said charge capacitor, to charge said first output capacitor to a voltage level substantially twice the voltage level of the input voltage, and a second condition, decoupling said first output capacitor from said first serial combination; a second output capacitor; a third pair of switches capable of assuming a first condition, coupling said second output capacitor across a second serial combination, comprising said charge capacitor and said first output capacitor, to charge said second output capacitor to a voltage level substantially three times the voltage level of the input voltage, and a second condition, decoupling said second output capacitor horn said second serial combination; a first load connected in parallel with said first output capacitor; and a second load connected in parallel with said second output capacitor.