Patent ID: 6356469
Filing Date: 2002-03-12
Classification: H02M

Abstract:
A charge pump system for connection to a power supply voltage and a clock, comprising:a first phase bootstrapping circuit responsive to the clock to provide a first phase clock signal, the first phase bootstrapping circuit including: a first phase bootstrapping circuit input; an initial bootstrapping stage including switching circuits having an input and an output, the input connected to the first phase bootstrapping circuit input; a plurality of cascaded bootstrapping stages including switching circuits having an input and an output, the plurality of cascaded bootstrapping stages cascaded with the initial bootstrapping stage; and a plurality of first bootstrapping circuit outputs, each of the first bootstrapping circuit outputs connected to the output of one of the plurality of cascaded bootstrapping stages to provide an output with amplitude greater than the input thereof; inverting circuitry responsive to the clock with an inverted clock output opposite in phase to the clock; a second phase bootstrapping circuit responsive to the inverted clock output to provide a second phase clock signal opposite in phase to the first phase clock signal; and charge pump circuitry responsive to the power supply voltage and the first and second phase clocks whereby the power supply voltage is increased by alternately adding charge to the power supply voltage from the power supply voltage in each cycle of the first and second phase clock signals.