Patent ID: 8836412

Claim:
A charge pump system, comprising: a charge pump circuit connected to receive N pump clock signals and generate therefrom an output voltage, where N is an integer greater than or equal to one; regulation circuitry connected to receive the output voltage and generate a regulation signal based on the output voltage; an oscillator circuit providing N initial clock signals; and N clock buffer circuits, each receiving a corresponding one of the initial clock signals and generating therefrom a corresponding one of the pump clock signals, wherein each of the buffer circuits includes: a plurality of inverters connected in series, with the first inverter in the series connected to receive the corresponding initial clock signal as input and the last inverter in the series providing the corresponding pump clock signal as output; and a corresponding plurality of clamp elements connected to receive the regulation signal and through which a corresponding one of the inverter is connected to a power supply level, the voltage level being supplied to the corresponding inverter being dependent upon the regulation signal.