Patent ID: 7180760

Claim:
A system comprising: a capacitive voltage converter accepting input of a digital control signal for selection of a desired voltage level and outputting said desired voltage level, wherein said desired voltage level is selected from a plurality of voltage levels including non-integer fractional multiples of a supply voltage level used by said capacitive voltage converter; wherein the capacitive voltage converter comprises: a plurality of capacitors; and switching circuitry for selectively connecting to the plurality of capacitors, wherein said switching circuitry comprises a plurality of controllable switches, wherein the plurality of controllable switches includes at least a first switch having a higher relative voltage characteristic and a second switch having a lower relative voltage characteristic; wherein the capacitive voltage converter controls the switching circuitry to generate the desired voltage level according to the digital control signal, wherein the capacitive voltage converter selects between the first and second switches for output switching in relation to a magnitude of the desired voltage level.