Patent ID: 8145312

Claim:
A control circuit for a power supply, comprising: an output; N circuit nodes where N is an integer greater than one; N charge storage devices; N amplifying devices, each of which has a main conduction path and a control terminal; a plurality of power inputs for connection to respective power generators; and a reference voltage input, said main conduction paths being connected in series and said control terminals being connected together to said reference voltage input, said main conduction path of an Nth one of said amplifying devices being connected between said output and an Nth one of said circuit nodes, which is connected to an Nth one of said charge storage devices, said main conduction path of each ith one of said amplifying devices, for each i such that 1≦i<N, being connected between an (i+1)th one of said circuit nodes and an ith one of said circuit nodes, which is connected to an ith one of said charge storage devices, each of said power inputs being connected to a respective one of said circuit nodes.