Patent ID: 9491314
Filing Date: 2016-11-08
CPC Classification: H02M,H03F,H04M

Claim Text:
1. A voltage supply stage comprising an input supply voltage, a first and second switch connected in series, the first and second series-connected switches being connected in parallel with the input supply voltage between first and second terminals of the input supply voltage, a third switch and capacitor connected in series, the series-connected third switch and capacitor being connected in parallel with the first switch, a fourth switch connected between the connection of the third switch and the capacitor and an output, and a fifth switch connected between the output and a terminal of the input supply voltage, wherein: in a first phase of operation, the first and the fourth switch are closed, and the second, third and fifth switches are open; in a second phase of operation, the second, third and fifth switches are closed, and the first and fourth switches are open; and a duty cycle of the first and second phases is controlled such that an average voltage on the output varies between 0 volts and twice the input supply voltage.