Patent ID: 8754672
Filing Date: 2014-06-17
Classification: H02M,H03K

Abstract:
1. A reversible, switched capacitor voltage conversion apparatus, comprising: a plurality of individual unit cells coupled to one another in stages, with each unit cell comprising multiple sets of inverter devices arranged in a stacked configuration, such that each set of inverter devices operates in separate voltage domains wherein for each inverter device in each of the plurality of unit cells, outputs of each of the inverter devices in adjacent voltage domains are capacitively coupled to one another such that a first terminal of a capacitor is coupled to an output of a first inverter device in a first voltage domain, and a second terminal of the capacitor is coupled to an output of a second inverter in a second voltage domain; wherein, for both the first and second voltage domains, a first of the plurality of individual unit cells serve as corresponding inputs for a second of the plurality of individual unit cells, and for both the first and second voltage domains, outputs of the second of the plurality of individual unit cells serve as corresponding inputs for a third of the plurality of individual unit cells; and for both the first and second voltage domains, outputs of a last of the plurality of individual unit cells comprise inputs to a first of the plurality of individual unit cells in a ring oscillator type structure.