Patent ID: 6697266
Filing Date: 2004-02-24
Classification: H02M

Abstract:
A device for preparing a direct current (DC) signal from a plurality of input signals, comprising:a plurality of transformers, each transformer having first and second input connections and first and second output connections; a respective source of time varying input signals connected to the first input connection of each transformer, wherein (a) each time varying input signal alternates between a positive and negative voltage and (b) time varying input signals connected to different first input connections have different phases; an overlaying circuit for combining signals output by the transformers, the output signal of each transformer comprising an asymmetric time-varying signal having a respective different phase, to thereby prepare the DC signal, the overlaying circuit comprising: a first node to which the first output connection of each transformer is connected, wherein an electrical path between the first output connection of each transformer and the first node includes a rectifier; a second node to which the second output connection of each transformer is connected; and first and second output terminals respectively connected to the first and second nodes.