Patent ID: 7196892
Filing Date: 2007-03-27
Classification: H02M

Abstract:
1. An apparatus for isolating RFI, EMI, and noise transients in AC power supply circuits, the power supply circuit having an input and an output, said apparatus comprising: a first current path having a first current path first switch, first current path storage means, and a first current path second switch; a second current path parallel to said first current path, and having a second current path first switch second current path storage means, and a second current path second switch; and a control module for controlling all of said switches such that said first and second current paths alternate operation in time with the corresponding positive and negative polarities of the power line frecquency, and such that during the charge cycle of said first current path, said first current path second switch is open and blocks transients and noise from the input to the output, and said second current path second switch is closed, allowing the supply of current to the output, and said second current path first switch is open and blocks input transients and noise to the output, and during the charge cycle of said second current path, said second current path second switch is open and blocks transients and noise from the input to the output, and said first current path second switch is closed, allowing the supply of current to the output while said first current path first switch is open and blocks input transients and noise to the output.