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Active EMI filter

  • US 20040008527A1
  • Filed: 06/24/2003
  • Published: 01/15/2004
  • Est. Priority Date: 06/25/2002
  • Status: Active Grant
First Claim
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1. A filter for an electrical power system, comprising:

  • a plurality of voltage storage devices coupled to system lines to obtain voltages related to currents in the respective lines;

    an error amplifier coupled to the voltage storage devices and operable to output a signal based on a difference in voltage between the voltage storage devices;

    the output signal coupled to another voltage storage device to obtain a voltage with respect to the output signal; and

    wherein the voltage obtained from the output signal influences the difference in voltages between the voltage storage devices to decrease the difference.

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