Apparatus and system for noise cancellation of power converters

A system comprising:

• means for supplying power to at least one load device;
• means for creating a primary electro-magnetic interference signal at a primary switching node;
• means for operating in at least a phase inverted synchronous mode with said means for supplying power, wherein the phase of said means for supplying power is an inverse of the phase of the means for operating in a phase inverted synchronous mode, the operation of the means for supplying power is synchronous to the operation of the means for operating in a phase inverted synchronous mode and operating on the same clock signal;
• means for creating a noise cancellation electro-magnetic interference signal at a secondary switching node, wherein the noise cancellation electro-magnetic interference signal are synchronized and operate in inverse phase with said primary electro-magnetic interference signal, thereby, creating a resultant electro-magnetic interference signal, which is an algebraic sum of the primary electro-magnetic interference signal and the noise cancellation electro-magnetic interference signal, and wherein said resultant electro-magnetic interference signal having a substantially reduced amplitude;
• means for adjusting at least one of a frequency and amplitude of at least one of the primary electromagnetic interference signal and the noise cancellation electromagnetic interference signal;
• and
• means for operatively connecting said means for supplying power and said means for operating in a phase inverted synchronous mode.

A system comprising:

• a primary converter, said primary converter being operable to supply power to at least one load device, said primary converter comprising;
• a primary switching regulator, said switching regulator being configured to switch states between on and off;
• and
• a primary switching node, wherein the switching operation of the primary switching regulator being operable to create a primary electro-magnetic interference signal at the primary switching node;
• a noise cancellation converter being configured for phase inverted synchronous operation with respect to said primary converter, said noise cancellation converter further being configured with parasitic components substantially matching parasitic components of the primary converter, said noise cancellation power converter comprising;
• a secondary switching regulator, said switching regulator being configured to switch states between on and off in said phase inverted synchronous operation with said first switching regulator, wherein the phase of said primary converter is an inverse of the phase of the noise cancellation converter;
• and
• a secondary switching node, wherein the switching operation of the secondary switching regulator circuit creates a noise cancellation electro-magnetic interference signal at the secondary switching node, the noise cancellation electro-magnetic interference signal are synchronized and operate in inverse phase with said primary electro-magnetic interference signal, thereby, creating a resultant electro-magnetic interference signal, which is an algebraic sum of the primary electro-magnetic interference signal and the noise cancellation electro-magnetic interference signal, and wherein said resultant electro-magnetic interference signal having a substantially reduced amplitude;
• and
• an RC network component, said RC network component being configured to operatively connect the primary converter and the noise cancellation converter, said RC network component being operable to cancel out the resultant electro-magnetic interference signal.