Direct current (dc) bus electromagnetic interference (emi) filtering for power adapters

A method comprising:

• converting, by a rectifier, an input alternating current (AC) power signal on an AC bus into an input direct current (DC) power signal on an input DC bus;
• filtering, by a split differential mode (DM) choke connected to the input DC bus, differential mode noise on the input DC bus, wherein the split DM choke comprises a first DM choke on a high side of the input DC bus and a second DM choke on a low side of the input DC bus;
• and
• generating, by a switched mode power converter and using the input DC power signal, an output DC power signal for output on an output DC bus.

A system comprising:

• a power adapter comprising:
• a rectifier configured to convert an input alternating current (AC) power signal on an AC bus into an input direct current (DC) power signal on an input DC bus;
• a split differential mode (DM) choke connected to the input DC bus, wherein the split DM choke comprises a first DM choke on a high side of the input DC bus and a second DM choke on a low side of the input DC bus;
• and
• a switched mode power converter configured to output, using the input DC power signal, an output DC power signal on an output DC bus;
• and
• a computing device configured to receive the output DC power signal via the output DC bus.