Abstract: An amplifier system may include at least one alternating current (AC) input source, a first DC-DC converter configured to convert the AC voltage to a first rail voltage, a second DC-DC converter configured convert the AC voltage to a second rail voltage, and a Class D amplifier configured to receive the first rail voltage on a first positive rail from the first DC-DC converter and the second rail voltage on a second negative rail from the second DC-DC converter to reduce rail pumping of the first and second voltage rails.

Abstract: An amplifier system having first and second interleaved half bridge stages and a coupled inductor. The coupled inductor has a primary winding and a secondary winding, a first end of the primary winding is coupled to the first half bridge stage at a first node, a second end of the primary winding is coupled to the load, a first end of the secondary winding is coupled to the load, a second end of the secondary winding is coupled to the second half bridge stage at a second node. An inductor circuit is coupled between the first and second half bridge stages and a first end of a load circuit.