Patent ID: 8330541

Claim:
A multilevel class-D amplifier comprising: a first power stage having a first input, a second input, an output and at least three power inputs, said first power stage including logic such that when said first input is at a first logic level said output is at a first voltage level, when said first input is at a second logic level and said second input is at said first logic level said output is at a second voltage level, and when both said first input and said second input are at said second logic level said output is at a third voltage level; a second power stage having a first input, a second input, an output and at least three power inputs, said second power stage including logic such that when said first input is at a first logic level said output is at a first voltage level, when said first input is at a second logic level and said second input is at said first logic level said output is at a second voltage level, and when both said first input and said second input are at said second logic level said output is at a third voltage level; and a first triangle wave generator output coupled to said first input of said first power stage and said first input of said second power stage and a second triangle wave generator output coupled to said second input of said first power stage and said second input of said second power stage; wherein said at least three power inputs include a ground input, a battery input and a boost input, whereby said first voltage level is related to a ground potential, said second voltage level is related to a battery potential and said third voltage level is related to a boost potential; and wherein said first logic level is one of 0 and 1 and wherein said second logic level is the other one of 0 and 1.