Patent ID: 7619471

Claim:
A method of operating a speaker comprising: a) converting an audio signal to a pulse-width modulated signal comprising a plurality of positive pulses and a plurality of negative pulses as a function of the audio signal; b) driving an H-bridge circuit interconnected to a speaker, wherein the H-bridge circuit comprises an A-side and a B-side, wherein the A-side comprises a first switching transistor and a second switching transistor, and wherein the B-side comprises a first switching transistor and a second switching transistor; comprising the steps of: i) driving, for each positive pulse, the A-side of the H-bridge circuit by pushing the first switching transistor of the A-side while grounding the second switching transistor of the A-side and grounding the first switching transistor of the B-side; and ii) driving, for each negative pulse, the B-side of the H-bridge circuit by pushing the first switching transistor of the B-side while grounding the second switching transistor of the B-side and grounding the first switching transistor of the A-side.