Patent ID: 8482350

Claim:
A switching amplifier, comprising: a first switch having a control terminal, a first terminal connected to a first supply voltage, and a second terminal connected to a first output node, wherein the first switch is configured to be controlled by a first control signal applied to the control terminal of the first switch; a second switch having a control terminal, a first terminal connected to a second supply voltage, and a second terminal connected to the first output node, wherein the second switch is configured to be controlled by a control signal applied to the control terminal of the second switch; a third switch having a control terminal, a first terminal connected to the first supply voltage, and a second terminal connected to a second output node, wherein the third switch is configured to be controlled by a third control signal applied to the control terminal of the third switch; a fourth switch having a control terminal, a first terminal connected to the second supply voltage, and a second terminal connected to the second output node, wherein the fourth switch is configured to be controlled by a control signal applied to the control terminal of the fourth switch; and a modulator having an input terminal coupled to receive an input signal and respective output terminals coupled to the control terminals of the first, second, third, and fourth switches, wherein the modulator is configured to receive the input signal and, in response to the input signal, to apply a pulse to the respective control terminals of the first and second switches to render the first switch conductive and the second switch non-conductive, wherein the pulses applied to the respective control terminals of the first and second switches have a width that is determined by the input signal, wherein the pulses applied to the respective control terminals of the first and second switches occur at regular intervals, wherein the modulator is further configured to, in response to the input signal, apply a pulse to the respective control terminals of the third and fourth switches to render the third switch conductive and the fourth switch non-conductive, and wherein the pulses applied to the respective control terminals of the third and fourth switches have a constant width and occur at irregular intervals.