Method and system for creating a spectral null in a switching amplifier

Abstract

A method and system for creating a spectral null in a switching amplifier system is provided. The method includes receiving an input signal in a first modulated form at an input stage 104 of the amplifier. The method further includes converting the input signal to a second modulated form. The input signal in the second modulated form is referred to as a first switching signal. Further, the method includes determining switching frequency of the first switching signal from a predefined cycle time of the first switching signal. Thereafter, the method includes inverting the first switching signal and delaying it by a predefined delay amount. The inverted and delayed first switching signal is referred to as a second switching signal The method further includes summing the first switching signal from the second switching signal, which results in a two-state output signal. The two-state output signal is free of any components at the switching frequency and its odd harmonics.

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