Method and system for creating a spectral null in a...

Details Method and system for creating a spectral null in a... Method and system for creating a spectral null in a...

2008-07-22

2008-07-22

Pascal, Robert (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C300S013000, C300S013000

Reexamination Certificate

active

07403066

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 stage104of 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.

REFERENCES:
patent: 5617058 (1997-04-01), Adrian et al.
patent: 6587010 (2003-07-01), Wagh et al.
patent: 6605991 (2003-08-01), Midya et al.

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