Method for correcting a harmonic distortion of a power...

Details Method for correcting a harmonic distortion of a power... Method for correcting a harmonic distortion of a power...

2006-10-20

2010-02-23

Shingleton, Michael B (Department: 2815)

Amplifiers

Modulator-demodulator-type amplifier

C330S149000, C330S151000

Reexamination Certificate

active

07667537

ABSTRACT:
To correct for harmonic distortion of a power bridge, the form of a pulse at the output of the power bridge and of estimate of non idealities under different current conditions is acquired. An estimate of a current at the output of the power bridge is also acquired. The switching control signal applied to the power bridge is then regulated based on the acquired estimates. More specifically, an area error introduced by the estimated non-idealities of the power bridge for a certain output current is determined and the edges of the switching control signal input to the power bridge are temporally shifted in response to the determined area error so as to account for the determined area error and correct for harmonic distortion concerns in the output signal.

REFERENCES:
patent: 5617058 (1997-04-01), Adrian et al.
patent: 6404280 (2002-06-01), Jeng et al.
patent: WO 2004/049561 (2004-06-01), None
patent: WO 2005/036734 (2005-04-01), None
European Search Report, EP 06 01 2940, dated Nov. 13, 2006.
Jun Honda and Jorge Cereza, International Rectifier, “Class D Audio Amplifier Design,” www.irf.com, dated Oct. 8, 2003.
W. Marshall Leach, Jr., “Class-D Amplifier”, excerpt from the bookIntroduction to Electroacoustics and Audio Amplifier Design, Second Edition, Revised Printing 2001.
Jun Honda & Jonathan Adams, International Rectifier, Application Note AN-1071, “Class D Audio Amplifier Basics,” www.irf.com, dated Feb. 8, 2005.

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