Amplifiers – With semiconductor amplifying device – Including class d amplifier
Reexamination Certificate
2011-04-12
2011-04-12
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including class d amplifier
Reexamination Certificate
active
07924091
ABSTRACT:
The invention relates to a class-D audio amplifier. The class-D audio amplifier is configured in a current feedback mode as a voltage-controlled current source and a passive inductor/capacitor (LC) reconstruction filter. A portion of the passive LC reconstruction filter is situated in a feedback loop to an error amplifier.
REFERENCES:
patent: 7196580 (2007-03-01), Ryoo et al.
patent: 2005/0162223 (2005-07-01), Maejima
Mills, P.G.L., et al.;Transconductance Power Amplifier Systems for Current-Driven Loudspeakers; J. Audio Eng. Soc.; Oct. 1989; vol. 37, No. 10; pp. 809-822.
Mills, P.G.L., et al.; Distortion Reduction in Moving-Coil Loudspeaker Systems Using Current-Drive Technology; J. Audio Eng. Soc.; Mar. 1989; vol. 37, No. 3; pp. 129-148.
Strydom, Johan, et al.; 120 W x 2 Channel Class D Audio Power Amplifier Using IRS20955 and IRF6645 International Rectifier; Reference Design; pp. 1-42.
Designing Practical High Performance Class D Audio Amplifier; International Rectifier; Class D Audio.
Horbach Ulrich
Waas Jaye
Harman International Industries Incorporated
Nguyen Khanh V
The Eclipse Group LLP
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