Amplifiers – With semiconductor amplifying device – Including class d amplifier
Reexamination Certificate
2011-03-15
2011-03-15
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including class d amplifier
C330S010000, C330S149000
Reexamination Certificate
active
07907010
ABSTRACT:
Recently, the use of class-D audio amplifiers has become more and more widespread. In contrast to the generally employed class-AB linear amplification technology, class-D allows for improved efficiency. However, the class-D principle is known for its poor distortion characteristics. According to the present invention a digital amplifier (18) is provided for converting an audio signal to a power output, comprising a ripple suppression circuit (16) for suppressing voltage ripples in a supply voltage supplied to the bridge circuit with (6) at least one pair of switches. The ripple suppression circuit (16) suppresses ripples in the supply voltage supplied to a switch in the bridge circuit (6), which has been found to cause a major part of the distortions in the output signal of the digital amplifier (18).
REFERENCES:
patent: 5513094 (1996-04-01), Stanley
patent: 5559467 (1996-09-01), Smedley
patent: 6028476 (2000-02-01), Schweighofer
patent: 6138042 (2000-10-01), Midya et al.
patent: 6646507 (2003-11-01), Prokin et al.
patent: 6825726 (2004-11-01), French et al.
Dürbaum Thomas
Esguevillas F. Javier
Mosely Iain
Sauerländer Georg
Van Der Broeck Heinz
Nguyen Patricia
NXP B.V.
LandOfFree
Digital amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2669509