Amplifiers – With semiconductor amplifying device – Including class d amplifier
Reexamination Certificate
2008-10-23
2010-06-08
Choe, Henry K (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including class d amplifier
C330S20700P
Reexamination Certificate
active
07733178
ABSTRACT:
According to the invention, an audio amplifier system for use with a single-ended portable power supply that is referenced to ground, such as a small battery, has a single-channel class G amplifier section, a multiple voltage output charge pump subsystem for supplying complementary pairs of power supply voltages at selected ratiometric levels to an amplifier section, a set of switches on the power supply rails and a power-measuring comparator for selecting which complementary pair of power supply voltages is provided to the amplifier section.
REFERENCES:
patent: 4030045 (1977-06-01), Clark
patent: 4324950 (1982-04-01), Strickland
patent: 5038325 (1991-08-01), Douglas et al.
patent: 5072171 (1991-12-01), Eng
patent: 5115203 (1992-05-01), Krett et al.
patent: 5347171 (1994-09-01), Cordoba et al.
patent: 5491839 (1996-02-01), Schotz
patent: 5694072 (1997-12-01), Hsiao
patent: 6107886 (2000-08-01), Kusakabe
patent: 6215356 (2001-04-01), Servaes et al.
patent: 6256482 (2001-07-01), Raab
patent: 6304138 (2001-10-01), Johnson
patent: 6323729 (2001-11-01), Sevenhans et al.
patent: 6417736 (2002-07-01), Lewyn
patent: 6486733 (2002-11-01), Myers et al.
patent: 6504426 (2003-01-01), Picha et al.
patent: 6538514 (2003-03-01), Harvey
patent: 6614310 (2003-09-01), Quarfoot et al.
patent: 6636103 (2003-10-01), Wurcer et al.
patent: 6639815 (2003-10-01), Gucyski
patent: 6815988 (2004-11-01), Sanduleanu
patent: 6836095 (2004-12-01), Fogg
patent: 6838942 (2005-01-01), Somerville et al.
patent: 6853244 (2005-02-01), Robinson et al.
patent: 6975175 (2005-12-01), Sanduleanu
patent: 6982600 (2006-01-01), Harvey
patent: 6987417 (2006-01-01), Winter et al.
patent: 6993302 (2006-01-01), Bausov et al.
patent: 6998914 (2006-02-01), Robinson
patent: 7026868 (2006-04-01), Robinson et al.
patent: 7034614 (2006-04-01), Robinson et al.
patent: 7042284 (2006-05-01), Moons et al.
patent: 7043213 (2006-05-01), Robinson et al.
patent: 7061327 (2006-06-01), Doy
patent: 7061328 (2006-06-01), Doy
patent: 7106135 (2006-09-01), Makino et al.
patent: 7183857 (2007-02-01), Doy et al.
patent: 2008/0088371 (2008-04-01), You et al.
patent: WO 97/23005 (1997-06-01), None
patent: WO 00/00983 (2000-01-01), None
“TDA7563 Multifunction Quad Power Amplifier with Built-In Diagnostics Features,” May 2003. ST Microelectronics.
MAX9730 2.4W, Single-Supply, Glass G Amplier, Dec. 2006, Maxim Integrated Products.
International Search Report PCT/US07/064546 dated Feb. 28, 2008.
International Search Report PCT/US07/064545 dated Feb. 28, 2008.
International Search Report PCT/US07/064543 dated Feb. 22, 2008.
Delano Cary L.
North Brian B.
Choe Henry K
Fairchild Semiconductor Corporation
Schwegman Lundberg & Woessner, P.A.
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