Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 8, 2010
Patent Application Number
12257287
Date Filed
October 23, 2008
Patent Primary Examiner
Patent 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.
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