Floating bridge amplifier system
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United States of America Patent
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Mar 6, 2007
Grant Date -
N/A
app pub date -
Jan 20, 2005
filing date -
Jan 21, 2004
priority date (Note) -
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Abstract
An audio amplifier system includes at least a pair of DC power supplies, a floating bridge current gain output section, and a differential voltage gain input section that draws operating current from the DC power supplies through floating DC current regulators. The included current regulators reject power supply noise and modulation and provide a floating current path for establishing positive and negative operating voltages for the voltage gain section. Cross-coupled interstage loading enables nearly rail-to-rail output voltage swing while providing local feedback around the output section for reduced distortion and improved output load control. The floating current regulators in the circuit exhibit enhanced performance as a result of suppressed operating voltage fluctuations.
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