AUDIO REPRODUCTION SYSTEM
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United States of America Patent
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Issued Date -
Sep 24, 2009
app pub date -
Mar 19, 2009
filing date -
Mar 19, 2008
priority date (Note) -
Abandoned
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Abstract
The audio reproduction system amplifies and reproduces both a digital audio signal and an analog audio signal. After delta sigma modulation by a ΔΣ modulator, the digital audio signal is pulse width modulated by a first PWM converter and supplied to a selector. The analog audio signal is compared with a PWM carrier signal by a second PWM converter, converted to a PWM signal, and supplied to the selector. A signal selected by the selector is then amplified by a class D amplifier.
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