Boosted-rail amplifier
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United States of America Patent
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-
Jul 3, 2012
Grant Date -
Mar 3, 2011
app pub date -
Jul 16, 2010
filing date -
Aug 28, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An amplifier device including an amplifier having an input for receiving an audio input signal and an output for sending an output signal to a load. A boosted-rail circuit is connected to a power source and has a single boosted rail connected to the BTL amplifier. Also, a common-mode circuit is coupled to the boosted-rail circuit and the BTL amplifier. The common-mode circuit sends a common-mode signal to the BTL amplifier that will dynamically track the output voltage supplied from the boosted-rail circuit to the BTL amplifier. In operation, the boosted-rail circuit reacts to the BTL amplifier and switches from a non-boost mode to a boost mode to increase the output voltage supplied to the BTL when the BTL amplifier requires additional voltage.
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