Apparatus and method for a driver with an adaptive drive strength for a class D amplifier
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United States of America Patent
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Jun 5, 2007
Grant Date -
N/A
app pub date -
Jan 25, 2005
filing date -
Jan 25, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A circuit for adaptively adjusting the drive strength of output power transistors in a class D amplifier is provided. The circuit includes a driver circuit and a low-voltage detect circuit. The low-voltage detect circuit is arranged to assert a low-voltage detect signal if a low supply voltage condition is detected. The driver circuit is arranged to increase the drive strength if the low-voltage detect signal is asserted. The driver circuit includes a first driver and a second driver. The second driver is enabled if the low-voltage detect signal is asserted, and disabled if the low-voltage detect signal is unasserted.
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