Methods and apparatus for a switchable balun for combined Bluetooth® and WLAN operation
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United States of America Patent
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Feb 12, 2013
Grant Date -
Aug 25, 2011
app pub date -
Feb 19, 2010
filing date -
Feb 19, 2010
priority date (Note) -
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Abstract
Methods and apparatus for a switchable balun for combined BLUETOOTH® and WLAN operation. A switchable balun is provided that includes an input circuit for receiving an amplified signal, the input circuit comprising first and second coils connected at a center tap, an output circuit comprising a third coil that is inductively coupled to the first and second coils, the output circuit for outputting an adjusted version of the amplified signal for transmission in a selected transmission mode, and a switch coupled to the center tap, wherein the switch is configured to couple a first voltage to the center tap to select operation in a first transmission mode and to couple a second voltage to the center tap to select operation in a second transmission mode.
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