PROTECTION CIRCUIT OF POWER AMPLIFICATION CIRCUIT AND POWER AMPLIFICATION CIRCUIT USING THE SAME
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United States of America Patent
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Issued Date -
Jan 26, 2017
app pub date -
Feb 24, 2016
filing date -
Jul 20, 2015
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Abstract
A protection circuit of a power amplifier includes a first current mirror configured to supply a current mirrored to a first reference current as a bias current of a driver amplifier; and a current sink configured to adjust a bias current of the driver amplifier by sinking the first reference current according to a magnitude of a voltage output from the power amplifier.
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