POWER AMPLIFIER WITH SELECTABLE LOAD IMPEDANCE AND METHOD OF AMPLIFYING A SIGNAL WITH SELECTABLE LOAD IMPEDANCE
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United States of America Patent
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N/A
Issued Date -
Jan 19, 2012
app pub date -
Jul 14, 2010
filing date -
Jul 14, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device includes: a power amplifier, including a supply voltage terminal, an input port and an output port, and the power amplifier being configured to receive a supply voltage at the supply voltage terminal, an input signal through the input port, to amplify the received input signal, and to output an amplified output signal through the output port; a variable impedance matching circuit having an input terminal connected to the output port of the power amplifier, and having an output terminal for being connected to a load; and a controller including a voltage measuring unit configured to measure the supply voltage, to compare the measured supply voltage with a threshold voltage, and to control the variable impedance matching circuit based on a result of the comparison so as to adjust a load impedance seen by the power amplifier at its output port.
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