Impedance matching circuit with tunable notch filters for power amplifier

A method comprising:

• amplifying an input radio frequency (RF) signal with a power amplifier to obtain an amplified RF signal;
• impedance matching the power amplifier with an impedance matching circuit comprising at least one tunable notch filter dynamically adjusted during operation in response to a change in operating band of the input RF signal to attenuate at least one undesired signal in the amplified RF signal;
• and
• attenuating the at least one undesired signal in the amplified RF signal with the at least one tunable notch filter.

An apparatus comprising:

• means for amplifying an input radio frequency (RF) signal to obtain an amplified RF signal;
• means for impedance matching the means for amplifying, the means for amplifying comprising at least one tunable notch dynamically adjusted during operation in response to a change in operating band of the input RF signal to attenuate at least one undesired signal in the amplified RF signal;
• and
• means for attenuating the at least one undesired signal in the amplified RF signal with the at least one tunable notch.