Wireless communications device including power detector circuit coupled to sample signal at interior node of amplifier

A wireless communications device, comprising:

• a processor;
• an antenna;
• a signal path between the processor and the antenna;
• an amplifier comprising a plurality of amplifier stages in the signal path between the processor and the antenna, said amplifier including a plurality of interior nodes in the signal path between, and exclusive of, an input node of the amplifier that receives a first signal on the signal path and an output node of the amplifier from which the first signal goes to the antenna;
• a power detector circuit comprising a plurality of inputs and an output, wherein each of the plurality of inputs is coupled to a separate one of the interior nodes, the power detector is operable to detect the first signal at each of the plurality of interior nodes, and the power detector is operable to output a second signal that reflects the first signal at the detected plurality of interior nodes, and
• wherein the processor is operable to adjust an amplitude of the first signal in response to the second signal.