A system for detecting current in an output stage of power amplifier
circuitry in a transmitter of a mobile terminal is provided. In general,
the mobile terminal includes power amplifier circuitry, power control
circuitry, current detection circuitry, and an inductor that essentially
prevents radio frequency coupling between the power control circuitry and
the power amplifier circuitry. Based on a voltage across the inductor,
the current detection circuitry generates a voltage detection signal
indicative of a current in the inductor and thus the current in an output
stage of the power amplifier.