Patent ID: 8319557

Claim:
A mobile wireless telecommunication device, comprising: an antenna; a radio frequency (RF) receiver system coupled to the antenna; an RF transmitter system; a baseband subsystem coupled to the RF transmitter system and the RF receiver system; and a power amplifier system having an input coupled to an output of the RF transmitter system and an output coupled to the antenna, the power amplifier system including a balanced power amplifier and a power detector, the balanced power amplifier having an in-phase power amplifier portion and an out-of-phase power amplifier portion, the power detector including an in-phase replica circuit replicating amplifying circuitry of the in-phase power amplifier portion coupled to an in-phase current mirror, the power detector providing an indication of current in the balanced power amplifier to the baseband subsystem in response to a combination indicative of current in the in-phase power amplifier portion and current in the out-of-phase power amplifier portion, the combination generated based on an output of the in-phase current mirror coupled to the in-phase power amplifier portion via the in-phase replica circuit and an output of an out-of-phase current mirror coupled to the out-of-phase power amplifier portion.