Patent ID: 7529526

Claim:
An apparatus for transmitting and receiving wireless signals, the apparatus comprising: an RF transmit path including a power amplifier configured to produce an amplified transmit signal at a power level; an RF receive path; an antenna switch operably connected to said RF transmit path, said RF receiver path, an antenna, and a switch driver, the antenna switch configured to switch the antenna between the RF receive path and the RF transmit path based on a control signal from said switch driver; a control line connected between said antenna switch and a switch driver; a power amplifier detector connected to said control line, the power amplifier detector configured to receive a leakage signal leaking from the antenna switch through said transmit control line, and measure a power level of the leakage signal, which is indicative of the power level of the amplified transmit signal when the antenna switch is connected to the RF transmit path; and a power amplifier controller connected to the power amplifier detector and the power amplifier, the power amplifier controller configured to adjust the power level of the power amplifier based on the leakage signal detected by the power amplifier detector.