Method for operating, and a circuit arrangement for, an amplifier in a mobile terminal

摘要

The power amplifier (1) transmits signals (1.3) to a front-end (8) and an antenna (10), and when the antenna is mismatched, the signals are at least partially reflected (1.4). The transmitted and reflected signals are decoupled and demodulated (3.1 and 3.2) and the load impedance of the power amplifier is determined in terms of amplitude and phase. An independent claim is included for a power amplifier circuit.