| 摘要 |
A power amplifier arrangement comprising: a power amplifier, said power amplifier having at least a first mode of operation and a second mode of operation, said power amplifier having an input to receive a digitally modulated input signal to be amplified, said modulated input signal being modulated by a constant envelope or a non constant envelope modulation method; and a control signal input, said control signal being arranged to control the mode of operation of the power amplifier; and control signal means for providing said control signal, said control signal means receiving a control signal input indicative of the modulation of said amplifier input signal and providing the control signal in dependence on the modulation of said amplifier input signal.
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