Arrangement and method relating to signal power amplification

Details Arrangement and method relating to signal power amplification Arrangement and method relating to signal power amplification

1998-04-17

1999-12-07

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including gain control means

330129, 330285, H03G 310, H03G 320

Patent

active

059990570

ABSTRACT:
The power of an input signal is amplified and the power-amplified input signal forms an output signal whose power shall be in agreement with a reference level. The power of the signal is amplified with a power amplification circuit that includes a power amplifier and a control unit. The power amplification circuit also measures the power of the output signal. The control unit generates supply voltages for the transistors of the power amplifier in relation to said reference level, so as to obtain an efficient power amplifier. The control unit regulates the power of the output signal in relation to the reference level and in relation to the power of the output signal, so that the power of the output signal will be in general agreement with said reference level. The power amplifier also includes controllable matching circuits that are controlled by controlled signals generated in relation to said reference level, so as to further improve the efficiency of the power amplifier.

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