A quadrature digital power amplifier system comprising: a decomposition circuit comprising: an input configured to receive an IQ data signal comprising an I data signal and a Q data signal; and a first suboutput and a second suboutput, wherein the decomposition circuit is configured to decompose the IQ data signal into at least a first IQ data subsignal and a second IQ data subsignal, and to output the first IQ data subsignal on the first suboutput and the second IQ data subsignal on the second suboutput; a first digital-to-RF converter device comprising a first converter input connected to the first suboutput of the decomposition circuit, a first digital power amplifier connected to the first converter input, and a first output, wherein the first digital-to-RF converter device is configured to convert the first IQ data subsignal to a first RF signal and to output the first RF signal on the first output; at least a second digital-to-RF converter device comprising a second converter input connected to the second suboutput of the decomposition circuit, a second digital power amplifier connected to the second converter input, and a second output, wherein the second digital-to-RF converter device is configured to convert the second IQ data subsignal to a second RF signal and to output the second RF signal on the second output characterized in that the decomposition circuit is configured to decompose the IQ data signal into at least a first IQ data subsignal not comprising signal components above a first threshold level in the IQ data signal and a second IQ data subsignal comprising said signal components if the signal level of the IQ data signal in a given sample is above the first threshold level. a decomposition circuit comprising: an input configured to receive an IQ data signal comprising an I data signal and a Q data signal; and a first suboutput and a second suboutput, wherein the decomposition circuit is configured to decompose the IQ data signal into at least a first IQ data subsignal and a second IQ data subsignal, and to output the first IQ data subsignal on the first suboutput and the second IQ data subsignal on the second suboutput; an input configured to receive an IQ data signal comprising an I data signal and a Q data signal; and a first suboutput and a second suboutput, wherein the decomposition circuit is configured to decompose the IQ data signal into at least a first IQ data subsignal and a second IQ data subsignal, and to output the first IQ data subsignal on the first suboutput and the second IQ data subsignal on the second suboutput; a first digital-to-RF converter device comprising a first converter input connected to the first suboutput of the decomposition circuit, a first digital power amplifier connected to the first converter input, and a first output, wherein the first digital-to-RF converter device is configured to convert the first IQ data subsignal to a first RF signal and to output the first RF signal on the first output; at least a second digital-to-RF converter device comprising a second converter input connected to the second suboutput of the decomposition circuit, a second digital power amplifier connected to the second converter input, and a second output, wherein the second digital-to-RF converter device is configured to convert the second IQ data subsignal to a second RF signal and to output the second RF signal on the second output characterized in that the decomposition circuit is configured to decompose the IQ data signal into at least a first IQ data subsignal not comprising signal components above a first threshold level in the IQ data signal and a second IQ data subsignal comprising said signal components if the signal level of the IQ data signal in a given sample is above the first threshold level.