Anordning och metod för pulsformning och effektförstärkning

摘要

The present invention relates to arrangements and methods for radio frequency modulation and power amplification of an information signal (XIF). Modulation and amplification of the information signal (XIF) is carried out with very high linearity and efficiency over a wide frequency band by sigma-delta modulating (410) said information signal (XIF), whereby a digital signal (Y) is generated. The digital signal (Y) is up-mixed and voltage switched (420) by voltage-fed switches (423) controlled by the up-mixed digital signal (RF). Said switches are preferably conductive elements whose electric conductivity depend on the amount of ionising radiation that falls on the elements.