KEY POWER AMPLIFIER Russian patent published in 2010 - IPC H03F3/217 H03F3/68 

FIELD: electricity.

SUBSTANCE: key power amplifier, comprising pulse-width modulator and output filter. Additionally it includes high-frequency coupler, two-cycle output cascade with number of amplifying elements equal to 2N at N≥2, determined by requirement to linearity coefficient of amplifier amplification, and summator, besides output of pulse-width modulator is connected to input of high-frequency coupler, 2N outputs of which are connected to inputs of 2N amplifying elements of two-cycle output cascade, 2N outputs of which are connected to 2N inputs of summator, output of which is connected to input of output filter.

EFFECT: provision of specified linearity ratio of key power amplifier.

3 dwg