Crest factor reduction applied to shaping table to increase power amplifier efficency of envelope tracking amplifier

  • Inventors:
  • Assignees: Nujira Ltd
  • Publication Date: February 29, 2012
  • Publication Number: GB-201200628-D0

Abstract

There is disclosed a method of controlling an input to an envelope modulated power supply of an envelope tracking amplification stage, comprising: generating an envelope signal representing the envelope of a signal to be amplified; applying a shaping function to the envelope signal to generate a shaped envelope signal, including: clipping the shaped envelope signal at high input envelope values; and providing the shaped envelope signal as an input signal to the envelope modulated power supply.

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