Delayed Switched Cascode Doherty Class-E PA

Nourhan Elsayed, Hani Saleh, Baker Mohammad, Mohammed Ismail, Mihai Sanduleanu

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


This chapter presents the first completely on-chip Doherty based Class-E PA in 22nm FDSOI. The PAs include a cascode topology for improved efficiency and a larger output power. To further improve the total PAE, the switching signal is applied to the input transistor of the Class-E PA as well as to the cascode transistor with a delay element that utilizes a tunable transmission line. The Doherty PA is preceded by an active balun that produces two 180 out-of-phase signals followed by a variable gain amplifier (VGA). To the best of our knowledge this is the first Doherty design with switched cascode Class-E amplifier. Section 5.1 discusses the switched mode Class-E DPA Design and architecture. Section 5.2 presents the implementation and measurement results. Finally, Sect. 5.3 concludes the chapter.

Original languageBritish English
Title of host publicationAnalog Circuits and Signal Processing
Number of pages14
StatePublished - 2022

Publication series

NameAnalog Circuits and Signal Processing
ISSN (Print)1872-082X
ISSN (Electronic)2197-1854


  • Active balun
  • Doherty class-E
  • High efficiency
  • Pulse injection
  • Variable gain amplifier


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