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Overlay class F choke

  • US 9,030,256 B2
  • Filed: 09/07/2011
  • Issued: 05/12/2015
  • Est. Priority Date: 04/20/2010
  • Status: Active Grant
First Claim
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1. Circuitry comprising:

  • a radio frequency (RF) power amplifier (PA) amplifying transistor of an RF PA stage; and

    an overlay class F choke of the RF PA stage, such that the overlay class F choke comprises a pair of mutually coupled class F inductive elements coupled in series between a PA envelope power supply and a collector of the RF PA amplifying transistor, wherein the pair of mutually coupled class F inductive elements are overlaid, such that one of the pair of mutually coupled class F inductive elements is overlaid over another of the pair of mutually coupled class F inductive elements to provide the mutual coupling.

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