Stacked PA power control

  • US 9,960,737 B1
  • Filed: 03/06/2017
  • Issued: 05/01/2018
  • Est. Priority Date: 03/06/2017
  • Status: Active Grant
First Claim
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1. A circuital arrangement comprising:

  • a stack of a plurality of transistors arranged in a cascode configuration, comprising;

    (i) an input transistor adapted to receive an input radio frequency (RF) signal; and

    (ii) one or more cascoded transistors, the one or more cascoded transistors comprising an output transistor adapted to output, at an adjustable output power, an output RF signal based on the input RF signal;

    a first resistor tree comprising a plurality of series connected resistors; and

    a low dropout (LDO) regulator coupled to the first resistor tree,wherein;

    the adjustable output power is controlled by varying at least one gate voltage of the one or more cascoded transistors of the stack,a node of the first resistor tree is configured to provide the at least one gate voltage, anda control voltage to the LDO regulator varies the at least one gate voltage to provide the adjustable output power from the stack.

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