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Power amplifier with wide dynamic range am feedback linearization scheme

  • US 9,742,359 B2
  • Filed: 03/17/2014
  • Issued: 08/22/2017
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. Circuitry, comprising:

  • a radio frequency (RF) amplification circuit configured to amplify an RF signal in accordance with a gain of the RF amplification circuit so as to generate an amplified RF signal, wherein the RF amplification circuit comprises;

    an initial RF amplifier stage configured to receive the RF signal from a package interface and amplify the RF signal in accordance with a first amplifier stage gain so as to generate a first interstage RF signal;

    an intermediate RF amplifier stage configured to receive the first interstage RF signal from the initial RF amplifier stage and amplify the first interstage RF signal in accordance with a second amplifier stage gain so as to generate a second interstage RF signal; and

    a final RF amplifier stage configured to receive the second interstage RF signal from the intermediate RF amplifier stage and amplify the second interstage RF signal in accordance with a third amplifier stage gain so as to generate the amplified RF signal, wherein the gain of the RF amplification circuit is an aggregate of the first amplifier stage gain, the second amplifier stage gain, and the third amplifier stage gain;

    a closed-loop gain linearization circuit configured to;

    endogenously establish a target gain magnitude using the RF signal; and

    linearize the gain of the RF amplification circuit in accordance with the target gain magnitude by being configured to adjust a first gain magnitude of the second amplifier stage gain to set a gain magnitude of the gain of the RF amplification circuit, by being configured further to adjust a second gain magnitude of the third amplifier stage gain to set the gain magnitude of the gain of the RF amplification circuit in accordance with the target gain magnitude, by being configured to adjust the first gain magnitude of the second amplifier stage gain, and by being configured to adjust an internal impedance level of the intermediate RF amplifier stage to set the gain magnitude of the gain of the RF amplification circuit in accordance with the target gain magnitude; and

    the package interface configured to receive the RF signal and transmit the amplified RF signal.

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