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AMPLIFICATION SYSTEM WITH DIFFERENTIAL ENVELOPE-BASED BIAS

  • US 20190123690A1
  • Filed: 12/15/2018
  • Published: 04/25/2019
  • Est. Priority Date: 05/17/2016
  • Status: Active Grant
First Claim
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1. An amplification system comprising:

  • a first differential amplifier configured to receive a differential envelope signal and to provide a first processed envelope signal;

    a second differential amplifier configured to receive the differential envelope signal and to provide a second processed envelope signal;

    an envelope tracker configured to receive the first processed envelope signal and to provide an envelope tracking signal; and

    a cascode amplifier having a first transistor and a second transistor configured to generate an output RF signal that is an amplified version of an input RF signal, the first transistor biased by a combination of a biasing signal and the input RF signal, the second transistor biased by the second processed envelope signal, the second transistor configured to receive an envelope-based supply voltage that is a combination of the envelope tracking signal and a supply voltage.

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