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Ultra compact multi-band transmitted with robust AM-PM distortion self-suppression techniques

  • US 10,381,986 B2
  • Filed: 01/23/2018
  • Issued: 08/13/2019
  • Est. Priority Date: 03/11/2016
  • Status: Active Grant
First Claim
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1. An apparatus of a mobile device for amplifying radio frequency signals, comprising:

  • a plurality of n-bit binary weighted differential amplifier cells coupled to an output passive network, wherein an n-bit binary weighted differential amplifier cell of the plurality of n-bit binary weighted differential amplifier cells comprises a pair of amplification transistors and a pair of cascode transistors, wherein the pair of amplification transistors comprise a smaller gate width than the pair of cascode transistors;

    the output passive network comprising a transformer and a plurality of capacitive units coupled in parallel with one another; and

    a processing circuitry configured to power on or off the at least one of the pair of cascode transistors based on an amplification setting or a voltage threshold.

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