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Mobile wireless communications device including sensing transistor and hysteretic comparator and related methods

  • US 8,494,468 B1
  • Filed: 01/27/2012
  • Issued: 07/23/2013
  • Est. Priority Date: 01/27/2012
  • Status: Active Grant
First Claim
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1. A mobile wireless communications device comprising:

  • a portable housing;

    a supply modulator carried by said portable housing and comprisingan output node,a linear amplifier coupled to said output node, anda switching amplifier also coupled to said output node and comprisingat least one sensing transistor configured to sense current output from said linear amplifier and generate a drive voltage, anda hysteretic comparator coupled to said at least one sensing transistor and configured to be driven by the drive voltage;

    a radio frequency (RF) power amplifier coupled to said output node of said supply modulator; and

    a wireless transceiver carried by said portable housing and coupled to said RF power amplifier.

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