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MOBILE COMMUNICATIONS DEVICE INCLUDING AN RF TRANSMITTER PROVIDING IMPEDANCE FLUCTUATION DAMPENING AND RELATED METHODS

  • US 20130324060A1
  • Filed: 05/31/2012
  • Published: 12/05/2013
  • Est. Priority Date: 05/31/2012
  • Status: Active Grant
First Claim
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1. A mobile communications device comprising:

  • a radio frequency (RF) signal source configured to generate RF signals over at least one RF frequency band;

    an RF transmitter coupled to said RF signal source and comprisingan RF amplifier configured to operate over a plurality of different power control levels, said RF amplifier having an input configured to receive the RF signals from said signal source and an output having an impedance which changes based upon changes between the different power control levels, andat least one shunt resistor coupling the output of said amplifier to a voltage reference, said at least one shunt resistor configured to decrease a highest impedance change of the RF amplifier output to below a threshold impedance level; and

    at least one antenna coupled to the output of said RF amplifier and configured to operate over the at least one RF frequency band.

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