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Linear amplifier control

  • US 5,386,198 A
  • Filed: 01/28/1993
  • Issued: 01/31/1995
  • Est. Priority Date: 01/28/1993
  • Status: Expired due to Term
First Claim
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1. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

  • a spread spectrum signal generating means for frequency spreading a control signal;

    a first combining means for combining an input signal and said frequency spreaded control signal;

    a first sampling means including an input port for receiving said combined signals from said first combining means and first and second output ports;

    an amplifying means coupled to said first output port of said first sampling means for amplifying said combined signal received from said first sampling means;

    a first delay element coupled to said second output port of said first signal sampling means for delaying said combined signal received from said first signal sampling means to produce a delayed combined signal;

    first amplitude and phase control means coupled to said first delay means for controlling the relative amplitude and phase of said delayed combined signal;

    a second combining means for combining said amplified signal from said amplifying means and an adjusted signal from said amplitude and phase control means to produce an output signal;

    a second sampling means including a first input port for receiving said output signal and first and second output ports;

    a remapping means coupled to said first output port of said second sampling means for remapping the output signal from said second sampling means with a spread sequence which has been delayed by a second delay means;

    a third delay means for receiving said control signals; and

    a matched filter correlator means for correlating said delayed output signal received from said third delay means and said remapped signal received from said remapping means for controlling the first amplitude and phase control means.

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