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Digital amplitude modulation transmitter with pulse width modulating RF drive

  • US 7,369,819 B2
  • Filed: 04/14/2005
  • Issued: 05/06/2008
  • Est. Priority Date: 04/14/2005
  • Status: Active Grant
First Claim
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1. A digital amplitude modulation (AM) transmitter with pulse width modulating RF drive, comprising:

  • a plurality of RE amplifiers, each when turned on amplifying an applied RF drive signal by the same amount to provide a unit step RF output pulse of a fixed magnitude;

    an encoder for supplying turn-on signals to turn on a number of said RF amplifiers wherein said number varies as a function of the value of an applied audio signal; and

    pulse width driver means to vary the pulse width of each said unit step RF output pulse as a function of the number of said RF amplifiers that are turned on.

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