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Amplitude modulation using digitally selected carrier amplifiers

  • US 4,580,111 A
  • Filed: 12/24/1981
  • Issued: 04/01/1986
  • Est. Priority Date: 12/24/1981
  • Status: Expired due to Term
First Claim
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1. Apparatus for generating an amplitude modulated carrier signal, comprising:

  • means responding to an input signal for providing a plurality of first carrier signals of like frequency and phase and equal amplitude where the number of said first carrier signals being provided is dependent upon amplitude of said input signal, and for also selectively providing at least one second carrier signal, each said at least one second carrier signal having an amplitude which is a fraction of the amplitude of each of said first carrier signals; and

    ,means for combining said first and said at least one second carrier signals so as to provide a combined carrier signal having an amplitude which is modulated in accordance with said amplitude of said input signal.

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