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Waste energy control and management in power amplifiers

  • US 5,842,140 A
  • Filed: 10/09/1996
  • Issued: 11/24/1998
  • Est. Priority Date: 01/11/1994
  • Status: Expired due to Term
First Claim
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1. An efficient transmitter for transmitting a plurality of signals, comprising:

  • a direct current power source;

    at least one pair of power amplifiers for receiving power from said direct current power source, wherein a first amplifier in said pair is adapted to amplify a first signal and a second amplifier in said pair is adapted to amplify a second signal, wherein an amplification factor of said first amplifier is at least twice as great as a factor needed to amplify said first signal to a level appropriate for transmission, and wherein an amplification factor of said second amplifier is at least twice as great as a factor needed to amplify said second signal to a level appropriate for transmission;

    a power combining means for combining outputs of said pair of power amplifiers to produce a desired sum signal for transmission and a waste energy signal; and

    a rectifier circuit for converting the waste energy signal into a direct current which is fed back to said direct current power source in order to reduce net power consumption of said transmitter.

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