Integrated tunable high efficiency power amplifier

  • US 6,232,841 B1
  • Filed: 07/01/1999
  • Issued: 05/15/2001
  • Est. Priority Date: 07/01/1999
  • Status: Expired due to Term
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First Claim
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1. A tunable high efficiency power amplifier, comprising:

  • an active device connected to receive an RF input signal at a control input and having a current circuit which is switched between conductive and non-conductive states in accordance with said RF input signal, and a network of reactive devices connected to said current circuit, said active device and said network forming a power amplifier arranged to amplify said RF input signal over a range of input signal frequencies determined by the values of said reactive devices, said reactive devices comprising;

    at least one inductance, and at least one capacitance, at least one of said at least one inductance and at least one of said at least one capacitance being tunable reactive devices, each of which comprises at least one micro-electromechanical (MEM) device that operates in response to a respective control signal and that varies its respective tunable reactive device'"'"'s reactance value in accordance with said control signal such that said range of input signal frequencies over which said amplifier is operational is varied in accordance with said control signals, thereby enabling said amplifier to operate efficiently over a wider range of input frequencies.

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