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Matching circuit including a MEMS capacitor

  • US 6,670,864 B2
  • Filed: 06/27/2001
  • Issued: 12/30/2003
  • Est. Priority Date: 06/27/2000
  • Status: Expired due to Term
First Claim
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1. A matching circuit for adapting a radio-frequency amplifier to load impedance at various output power levels of the radio-frequency amplifier, the matching circuit being common for all power levels and the matching circuit comprising an interface for receiving power level control signals which determine capacitance of one or more capacitors, andat least one matching circuit capacitor is a microelectromechanical (MEMS) capacitor whose capacitance the power level control signals adjust for the radio-frequency amplifier to operate optimally at a selected frequency at any particular power level and thus making the radio-frequency amplifier operate optimally in the whole desired power range.

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