Method and apparatus for improving the efficiency

专利名称：Method and apparatus for improving the

efficiency of power amplifiers, operatingunder a large peak-to-average ratio

发明人：Israel Bar-David申请号：US09815196申请日：20010322公开号：US092867B2公开日：20021210

专利附图：

摘要：Method and apparatus for improving the efficiency and the dynamic range of apower amplifier operated with signals having a large peak-to-average ratio. A reference

level is determined, above which at least a portion of the magnitude of an input signalbeing a modulated signal that is input to the power amplifier, or a baseband waveformthat is used to generate the modulated signal, is defined as an excess input signal. Themagnitude of the input signal is continuously sampled, for detecting an excess inputsignal. A lower level of operating voltage is supplied to the power amplifier, if no excessinput signal is detected. The lower level of operating voltage is sufficient to effectivelyamplify input signals having a magnitude below the reference level. A higher level ofoperating voltage is supplied to the power amplifier, whenever an excess input signal isdetected. The higher level of operating voltage is sufficient to effectively amplify inputsignals having a magnitude above the reference level.

申请人：PARAGON COMMUNICATIONS LTD.

代理机构：BakerBotts, LLP

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