ANALYSIS OF SHOOT-THROUGH CURRENT OF SUPPLY MODULATOR FOR ENVELOPE-TRACKING TECHNIQUES

초록

In this work, we analyze the conduction and switching losses of a supply modulator for envelope-tracking techniques. In particular, the conduction and switching losses in the class-D chain of the supply modulator are calculated to enhance the efficiency of the supply modulator. From the calculated results, the number of stages and fan-out in the multiple stages of the class-D chain are optimized. To verify the feasibility of the analyzed results, we designed a supply modulator using a 180-nm RF CMOS process. From the measured results, we successfully prove the feasibility of the analyzed results. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1579-1983, 2015

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