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In this work, an effective linearization technique to linearize both AM-PM and AM-AM distortions in CMOS envelope tracking (ET) transmitter is developed using dual shaping tables. AM-AM response is linearized using iso-gain shaping table. A variable phase shifter is integrated with the RF power amplifier (RF PA), which linearizes AM-PM response of CMOS ET PA in conjunction with the iso-gain shaping...
This letter analyzes the performance of RF carrier phase-burst transmitters, implemented with a single-ended switched-mode power amplifier. Using a practical prototype and its corresponding theoretical operation model, the efficiency and linearity was measured and discussed for different envelope modulators. This theoretical analysis and its experimental validation led to the conclusion that optimized...
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