In this paper, Part 3 of our three-part series on 3G/4G multimode handsets, the authors will examine the fundamental challenges engineers face when designing front ends to be multi-band and multistandard across different modulations.
Key Concepts Discussed:
• Power amplifier background.
• Low Power Mode versus DC-DC converters: impact on battery current.
• Quadrature versus single-ended architectures.
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