Design trade-offs in signal component separators for outphasing power amplifiers

Zhipeng Li, Yan Li, Y. Avniel, A. Megretski, V. Stojanović
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引用次数: 3

Abstract

Implementation design space of piece-wise linear outphasing signal component separator is explored by utilizing the changes in micro-architecture, choice of storage elements and aggressive back-end leakage power optimization techniques. With combination of these techniques, ~2× energy and area savings are achieved, resulting in record energy-efficiency of 32pJ/sample for asymmetric multilevel outphasing and 22pJ/sample for linear amplification with nonlinear components, at throughput of 400MSample/s and areas of 0.2-0.4mm2 in 45nm SOI process.
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设计失相功率放大器信号分量分离器的权衡
利用微结构的变化、存储元件的选择和积极的后端泄漏功率优化技术,探索了分段式线性除相信号分量分离器的实现设计空间。通过这些技术的结合,实现了约2倍的能量和面积节约,在45纳米SOI工艺中,在吞吐量为400MSample/s,面积为0.2-0.4mm2的情况下,非对称多电平失相的能量效率为32pJ/样品,非线性元件线性放大的能量效率为22pJ/样品。
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