A Watt-Class Digital Transmitter with a Voltage-Mode Class-S Power Amplifier and an Envelope Delta-Sigma Modulator for 450 MHz Band

2012 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS) Pub Date : 2012-10-25 DOI:10.1109/CSICS.2012.6340086

S. Hori, A. Wentzel, M. Hayakawa, W. Heinrich, K. Kunihiro

引用次数: 10

Abstract

A single-bit high efficiency watt-class digital transmitter for the 450 MHz band is presented, using a GaN voltage-mode class-S power amplifier and a CMOS envelope ΔΣ modulator. The transmitter achieves 1.1 W output power with 69% drain efficiency for a 400 MHz WCDMA uplink signal, thus meeting the 3GPP specifications for ACLR. A power control from 0.45 W to 1.8 W is achieved by changing the supply voltage of the power amplifier from 20 V to 40 V, keeping the drain efficiency beyond 58% without any degradation of ACLR.

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瓦特级数字发射机，具有电压模式s类功率放大器和450 MHz频段的包络Delta-Sigma调制器

采用GaN电压模式s类功率放大器和CMOS包络ΔΣ调制器，设计了一种用于450 MHz频段的高效率单比特瓦特级数字发射机。在400 MHz WCDMA上行信号下，发射机输出功率为1.1 W，漏极效率为69%，满足3GPP ACLR规范。通过将功率放大器的供电电压从20 V改变为40 V，实现了从0.45 W到1.8 W的功率控制，使漏极效率保持在58%以上，而ACLR没有任何下降。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2012 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS)

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