Design Considerations for a Direct Digitally Modulated WLAN Transmitter With Integrated Phase Path and Dynamic Impedance Modulation

被引：82
作者：
Ye, Lu [1 ]
Chen, Jiashu [1 ]
Kong, Lingkai [1 ]
Alon, Elad [1 ]
Niknejad, Ali M. [1 ]
机构：
[1] Univ Calif Berkeley, Berkeley Wireless Res Ctr, Berkeley, CA 94704 USA
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2013年 / 48卷 / 12期
关键词：
Digital amplitude modulation; efficiency enhancement; impedance modulation; filter; phase interpolator; phase modulator; power amplifier (PA); polar transmitter (TX); predistortion; transformer; WLAN; CMOS POWER-AMPLIFIER; NM CMOS; TRANSFORMER; 2.4-GHZ; BAND;
D O I：
10.1109/JSSC.2013.2281142
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A 65-nm digitally modulated polar TX for WLAN 802.11g is fully integrated along with baseband digital filtering. The TX employs dynamic impedance modulation to improve efficiency at back-off powers. High-bandwidth phase modulation is achieved efficiently with an open-loop architecture. Operating from 1.2-V/1-V supplies, the TX delivers 16.8 dBm average power at -28-dB EVM with 24.5% drain efficiency, 22% PAE, 19.3% system efficiency, and 247-mW power consumption including the entire on-chip TX chain; the noise floor is -125 dBm/Hz at 200-MHz offset without external filtering.
引用
收藏
页码：3160 / 3177
页数：18
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