...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Journal of Solid-State Circuits >A Wideband Four-Way Doherty Bits-In RF-Out CMOS Transmitter
【24h】

A Wideband Four-Way Doherty Bits-In RF-Out CMOS Transmitter

机译：A Wideband Four-Way Doherty Bits-In RF-Out CMOS Transmitter

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

We present a wideband, 12-bit four-way Doherty Cartesian digital transmitter (DTX) featuring an innovative 50%-LO signed $I/Q$ interleaved up-conversion technique that enables close to perfect orthogonal $I/Q$ summation. The DTX incorporates a compact four-way lumped-element Doherty power combining network to enhance its average efficiency at deep power back-off (DPBO). It comprises a signed second-order hold (SOH) interpolation filter to suppress the sampling spectral replicas significantly. The proposed DTX is realized in a 40-nm bulk CMOS and delivers a peak output power of 27.54 dBm with drain and system efficiencies of 46.35% and 30.77%, respectively, at 5.3 GHz. At 12 dB DPBO, the realized DTX demonstrates a drain efficiency (DE) of 41.74%–39.27% in a 5.2–5.5 GHz band, respectively. Its intrinsic $I/Q$ image, LO leakage, and C-IMD3/ $H_{{mathrm {3BB}}}$ for a 200 MHz tone spacing over a 4.8–6.2 GHz band are ?64, ?65, and ?69 dBc, respectively, without calibration. Applying a simple memoryless $2,,times ,,1$ -D digital pre-distortion, its error vector magnitude and adjacent channel leakage ratio are lower than ?31 dB and ?39 dBc, respectively, for a six-carrier “40 MHz 256-QAM OFDM” signal with 18 dBm average output power and a 41% average DE. The signed SOH functionality is verified employing a four-carrier “80 MHz 512-QAM OFDM” signal with spectral purity of better than ?35 dBc, while its baseband sampling frequency is 675 MHz.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号