A Dual-Phase Center-Aligned 7-Bit Digital Pulsewidth Modulator for Polar Transmitters

Chien Hung Kuo, Jian Tzu Yeh, Jau Horng Chen*, Yi Jan Emery Chen*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

2 引文 斯高帕斯(Scopus)

摘要

This article presents a dual-phase center-aligned 7-bit digital pulsewidth modulator for the envelope modulation of pulse-modulated polar transmitters (PMPTs). The digital pulsewidth modulator operates at a clock frequency and delivers the modulation frequency of 100 MHz. A delay-locked loop (DLL) consisting of 128 delay cells is used to generate the pulse edges for synthesis of center-aligned pulsewidth modulation (PWM) waveforms. The pulsewidth resolution is 78.1 ps. The measurement results show that the integral nonlinearity (INL) and differential nonlinearity (DNL) of the output pulses are within ±0.4 and ±0.3 LSB, respectively, in the duty cycle range of 2.12%-96.51%. Tested with a 20-MHz 256-quadrature-amplitude modulation (QAM) 5G new radio (NR) signal, the transmitter signal using the output of the modulator achieves the adjacent channel leakage ratio (ACLR) of -33.8 dBc.

原文英語
頁(從 - 到)5205-5212
頁數8
期刊IEEE Transactions on Microwave Theory and Techniques
70
發行號11
DOIs
出版狀態已發佈 - 2022 11月 1

ASJC Scopus subject areas

  • 輻射
  • 凝聚態物理學
  • 電氣與電子工程

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