Title
A High Resolution DPWM Based on Synchronous Phase-Shifted Circuit and Delay Line
Abstract
In this paper, a hybrid architecture of digital pulse width modulator (DPWM) with high resolution is proposed. Furthermore, to enhance linearity performance, the critical path is optimized by a novel synchronous phase-shifted circuit. A carry chain-based delay line is also utilized to improve time resolution. A 14-bit DPWM with the proposed architecture is implemented and tested by Altera Cyclone IV FPGA. The experiment results show that the DPWM achieves high linearity, where <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$R^{2}$ </tex-math></inline-formula> maintains over 0.9994. Besides, the output duty cycle covers a wide range from 0.9429% to 99.2% and the time resolution is about 41.3ps.
Year
DOI
Venue
2020
10.1109/TCSI.2020.2977146
IEEE Transactions on Circuits and Systems I: Regular Papers
Keywords
DocType
Volume
Clocks,Delays,Linearity,Computer architecture,Delay lines,Phase locked loops,Latches
Journal
67
Issue
ISSN
Citations 
8
1549-8328
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Xin Cheng117.17
Wanjing Shao200.34
Lixin Xu300.34
Yongqiang Zhang4439.06
Guangjun Xie587.32
Zhang Zhang658.09