北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2014, Vol. 37 ›› Issue (4): 69-73.doi: 10.13190/j.jbupt.2014.04.015

• 研究报告 • 上一篇    下一篇

一种用于高速D/A转换器的1.6 Gbit·s-1同步电路

刘马良1, 朱樟明1, 丁昊宇1, 杨银堂1, 罗泽勇2   

  1. 1. 西安电子科技大学 微电子学院, 西安 710071;
    2. 中国科学院 长春光学机械与物理研究所, 长春 130033
  • 收稿日期:2013-11-13 出版日期:2014-08-28 发布日期:2014-08-09
  • 作者简介:刘马良(1985-),男,博士研究生,E-mail:liumalianghy@163.com;朱樟明(1978-),男,教授,博士生导师.
  • 基金资助:

    国家自然科学基金项目(61234002,61322405,61306044,61376033)

1.6 Gbit/s Synchronization Circuit for High Speed Digital-to-Analog Converters

LIU Ma-liang1, ZHU Zhang-ming1, DING Hao-yu1, YANG Yin-tang1, LUO Ze-yong2   

  1. 1. School of Microelectronics, Xidian University, Xi'an 710071, China;
    2. Changchun Institute of Optics Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • Received:2013-11-13 Online:2014-08-28 Published:2014-08-09

摘要:

针对GHz采样的D/A转换器(DAC)设计及系统要求,提出了一种新型的高速同步电路. 该同步电路引入高速动态比较器和触发器做低电压差分信号(LVDS)的数据接收电路,降低了功耗,实现简单;然后利用低抖动模拟延迟锁相环和数字相位检测电路选择准确的同步时钟信号,提高了同步电路工作频率范围. 基于SMIC 0.18 μm 1.8 V CMOS工艺的仿真和测试结果显示,同步电路工作的时钟频率范围覆盖250~800 MHz,支持的数据率从500 Mbit·s-1~1.6 Gbit·s-1,能用于GHz采样频率的DAC核和外部LVDS发送器接口数据的同步.

关键词: 同步, 低电压差分信号, D/A转换器, 延迟锁相环

Abstract:

A new synchronization circuit was proposed. Due to requirement of the GHz sampling D/A converter, the circuit employs high-speed dynamic comparators and flip-flops to receive the input data from the low voltage differential signaling (LVDS) interface, which has the advantage of low power and low complexity. At the same time, this circuit adopts a low jitter analog delay locked loop and digital phase detector to obtain the proper synchronous clock, thereby, the clock frequency range of the synchronous circuit can be improved. Based upon the SMIC 0.18 um 1.8 V CMOS process, the simulation gives that the clock frequency of the synchronization circuit is within the range of 250~800 MHz, and the data rate is 500 Mbps~1.6 Gbps. The circuit can be used in the synchronization of the GHz sampling DAC core and the external LVDS transmitter interface.

Key words: synchronization, LVDS, DAC, delay locked loop

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