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一种高速低抖动四相位时钟电路的设计

更新时间:2020-10-27 21:19:54 大小:3M 上传用户:zhengdai查看TA发布的资源 标签:时钟电路 下载积分:1分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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超高速A/D转换器对精准的时钟电路提出严格要求,时钟抖动是影响其精度的重要因素。文章在分析时钟抖动对A/D转换器的影响后,介绍了一种适用于GHz的低抖动四相位时钟电路。电路采用时钟恢复电路、四相位分布网络和相位校正电路,得到占空比稳定、相位误差小的四相位时钟。采用0.18μmCMOS工艺实现,电路仿真表明,四相位输出时钟抖动102fs,占空比调整范围30%~70%,功耗277 mW@1.8V。

Ultra-high speed A/D converters require accurate clock circuits.Timing jitter is one of the critical factors which affect the precision of the A/D converter.By analyzing the effect of clock jitter on the A/D converters,a GHz low-jitter four phase clock was demonstrated.The clock recovery circuits,distributed four phase network and phase adjustment circuits were used to obtain four phase clock with stable duty cycle and small phase error.The circuit was implemented in 0.18μm CMOS technology.Simulation shows that the circuit can achieve 102 fs timing jitter and 30%-70%correction range with a power consumption of 277 mW at 1.8 V.

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一种高速低抖动四相位时钟电路的设计.pdf 3M

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