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时钟模块自动修调电路设计

更新时间:2020-10-26 12:14:28 大小:561K 上传用户:gsy幸运查看TA发布的资源 标签:时钟模块 下载积分:2分 评价赚积分 (如何评价?) 收藏 评论(0) 举报

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由于实际生产过程中的工艺偏差,时钟模块输出的实际频率和设计频率相差比较大,因此在测试阶段,需要对输出频率不在目标范围内的时钟模块进行修调。基于二分法相对遍历法具有快速收敛的特点,设计自动修调电路并分析了异步脉冲同步带来的修调误差。自动修调电路通过ATE(Automatic Test Equipment)提供的慢速脉冲对时钟模块输出的时钟计数,用二分法自动改变trim值,从而达到快速修调的目的,节省了测试时间。

Due to the influence of the process, actual frequency of clock generator module always has some deviations from target,it is necessary to trim the clock module whose frequency is not as it was expected. Compared with traversing method, dichotomy has higher convergence rate. Auto trim circuit was designed based on dichotomy, and measurement error caused by synchronous of referenced pulse was analyzed. Auto trim circuit counted output of clock generator module during high level of referenced slow pulse which was generated by automatic test equipment, and trim value was changed using dichotomy, achieving the purpose of saving measure time.

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时钟模块自动修调电路设计.pdf 561K

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