| 数字电视调谐器中锁相环锁定时间的计算 |
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| 引用本文： | 吴秀龙,吉新春,吴建辉.数字电视调谐器中锁相环锁定时间的计算[J].微电子学,2010,40(2). |
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| 作者姓名： | 吴秀龙 吉新春 吴建辉 |
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| 作者单位： | 1. 东南大学,国家专用集成电路系统工程技术研究中心,南京,210096;安徽大学,电子科学与技术学院,合肥,230039
2. 东南大学,国家专用集成电路系统工程技术研究中心,南京,210096 |
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| 基金项目： | 国家高技术发展研究(863)计划基金资助项目(2007AA01Z280);;中国博士后科学基金资助项目(20090450071) |
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| 摘 要： | 对数字有线电视调谐器中带有源滤波器结构的锁相环进行分析,深入研究了锁定时间与环路参数的关系,在推导环路相位误差的基础上,提出了一种计算环路锁定时间的方法,并给出具体的计算公式。计算结果与仿真/测试结果比较吻合,说明得到的公式能准确计算出锁定时间,而且可以直观地反映锁定时间与环路参数之间的关系。
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| 关 键 词： | 数字调谐器 锁相环 锁定时间 相位误差 |
Calculation Method for Locking Time of PLL in DTV Tuner |
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| WU Xiulong,JI Xinchun,WU Jianhui.Calculation Method for Locking Time of PLL in DTV Tuner[J].Microelectronics,2010,40(2). |
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| Authors: | WU Xiulong JI Xinchun WU Jianhui |
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| Institution: | 1/a>;2;1.National ASIC System Engineering Research Center/a>;Southeast University/a>;Nanjing 210096/a>;P.R.China/a>;2.School of Electronic Science and Technology/a>;Anhui University/a>;Hefei 230039/a>;P.R.China |
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| Abstract: | PLL with active filter for DTV tuner was analyzed.The relationship between locking time and loop parameters was discussed.A method for calculating locking time was presented based on derivation of phase error. Calculated results were in good agreement with simulated and test results.With formulas derived,which directly reflect the relationship between locking time and loop parameters,locking time can be accurately worked out, |
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| Keywords: | DTV tuner PLL Locking time Phase error |
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