摘要： 针对传统的由锁相环构成的伺服时钟恢复电路噪声干扰大、锁定时间长的问题，在线性插值时钟恢复的基础上进行改进，提出基于τ因子的内插时钟模型，并推导出τ因子内插滤波器系数算法，设计内插滤波器的FPGA实现方案并进行仿真。实验结果证明，采用τ因子内插滤波器可以获得更好的谐波频谱，解决了传统硬盘伺服时钟恢复电路的噪声问题。

关键词: 内插滤波器, 滤波系数算法, τ因子, 谐波频谱

Abstract: This paper proposes an interpolation timing recovery model based on τ factor on the basis of improvement in linear interpolation clock recovery model, because traditional servo phase-locked loop timing recovery circuit has the problem of noise interference and long time lock. It conducts the algorithm of interpolator coefficient based on τ factor, researches and simulates the implementation of interpolator by FPGA. Experimental results show that the interpolated timing recovery model based on τ factor can obtain better harmonic frequency and solves the noise problem of traditional harddisk servo timing recovery circuit.

Key words: interpolator, algorithm of interpolation coefficient, τ factor, harmonic frequency

中图分类号: 

• TP391