发明授权
US06816328B2 Pseudo-synchronous interpolated timing recovery for a sampled amplitude read channel 有权
采样振幅读通道的伪同步内插定时恢复

  • 专利标题: Pseudo-synchronous interpolated timing recovery for a sampled amplitude read channel
  • 专利标题(中): 采样振幅读通道的伪同步内插定时恢复
  • 申请号: US09882084
    申请日: 2001-06-13
  • 公开(公告)号: US06816328B2
    公开(公告)日: 2004-11-09
  • 发明人: James Wilson Rae
  • 申请人: James Wilson Rae
  • 主分类号: G11B509
  • IPC分类号: G11B509
Pseudo-synchronous interpolated timing recovery for a sampled amplitude read channel
摘要:
Systems and methods for reading information stored on a magnetic medium are described. Data symbols are generated from a signal encoded at a baud rate with data including an acquisition preamble defining an acquisition frequency and an acquisition phase. The system includes an inventive dual loop synchronizer that is optimized to improve the operating efficiency and reduce the overall latency of the read channel. In one aspect, the dual loop synchronizer includes a frequency synchronization loop, a signal sampler, an interpolator, and a phase synchronization loop. The frequency synchronization loop is configured to generate a sampling clock synchronized approximately to the acquisition frequency and the acquisition phase of the encoded data signal. The signal sampler is coupled to the frequency synchronization loop and is configured to sample the encoded data signal in response to the sampling clock to produce a plurality of data samples. The interpolator is coupled to the frequency synchronization loop and is configured to produce in response to the sampling clock interpolated samples from the data samples. The phase synchronization loop is coupled to the interpolator and is configured to synchronize the interpolator to the baud rate of the encoded data signal. In another aspect, the frequency synchronization loop includes a delay-locked loop configured to synthesize the sampling clock.
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