Chang-Jung Juan

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As magnetic recording density grows, the nonlinear distortions, known as transition shift and partial erasure,arise and limit the performance of the detector. In designing a detector, a phase detector is required to estimate the timing error in a timing recovery loop; the Muller & Mueller's phase detector is often adopted for its simple realization.(More)
Nonlinear effects arise in the high-density magnetic recording, which causes a performance degradation of the corresponding detector. Design of the timing recovery is crucial for the detector, and it becomes complicated in the presence of the nonlinear effects. In this article, we examine the effects of the Muller & Mueller's phase detector for a(More)
The realization of a digital phase-locked loop (DPLL) requires to choose a suitable phase detector and to design an appropriate loop filter; these tasks are commonly nontrivial in most applications. In this paper, the phase detector is examined, and a simple model is given to describe the characteristics of the timing function. The DPLL system is then(More)
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