Data Recovery - Security White Papers
Wide Range PLL for EFM Data Recovery of 64X Speed CD-ROMs & 10X Speed DVD-ROMs
Overview This paper proposes a wide range Phase-Locked Loop (PLL) for 64X speed CD-ROMs and 10X speed DVD-ROMs. The proposed PLL has a locking range of 75 ~ 370 MHz. A new V-I converter and a differential delay cell are used in a 3-stage ring Voltage Controlled Oscillator (VCO) to reduce jitters. Since the new V-I converter has a wide input range of 0.6 ~ 2.5 V, the VCO gain can be designed to be small. In addition, they propose a new charge pump which has perfect current matching characteristics for sourcing/ sinking currents. This new charge pump reduces the phase offset and the reference spur of the PLL.
| Publisher | Korea University | File Format | |
|---|---|---|---|
| Date Published | March 2001 | ||
| Format | White Papers | ||
| Topics | |||
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