用于BD光盘刻录机的前端处理芯片

The front-end SOC for a Blu-ray disc recorder

一、引言随着信息技术的发展,需要存储和传输的数据越来越多。在所有的存储介质中,光盘存储是最方便和廉价的。

This article introduces issues with implementing a front-end processor for Blu-ray disc(BD)recorder applications.This processor includes partial response maximum likelihood(PRML),a data processor block,and servo blocks.The nonlinear equalizer is designed to boost high-frequency signal components without increasing inter-symbol interference.It can improve the quality of the high-frequency signal fed into the Viterbi detector,reduce jitter,and offer more tilt margins to the system.Due to the proposed nonlinear equalizer in PRML,less than 2 × 10-4 of the symbol error rate(SER),defined as the BD format book,is achieved with tangential tilt margin of ±0.5°.This system on a chip(SOC)carries DP functions of a 17PP modulation code,Reed-Solomon(RS)codec,and buffer management.The Teaklite DSP is embedded for control functions such as focus servo,track servo,and auto calibration.It contains 12 million transistors in a 50 mm2 die,and is fabricated in 0.18 μm CMOS technology.