Basic Principles of Operation
5-8 Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT
• Flash A/D Converter
• Viterbi Detector
• ENDEC
• Servo Processor
• Clock Synthesizer
• PLL
• Serial Interface
• TA Detection and Correction
!! ;*,.1*
The pre-compensator introduces pre-compensation to the write data received from
the sequencer module in the DCIIA. The pre-compensated data is then passed to the
R/W Pre-Amplifier and written to the disk. Pre-compensation reduces the write
interference from adjacent write bit.
!! $-3)-.,)-8-4$5
Digital and analog controlled AGC function with input attenuator for extended range.
!! (<*-)
Continuous time data filter which can be programmed for each zone rate.
!! 4-.-,()11*.15-)
Digitally controlled and programmable filter for partial response signal conditioning.
!! )1D*.7
Provides very high speed digitization of the processed read signal.
!! $-3-/*
Decodes ADC result into binary bit stream.
!!?
Provides 16/17 or 24/25 code conversion to NRZ. Includes preamble and sync mark
generation and detection.
!!@ 7**/11*
Servo processor with servo data recovery and burst demodulation.
!!A )*/9+.1-E
Provides programmable frequencies for each zone data rate.
!!:
Provides digital read clock recovery.
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