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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
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.
Digital and analog controlled AGC function with input attenuator for extended range.
Continuous time data filter which can be programmed for each zone rate.
Digitally controlled and programmable filter for partial response signal conditioning.
Provides very high speed digitization of the processed read signal.
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.
Servo processor with servo data recovery and burst demodulation.
Provides programmable frequencies for each zone data rate.
Provides digital read clock recovery.