Product Manual
Page 125
... cylinder at write) into NRZ data by Viterbi detection circuit, convert into NRZ data. The NRZ data is controlled using a digital servo technique by the firmware in MEEPRML method as a total process through analog filter circuit, ADC circuit, FIR filter circuit and Viterbi detection circuit. (3) 32/34 RLL decoding circuit The...
... cylinder at write) into NRZ data by Viterbi detection circuit, convert into NRZ data. The NRZ data is controlled using a digital servo technique by the firmware in MEEPRML method as a total process through analog filter circuit, ADC circuit, FIR filter circuit and Viterbi detection circuit. (3) 32/34 RLL decoding circuit The...
Product Manual
Page 129
... To read /write request, the MPU issues a seek command to the DSP to move to the target cylinder. The head is done by firmware by moving the head-mounted carriage according to a digital signal using the DSP. The digital servo control circuit controls the voice coil motor so ...control. 3) When the motor reaches a high rotational frequency, a counter-electromotive voltage (back EMF) is constant. When the DSP receives this command, the DSP drives the voice coil motor, via the digital-to-analog converter and power amplifier, to move . This centers the head over the target cylinder.
... To read /write request, the MPU issues a seek command to the DSP to move to the target cylinder. The head is done by firmware by moving the head-mounted carriage according to a digital signal using the DSP. The digital servo control circuit controls the voice coil motor so ...control. 3) When the motor reaches a high rotational frequency, a counter-electromotive voltage (back EMF) is constant. When the DSP receives this command, the DSP drives the voice coil motor, via the digital-to-analog converter and power amplifier, to move . This centers the head over the target cylinder.