Array-Reader Based Magnetic Recording Systems With Frequency Division Multiplexing
AssigneeLSI Corporation
InventorsGeorge Mathew, Bruce Wilson, Suharli Tedja, Eui Seok Hwang
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Abstract
A magnetic recording system includes an array of analog inputs operable to receive analog signals retrieved from a magnetic storage medium, a modulator operable to combine the analog signals to yield a frequency division multiplexed signal, a demodulator operable to yield a plurality of demodulated signals from the frequency division multiplexed signal corresponding to each channel of the array, and a joint equalizer operable to filter the plurality of demodulated signals to yield an equalized output.
Claims20
A magnetic recording system comprising:
- an array of analog inputs operable to receive analog signals retrieved from a magnetic storage medium;
- a modulator operable to combine the analog signals to yield a frequency division multiplexed signal;
- a demodulator operable to yield a plurality of demodulated signals from the frequency division multiplexed signal corresponding to each channel of the array;
- and
- a joint equalizer operable to filter the plurality of demodulated signals to yield an equalized output.
A method of connecting an array-reader head assembly in a magnetic storage system to a read channel in the magnetic storage system, comprising:
- providing a modulator in the array-reader head assembly operable to yield a frequency division multiplexed signal containing an array of analog signals from the array-reader head assembly;
- connecting the modulator in the array-reader head assembly to the read channel by a flexible cable pair;
- providing a demodulator in the read channel operable to yield a plurality of demodulated signals from the frequency division multiplexed signal corresponding to each element of the array;
- and
- providing a joint equalizer in the read channel operable to filter the plurality of demodulated signals to yield an equalized output.
A storage system comprising:
- a storage medium;
- an array-reader head assembly disposed in relation to the storage medium and operable to provide an array of analog signals corresponding to information on the storage medium;
- a modulator operable to combine the array of analog signals to yield a frequency division multiplexed signal;
- and
- a flexible cable operable to carry the frequency division multiplexed signal from the array-reader head assembly to a read channel circuit, the read channel circuit comprising:
- a demodulator operable to yield a plurality of demodulated signals from the frequency division multiplexed signal corresponding to each channel of the array;
- and
- a joint equalizer operable to filter the plurality of demodulated signals to yield an equalized output.
Dependencies are inferred from the claim text.