System and method providing programmable GMR head pin layer reset in conjunction with high density drive read/write preamplifiers
OwnerDavid Ng, Yuji Isobeinventors
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Abstract
A system and methodology is provided for resetting a pin layer within a GMR/Spin-Valve head. The system includes a preamplifier to at least one of read, write, and bias a GMR head having a pin layer. A pin layer reset circuit generates a programmable signal to reset the pin layer, wherein the programmable signal is adjustable according to at least one of a signal magnitude, signal polarity, signal pulse duration, and signal duty cycle. The programmable signal can include a voltage and and/or current.
Claims24
A GMR head system, comprising:
- a preamplifier operable to at least one of read, write, and bias a GMR head having a pin layer associated therewith;
- and
- a pin layer reset circuit operably associated with the preamplifier and operable to generate a programmable signal to reset the pin layer, wherein the programmable signal is adjustable according to at least one of a signal magnitude, signal polarity, signal pulse duration, and signal duty cycle.
The system of claim 8, wherein the switch is at least one of a gate, transistor, FET, and MOSFET.
A method providing a pin layer reset signal to a GMR head, comprising:
- generating a configurable signal;
- adjusting at least one of a magnitude, polarity, and timing parameter associated with the configurable signal based on data associated with the GMR head;
- and
- resetting a pin layer associated with a GMR head via the configurable signal.
A GMR head system, comprising:
- means for reading, writing, and biasing a GMR head having a pin layer;
- and
- means for generating a programmable signal to reset the pin layer, wherein the programmable signal is adjustable according to at least one of a signal magnitude, signal polarity, signal pulse duration, and signal duty cycle.
A high density disk drive, comprising:
- a storage media;
- a preamplifier operable to at least one of read, write, and bias a GMR head having a pin layer and operatively coupled to the storage media;
- and
- a pin layer reset circuit operably associated with the preamplifier and operable to generate a configurable signal to reset the pin layer, wherein the configurable signal is adjustable according to at least one of a signal magnitude, signal polarity, signal pulse duration, and signal duty cycle.
Dependencies are inferred from the claim text.