Device for limiting current in a sensor
AssigneeSeagate Technology LLC
InventorAndrew Bishop
Life of this patent
Estimating the term…
Abstract
A read/write device for a disk drive is disclosed. The read/write device includes a pre-amplifier and a recording head. The read/write device also includes a write signal path between the pre-amplifier and the recording head. The write signal path includes a write current. The read/write device also includes a read signal path between the pre-amplifier and the recording head. The read signal path includes an induced current related to the write current. The read/write device also includes a shunt path in the pre-amplifier to draw a part of the induced current from the read signal path.
Claims25
A read/write device for a disk drive, having a pre-amplifier and a recording head, comprising:
- a write signal path between said pre-amplifier and said recording head, said write signal path having a write current;
- a read signal path between said pre-amplifier and said recording head, said read signal path having an induced current related to said write current;
- and
- a shunt path in said pre-amplifier to draw a part of said induced current from said read signal path.
A read/write device, comprising:
- a write signal path having a write current, said write current to induce an induced current in a read signal path;
- and
- a shunt path to shunt said induced current from said read signal path.
A method for limiting a sensor current in a magneto-resistive sensor, comprising:
- inducing a current in a read signal path coupled to said sensor;
- and
- shunting said current from said read signal path with a shunt path, wherein said shunt path is opposite said sensor on said read signal path;
- and
- inducing a voltage in a read signal path coupled to said sensor;
- and
- shunting the current that is generated due to said voltage from said read signal path, wherein said shunt path is opposite said sensor on said read signal path.
Dependencies are inferred from the claim text.