Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2005-04-19
2005-04-19
Faber, Alan T. (Department: 2651)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
C360S068000
Reexamination Certificate
active
06882485
ABSTRACT:
A method and system for calibrating the write current of a current mode write driver having a first PFET coupled to a first NFET at a first node connected to a first side of a write head of the write driver, and a second PFET coupled to a second NFET at a second node connected to a second side of the write head. The write driver also defines an INODE where a source of the first NFET is coupled to a source of the second NFET, and the write driver is put in a state where all FET devices are in an off condition. A precision resistor R is connected from the NODE I/O pin of the write driver to a positive potential VDD I/O pin of the write driver, causing a current I1 to flow, where I1=V/R, and V is a voltage across the resistor.
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Barkley Jean M.
Faber Alan T.
Scully Scott Murphy & Presser
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