Write driver with power optimization and interconnect...

Details Write driver with power optimization and interconnect... Write driver with power optimization and interconnect...

2008-05-20

2008-05-20

Nguyen, Hoa Thi (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

C360S065000, C360S067000, C360S068000

Reexamination Certificate

active

07375909

ABSTRACT:
A write driver for driving a write current through a write head connected to the write head by an interconnect or flexible transmission line. The write driver includes a circuit matching an output impedance of the write driver to the odd characteristic impedance of the interconnect and includes a current source generating a current output to the write head. The write driver provides a current amplification effect as the output current is half the write current driven through the write coil. The impedance matching circuit includes an output resistor with a resistance equal to the odd characteristic impedance of the interconnect. The write driver includes a voltage source that operates to maintain a voltage drop of zero on the output resistor during the initial period of twice the transmission delay of the interconnect.

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