High performance write driver for magnetic inductive recording h

Details High performance write driver for magnetic inductive recording h High performance write driver for magnetic inductive recording h

1997-06-02

1999-11-23

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327374, 363 63, H03B 100

Patent

active

059907100

ABSTRACT:
A circuit is provided to switch a drive transistor in a write driver circuit controlled by a write control signal to direct write current in a selected direction through an inductive head. Current is selectively conducted from a control region of the drive transistor in response to switching of the write control signal. A first bias circuit limits voltage fluctuation at the control region of the drive transistor. A second bias circuit prevents saturation of the drive transistor.

REFERENCES:
patent: 5282094 (1994-01-01), Ngo
patent: 5287231 (1994-02-01), Shier et al.
patent: 5386328 (1995-01-01), Chiou et al.
patent: 5532631 (1996-07-01), Ngo et al.
patent: 5534818 (1996-07-01), Peterson
patent: 5539342 (1996-07-01), Gersbach et al.
"Read/Write Amplifier Design Considerations for MR Heads" by K.B. Klaassen et al, IEEE Transactions on Magnetics, vol. 31, No. 2, Mar. 1995.
"A Resonant Switching Write Driver for Magnetic Recording" by R. J. Reay et al, IEEE Journal of Solid-State Circuits, Vol. 32, No. 2, Feb. 1997.
"A Low-Power 3V-5.5V Read/Write Preamplifier for Rigid-Disk Drives" by T. Ngo et al, ISSCC94/Session 17/Disk-Drive Electronics/Paper FA 17.6. 1994 IEEE International Solid-State Circuit Conference.

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