High-speed write driver

Details High-speed write driver High-speed write driver

2006-12-19

2006-12-19

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S423000, C327S589000, C360S046000

Reexamination Certificate

active

07151393

ABSTRACT:
A write driver includes two field-effect/bipolar transistors with feedbacks between the drains/collectors and gates/bases, a write/read switch connected between the drains/collectors and a positive power supply, an impedance matching circuit connected to the drains/collectors to match both differential and common mode output impedance of the write driver to an input impedance of a flex circuit, a common mode output voltage control circuit coupled to the transistors, and a differential mode output voltage control circuit coupled to the transistors.

REFERENCES:
patent: 4879610 (1989-11-01), Jove et al.
patent: 5103353 (1992-04-01), Jove et al.
patent: 5204789 (1993-04-01), Jove et al.
patent: 5327303 (1994-07-01), Smith
patent: 6064261 (2000-05-01), Stein et al.
patent: 6236247 (2001-05-01), Ngo
patent: 6341046 (2002-01-01), Peterson
patent: 6404574 (2002-06-01), Barnett
patent: 6549353 (2003-04-01), Teterud
patent: 6721117 (2004-04-01), Briskin
patent: 6920002 (2005-07-01), Sako et al.
patent: 2003/0234996 (2003-12-01), Ngo
patent: 2004/0120065 (2004-06-01), Takeuchi
Copy of International Search Report mailed May 10, 2006 based on Int'l Application: PCT/US2005/039502.

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