High speed pre-driver with voltage reference for thin film...

Details High speed pre-driver with voltage reference for thin film... High speed pre-driver with voltage reference for thin film...

2006-06-27

2006-06-27

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

C360S068000

Reexamination Certificate

active

07068450

ABSTRACT:
A preamplifier device (26) for a thin film transducer disk drive system having operation speeds up to and greater than 2 Gb/s. The device (26) includes a low power/high speed driver (203) having a cascaded Class AB buffer. In at least one embodiment the device (26) includes separated drive devices in the driver (203) and H-bridge circuit (205) realized in multiple smaller devices biased separately to reduce transistor self-heating effects and a further embodiment includes a reference (201) having a base cancellation scheme and a Class AB current source for improving accuracy and stability is such high speed devices.

REFERENCES:
patent: 5287231 (1994-02-01), Shier et al.
patent: 5386328 (1995-01-01), Chiou et al.
patent: 6324028 (2001-11-01), Ramalho et al.

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