Write driver with improvements for risetime

Details Write driver with improvements for risetime Write driver with improvements for risetime

1995-09-11

1997-03-18

Kim, W. C.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 68, G11B 509, G11B 502

Patent

active

056128282

ABSTRACT:
The present invention discloses a write driver circuit for driving a magnetic head in an information storage system. The write driver circuit is connected to first and second voltage supply terminals and includes first and second data input terminals for receiving data input signals. The H-switch has a pair of pull-up transistors and a pair of pull-down transistors to switch current flow between a first direction and a second direction which is opposite to the first direction. A pair of anti-saturation circuits are connected to the H-switch to bias the pull-up transistors. The anti-saturation circuits contain a transistor having a collector, a base and an emitter and a pair of substantially similar diodes connected between the base and the collector of the transistor.

REFERENCES:
patent: 4523238 (1985-06-01), Keel et al.
patent: 4816934 (1989-03-01), Tsuyuguchi
patent: 5067032 (1991-11-01), Ida
patent: 5132852 (1992-07-01), Price, Jr.
patent: 5282094 (1994-01-01), Ngo
patent: 5287231 (1994-02-01), Shier et al.
patent: 5291347 (1994-03-01), Ngo et al.
patent: 5296975 (1994-03-01), Conteras et al.
A. Pshaenich, Electronic Design 4, Feb. 15, 1977, pp. 86-91.
R. Grimmer, "Data Bus Driver", IBM Technical Disclosure Bulletin, vol. 20, No. 5, Oct. 1977.

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