Active pull-down write driver for three-terminal inductive load

Details Active pull-down write driver for three-terminal inductive load Active pull-down write driver for three-terminal inductive load

1994-11-17

1996-07-02

Wambach, Magraret Rose

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327304, 327423, H03K 300, H03K 104

Patent

active

055326315

ABSTRACT:
A write driver for a magnetic transducer having a three-terminal inductive coil includes first and second voltage sources, a write current source, and a switching network having first and second switching transistors connected between the second voltage source and the respective first and second taps. The switching network responds to respective first and second inputs to switch the write current between respective first and second taps. Active pull-down subcircuits operate to alternately supply base current to the respective first and second switching transistors to charge parasitic capacitances of the respective switching transistors and to alternately sink base current from the respective switching transistors to discharge parasitic capacitances.

REFERENCES:
patent: 4050086 (1977-09-01), Harr
patent: 4523238 (1985-06-01), Keel et al.
patent: 4816934 (1989-03-01), Tsuyuguchi
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), Contreras et al.
patent: 5397878 (1995-03-01), Chen
Pshaenich. Electronic Design 4, Feb. 15, 1977 pp. 86-91.
IBM Tech Disc. Bul. vol. 20, No. 5, Oct. 1977 Grimmes "Data Bus Driver".

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