Write driver with H-switch synchronizing transistors

Details Write driver with H-switch synchronizing transistors Write driver with H-switch synchronizing transistors

1993-05-26

1994-03-01

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 46, 360 66, G11B 502, G11B 503, G11B 509

Patent

active

052913473

ABSTRACT:
A write driver for driving a transducer in a storage system. The write driver includes first and second supply terminals and a H-switch for switching current flow through the transducer between a first direction and a second direction, opposite to the first direction. The H-switch includes pull-up transistors and pull-down transistors connected across the transducer for switching current flow through the transducer. Each pull-up transistor and pull-down transistor has a control terminal for controlling current flow through the transistor. The write driver further includes data input terminals for receiving data signals. A bias circuit is connected between the control terminals of the pull-up and pull-down transistors and the data input terminals for switching the pull-up and pull-down transistors between conducting and non-conducting states as a function of the received data signals. Each pull-down transistor has a corresponding synchronizing transistor connected between the control terminal of the pull-down transistor and the second supply terminal, which pulls current away from the control terminal of the pull-down transistor when the pull-down transistor is switched to the non-conducting state.

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Microelectronics, Jacob Millman, (1979), A Biasing Technique and Current Repeaters, pp. 537-540.
Analysis and Design of Analog Integrated Circuits, Paul R. Gray and Robert G. Meyer, (1984), Transistor Current Sources and Active Loads, pp. 241-246.
Analysis and Design of Analog Integrated Circuits, Paul R. Grey and Robert G. Meyer, (1984), Supply-Independent Biasing, pp. 275-280.
IBM Technical Disclosure Bulletin, J. A. Bailey, R. G. Black, Jr., and J. Lewkowics, Predriver for "H" Configured Write Driver for Magnetic Recording, vol. 23, No. 11, Apr. 1981, pp. 5167-5168.

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