Programmable pre-amplifier using a serial shift register to outp

Details Programmable pre-amplifier using a serial shift register to outp Programmable pre-amplifier using a serial shift register to outp

1994-08-15

1996-01-30

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 46, G11B 502, G11B 509

Patent

active

054885183

ABSTRACT:
A data storage system for storing and retrieving data signals on magnetic medium includes a magnetic transducer, a controller for issuing instructions, and a pre-amplifier adaptive to data storage parameters. The pre-amplifier includes a read amplifier having an adjustable gain, a write driver having an adjustable current source, and a serial shift register responsive to the instructions to selectively operate the read amplifier and the write driver and to issue control signals to first and second digital-to-analog converters to adjust the gain of the read amplifier and the current source of the write driver. Preferably first and second multiplexers are responsive to the control signals to select one of a plurality of magnetic transducers.

REFERENCES:
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patent: 4918397 (1990-04-01), Kidger
patent: 5034699 (1991-07-01), Powell
patent: 5157559 (1992-10-01), Gleason et al.
patent: 5321559 (1994-06-01), Nguyen et al.

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