Current control circuit and method for programmable read write p

Details Current control circuit and method for programmable read write p Current control circuit and method for programmable read write p

1995-08-11

1998-08-04

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

327538, G11B 509

Patent

active

057903310

ABSTRACT:
Write and read bias current control circuits are programmable through a control port. Both the read head bias DAC and the write DAC are controlled through a control port and both DACs use current as an input reference. The write and the read bias currents have constant reference current components which are set externally. The write and the read bias currents additionally have components which are a product of the reference current and a digital word loaded into an associated one of the DACs.

REFERENCES:
patent: 5339202 (1994-08-01), Heinz et al.
Shier, J., "VM7000/VM7200 Application Note: Current Gain of 20 vs. Current Gain of 1 for 5-Volt Read/Write Preamplifiers", VTC, Inc., Jul. 1991.

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