Data storage apparatus with an A/D converter having a reference

Details Data storage apparatus with an A/D converter having a reference Data storage apparatus with an A/D converter having a reference

1993-06-09

1996-08-13

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

341139, G11B 5035, H03M 162, H03M 184, H03M 188

Patent

active

055462456

ABSTRACT:
A data storage apparatus and method that allows the signal processing circuit to be in integrated form, so that the magnetic storage system may be reduced in size with increased performance is described. The apparatus includes a reproducing head that reproduces information stored on a recording medium, a preamplifier that amplifies the output of the reproducing head, and a low-pass filter. An A/D converter converts the output for the low-pass filter to a digital signal and has a reference voltage. A discriminator is coupled to an output of the A/D converter and discriminates the digital signal. A circuit, coupled to the discriminator, provides negative feedback control of the reference voltage of the A/D converter as a function of the digital signal before the discrimination by the discriminator and the digital signal that has been discriminated by the discriminator.

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