Balanced arrangement for reading information from a track on a r

Details Balanced arrangement for reading information from a track on a r Balanced arrangement for reading information from a track on a r

1994-10-05

1996-09-24

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 66, G11B 502

Patent

active

055596460

ABSTRACT:
An arrangement for reading out an information signal from a magnetic record carrier. The arrangement includes a read head having a magneto-resistive element with a first terminal connected to a first point of constant potential, and a second terminal; a bias-current generator having an output for supplying a bias-current to the MR element and an amplifier circuit having a first terminal coupled to the output of the bias-current generator, and a second terminal coupled to the second terminal of the MR so as to form a series arrangement of the bias-current generator, the amplifier circuit and the MR element. At an output terminal of the amplifier circuit, the information signal is available. The amplifier circuit includes a MOS transistor connected between the output terminal and the second terminal; and a feedback circuit, including a resistor and a capacitor, having a low cut-off frequency which provides a bias voltage to the gate of the MOS transistor and forces the entire bias-current of the bias-current generator to flow through the MR element The arrangement is balanced with an additional MR element (optional), bias-current generator and amplifier circuit, which are substantially the same as the MR element, bias-current generator and amplifier circuit, respectively, with the cut-off capacitors of the two individual amplifiers being cross-coupled to reduce noise.

REFERENCES:
patent: 5103353 (1992-04-01), Jove et al.
patent: 5204789 (1993-04-01), Jove et al.
patent: 5270882 (1993-12-01), Jove et al.
patent: 5345346 (1994-09-01), Brannon et al.
patent: 5426542 (1995-06-01), Smith

Affiliated with

Also associated with

Rating

Balanced arrangement for reading information from a track on a r does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Balanced arrangement for reading information from a track on a r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balanced arrangement for reading information from a track on a r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1933473