Voltage bias, current sense preamplifier using no AC-coupling capacitors for a dual strip magnetoresistive reader
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 1, 2001
Grant Date -
N/A
app pub date -
Apr 2, 1999
filing date -
Apr 6, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A read system for receiving information from a storage medium and for supplying a signal to circuitry external to the read system is disclosed. The read system includes a bias current generator, individual channel circuitry, and preamplifier circuitry. The individual channel circuitry further includes a first and a second magnetoresistive element. A plurality of transistors are connected to the first and the second magnetoresistive element and are cross-coupled to each other to cancel out any noise arising from a mismatch of the first and the second magnetoresistive element. The preamplifier circuitry further includes a first gain stage and a second gain stage separated by a first and a second capacitor. The first and the second capacitors permit an AC signal from the first gain stage to the second gain stage, while blocking unwanted DC signals which are necessary to properly bias the first and the second MR element.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully