G - Physics – 01 – R
Patent
G - Physics
01
R
330/20, 324/60
G01R 33/06 (2006.01) G01R 33/09 (2006.01) G11B 5/02 (2006.01) G11B 5/39 (2006.01) G11B 5/00 (2006.01) G11B 19/02 (2006.01)
Patent
CA 1268223
ABSTRACT OF THE INVENTION AMPLIFICATION OF SIGNALS PRODUCED BY A CURRENT BIASED MAGNETORESISTIVE SENSOR A transimpedance amplifier for biasing and amplifying the signals produced by a magnetoresistive element is provided. Electrically, the resistance of the element is disposed as degenerative feedback in the emitter circuit of a differential pair comprising the input stage of the amplifier. Bias current for the element is supplied by the same current source that supplies current to the differential pair. DC feedback to the input stage balances current flow in both paths of the differential input stage to correct for DC offset arising in the output from variations transistor characteristics and the steady-state value of the magnetoresistive element. The amplified signal, representing .DELTA.Rh/Rh, is sensed as a current through the magnetoresistive element, where .DELTA.Rh is the change in steady-state resistance, Rh, of the element.
532246
Jove Stephen Alan
Klaassen Klaas Berend
Hitachi Global Storage Technologies Netherlands B.v.
Saunders Raymond H.
LandOfFree
Amplification of signals produced by a current biased... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplification of signals produced by a current biased..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplification of signals produced by a current biased... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1200533