The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 1999
Filed:
May. 21, 1998
Applicant:
Inventors:
Tuan V Ngo, Eden Prairie, MN (US);
Craig M Brannon, Maplewood, MN (US);
Assignee:
VTC Inc., Bloomington, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
327538 ; 360 66 ; 360 67 ;
Abstract
An open-loop biasing circuit for a magnetoresistive element provides high common mode and power supply rejection. Two current sources are connected together by two conduction paths. A first conduction path has two impedances. One impedance is tied between the first current source and ground and the second impedance is tied between the second current source and ground. The second conduction path includes the magnetoresistive element. A capacitive path between the two current sources reduces power supply noise and a voltage follower reduces parasitic capacitance in the capacitive path.