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:
Nov. 22, 2005
Filed:
Oct. 27, 2003
Applicant:
John Joseph Price, Jr., Eagan, MN (US);
Inventor:
John Joseph Price, Jr., Eagan, MN (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G05F001/10 ;
U.S. Cl.
CPC ...
Abstract
Disclosed is a circuit and method for generating a tail current for a main reader amplifier () input stage using a scaled master differential stage () with a given offset to force a given output current, preceded by a balanced stage () to get a balanced offset. Current must be set by a feedback arrangement in the dummy master stage () which is a scaled version of the main reader amplifier input stage (). The current derived in the dummy master stage (), when appropriately scaled and used as the tail current of the main reader amplifier () input stage provides a precisely controlled gain.