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:
Jan. 07, 2003
Filed:
Aug. 15, 2001
Delbert R. Cecchi, Rochester, MN (US);
Charles C. Hanson, Kenyon, MN (US);
Curtis W. Preuss, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A resistance circuit includes an off-chip resistor having a precision resistance; a plurality of on-chip switchable resistors, each of which is capable being switched so as to be coupled in parallel to a nominal resistor; and a resistance comparison unit. The resistance comparison unit compares a plurality of on-chip comparison resistors to the off-chip resistor and couples a number of the on-chip switchable resistors to the nominal resistor so that the combined resistance of the parallel combination of the nominal resistor and the coupled on-chip switchable resistors is within a predetermined range of the precision resistance.