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:
Aug. 17, 2010
Filed:
Jan. 29, 2008
Michael A. Sperling, Poughkeepsie, NY (US);
Paul D. Muench, Poughkeepsie, NY (US);
George E. Smith, Iii, Wappingers Falls, NY (US);
Michael A. Sperling, Poughkeepsie, NY (US);
Paul D. Muench, Poughkeepsie, NY (US);
George E. Smith, III, Wappingers Falls, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for generating a voltage that is proportional to an absolute temperature (PTAT voltage). A current generator for generating a current that is proportional to absolute temperature (PTAT current) has an internal resistance and two diodes. The PTAT current is proportional to the resistance, and the temperature coefficient of the PTAT current is defined by the ratio of diode current densities. A feedback circuit has a source follower that is connected to the current generator for driving the output node with a regulated PTAT current wherein the PTAT current is mirrored accurately, providing a constant Vref.