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:
Feb. 21, 1995
Filed:
Dec. 17, 1993
James O Groves, Jr, Endicott, NY (US);
Jonathan J Hurd, Vestal, NY (US);
Stephen F Newton, Endicott, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A circuit for providing an output current proportional to a first voltage raised to a fractional exponential power divided by a second voltage raised to a fractional exponential power, is supplied. The circuit has four strings of series connected pn junctions. The first and second voltages are connected to the first and fourth string, respectively. A reference current is provided to the second string, while the third string provides the output current. The number of pn junctions are chosen to give the desired fractional exponents of the two voltages while the number of pn junctions in the third string is selected to adjust for the number of pn junctions in the other strings.