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. 26, 1997
Filed:
Dec. 22, 1995
Robert Chi-Foon Wong, Poughkeepsie, NY (US);
Taqi Nasser Buti, Millbrook, NY (US);
Seiki Ogura, Wappingers Falls, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An improved differential sense amplifier for sensing differences in a parameter at a first locus coupled with a first signal source and a second locus coupled with a second signal source. The sensing is effected by a first sensing element coupled with the first locus and a second sensing element coupled with the second locus. The improvement comprises the first sensing element and the second sensing element having differing sensitivities. In the preferred embodiment of the invention, the sensing elements are field effect transistors, and the sensitivity is established by a threshold voltage characteristic. Preferably, the first signal source provides a dynamic signal to be measured and the second signal source provides a reference signal against which the dynamic signal's changes are compared.