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:
Dec. 06, 1988
Filed:
Feb. 25, 1988
Applicant:
Inventors:
John A Carelli, Allentown, PA (US);
Richard A Pedersen, New Tripoli, PA (US);
Robert L Pritchett, Bath, PA (US);
Assignee:
American Telephone and Telegraph Co., AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
3241 / ; 324133 ;
Abstract
An integrated circuit includes first and second field effect transistors having differing channel lengths, and a means for comparing the channel currents flowing therethrough. An excessive difference of currents indicates 'short channel' effects, which can degrade performance. A signal flag indicating this condition may be provided to a test pad on the chip, or used to disable operation of the integrated circuit, or otherwise used to provide an indication.