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:
Oct. 03, 1989
Filed:
Feb. 08, 1988
Applicant:
Inventors:
Lawrence E Larson, Los Angeles, CA (US);
Joseph F Jensen, Malibu, CA (US);
Robert H Walden, Westlake Village, CA (US);
Adele E Schmitz, Newbury Park, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341134 ; 341136 ; 357 237 ;
Abstract
An analog-to-digital converter 10 employs a series of comparators 12, 14, 16 and 18. Each comparator includes at least one inverter consisting of a CMOS transistor pair including a P-channel transistor 22 and N-channel transistor 24. The threshold levels of the transistors 22, 24 are modified using focused ion beam implantation techniques to provide the comparators with monotonically increasing transistion levels.