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:
Jun. 16, 1987
Filed:
Jul. 18, 1984
Applicant:
Inventors:
William J Urschel, Yellow Springs, OH (US);
Edwin A Sloane, Los Altos, CA (US);
Assignee:
Fairchild Semiconductor Corporation, Cupertino, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ; 364727 ;
Abstract
A method of calibrating a feed forward, DAC post-correction system. The method includes fitting the Walsh co-efficiencts of a DAC transfer function to a straight line in the log domain. The deviation of these terms in the log domain is utilized to compute Walsh correction terms for use in the post correction system.