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:
Jul. 21, 1998
Filed:
Jun. 20, 1995
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha TEC, Shizuoka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ; G08C / ;
U.S. Cl.
CPC ...
345174 ; 178 18 ; 178 19 ; 341139 ; 341158 ; 341172 ;
Abstract
A digitizer includes a reference level generator for generating a reference level, a comparator for comparing a signal level of the analog input with the reference level to provide a digitized output, a first detecting circuit for detecting a moderate change in the signal level of the analog input so as to change the reference level in accordance with the detected moderate change in the signal level of the analog input, and a second detecting circuit for detecting a rapid change in the signal level of the analog input so as to change the reference level in accordance with the detected rapid change in the signal level of the analog input.