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. 01, 1999
Filed:
Oct. 21, 1996
Applicant:
Inventor:
Chong Lim Neoh, Belle Vue, SG;
Assignee:
Tritech Microelectronics International Ltd., Singapore, SG;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G08C / ;
U.S. Cl.
CPC ...
36470911 ; 39575003 ; 178 1901 ;
Abstract
A digitizing tablet has an improved operation for saving power. After an input device contacts the tablet surface, resistive sheets provide analog pen position signals to a sample/track and hold circuit. Once the signals are captured by the sample/track and hold, power is removed from the resistive sheets and digitization of the analog signals is performed. During an input waiting period, power is further conserved by removing power from the sample/track and hold and analog-to-digital converter, as a separate level detect circuit detects contact with the tablet surface by an input device.