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:
Mar. 21, 1995
Filed:
Oct. 30, 1992
Applicant:
Inventor:
Eugene S Schlig, Somers, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341150 ; 341144 ;
Abstract
A D/A converter which develops the analog output by summing binary-weighted packets of electrical charge. Charge metering techniques are used to generate and sum the charge packets. It is particularly suited to application in the data line driver circuits of thin-film transistor liquid crystal displays. Various embodiments use single or multiple charge packet generators, and the multiple version may generate the packets for the various bits simultaneously, For the highest speed, or else sequentially, for the largest voltage dynamic range.