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. 16, 1993
Filed:
Nov. 18, 1991
Hitachi, Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corporation, Kodaira, JP;
Abstract
A resistor-string divided into plural sets of unit-resistors generates plural reference voltages for the upper bits, while each divided set generates plural reference voltages for the lower bits. A first and second differential input are generated in direct and inverse proportion to the analog input voltage. Differential comparators for the upper bits compare two differential voltages from between the two reference voltages and the first and second differential input votlages. Two of the divided sets are selected according to the upper bit digital value and one reference voltage from each selected set is switched to a differential comparator for the lower order bits. Lower order bit comparison is similar to the high order comparison described above. Final digital value is obtained by linking the upper and lower bits digital value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile