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. 29, 2003
Filed:
Feb. 21, 2002
Shunichi Ko, Kawasaki, JP;
Kiyoko Honda, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A zero transition voltage and a full transition voltage are inputted into the A/D converter, digital converted values of these voltages are fed back to a device fluctuation correction circuit and H side and L side reference voltages AVRH and AVRL are determined so as to obtain digital outputs corresponding to the respective transition voltages. Also, the digital output of the A/D converter is fed back to a high resolution corresponding circuit and a difference between AVRL and AVRH is decreased to be half as before by changing AVRL or AVRH according to an analog input voltage applied to the A/D converter and A/D conversion is performed again. By repeating this operation, significant bit values are obtained. A merge circuit merges the significant bit values with less significant bit values outputted from the A/D converter.