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. 12, 1984
Filed:
Feb. 16, 1982
Kazuo Kato, Ibaraki, JP;
Nobuaki Miyakawa, Hitachi, JP;
Makoto Aihara, Hitachi, JP;
Kiyoshi Matsubara, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An analog data acquisition device fetches a plurality of analog data by a multiplexer in time-division, compares the analog data fetched with a reference value applied from a digital-to-analog converter by a two-input comparator, and produces the result of comparison to a data bus. The result of comparison is also applied to a successive approximation register where the analong-to-digital conversion is effected by successively changing the digital data to the digital-to-analog converter, and the digital data converted is read out onto the data bus. The digital data applied to the digital-to-analog converter is either the output from the successive approximation register or the output from the reference register loaded through the data bus, in accordance with the contents of the control register loaded through the data bus. Thus, in which mode the device operates, in the comparing mode or in the analog-to-digital conversion mode, is selected by the control register.