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:
Jan. 30, 1990
Filed:
Mar. 18, 1988
Hiroshi Fujii, Kariya, JP;
Kenji Kanemaru, Toyota, JP;
Yoshinori Fujihashi, Motosu, JP;
Nobuyoshi Morita, Kariya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An analog-to-digital converter of the successive-approximation type has a successive-approximation logic circuit for successively generating selection signals defined by significant bits in a digital value, a string of high resistance elements to provide voltage dividers for successively dividing a reference voltage into divided voltages, a switch matrix circuit for generating the divided voltages when activated in response to the selection signals, a comparator for successively comparing an analog level with the divided voltages and for generating comparison signals respectively indicative of the significant bits and an output circuit for generating an output digital signal defined by the significant bits when applied with all the comparison signals, the output circuit being associated with the logic circuit for causing it to generate the selection signals in response to the comparison signals. A string of low resistance elements are provided to apply therethrough the reference voltage to at least one of the voltage dividers during a short period of time immediately after the one of the voltage dividers has been activated.