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:
Nov. 26, 2002
Filed:
Jul. 31, 2001
Yukio Koyanagi, Saitama, JP;
Yasue Sakai, Urawa, JP;
Abstract
It is object to provide an oversampling circuit and a digital to analog converter capable of realizing a smaller circuit and reducing a cost of parts. The oversampling circuit comprises multiplying section , four data holding sections through , four data selectors through , an adding section , and two integrating circuits and . Input data is multiplied by four multiplicators by the multiplying section , and four multiplication results held, as one set, in the data holding sections. The data selectors read out the data held in the four data holding sections in a predetermined order and generate step function data. The adding section adds the values of four step functions outputted from the respective data selectors, and then digital integrating operations corresponding to the sum are carried out by means of two integrating circuits.