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:
Dec. 03, 2002
Filed:
Jul. 31, 2001
Yukio Koyanagi, Saitama, JP;
Other;
Abstract
It is object to provide an oversampling circuit and a digital-to-analog converter which have small circuit scales and component costs of which are reduced. The data input at predetermined intervals is multiplied by the multiplying section by four types of multiplicators, and the multiplication results are cyclically held in data holding sections - through - . The data selectors - through - sequentially read out the four types of multiplication results held in the data holding sections - through - one to one corresponding respectively to the data selectors - through - in a predetermined order, thereby outputting predetermined step functions. Each step function corresponding to each of the four pieces of data inputted sequentially is generated at a different timing, each of the integrating sections - through - performs a digitally integrating process two times on each step function, and the results are added up, thereby performing the oversampling process to give a pseudo-rise of a sampling frequency to each piece of input digital data.