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:
Oct. 28, 2003
Filed:
Oct. 25, 2000
Kazuo Toraichi, Sayama, JP;
Kouichi Wada, Tsukuba, JP;
Niigata Seimitsu Co.., Ltd., Niigata, JP;
Abstract
A digital-analog converter for producing less distorted output waveforms without the need for an increase in the operating speed of components. A D/A converter comprises a memory , an address counter , a B spline function generation circuit , four sampling function generation circuits , three delay circuits , four amplifiers , and three adding circuits and . Four items of digital data supplied one after another in the predetermined time interval T are stored in the memory . The gain of each of the four amplifiers is set according to the corresponding digital data. The four sampling function generation circuits generate signal waveforms of the sampling function, which appear individually in points a time T away from one another. The signal waveforms are amplified in the amplifier and added to produce an analog signal associated with the interpolation value.