D/A CONVERTER AND A/D CONVERTER - MATSUSHITA ELECTRIC IND CO LTD

Title:

D/A CONVERTER AND A/D CONVERTER

Document Type and Number:

WIPO Patent Application WO/1993/025006

Kind Code:

A1

Abstract:

A D/A converting device of a highly precise over-sampling system by noise shaping, which does not require any high-frequency clock and any complex D/A converting circuit, and a highly precise A/D converting device having a structure to which the D/A converting device is applied. In the D/A converting device, a digital signal is divided and output to a plurality of uniformed one-bit D/A converters, and the one-bit D/A converters are used cyclically in order to eliminate correlation between the digital signal and the output value of a specific one-bit D/A converter, thus reducing noise and distortion due to relative errors in the one-bit D/A converters.

Inventors:

TANI YASUNORI (JP)
KANEAKI TETSUHIKO (JP)
SOBAJIMA AKIRA (JP)
HATANAKA HIDEAKI (JP)
FUKUMOTO YOSHIHIKO (JP)

Application Number:

PCT/JP1993/000717

Publication Date:

December 09, 1993

Filing Date:

May 28, 1993

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
TANI YASUNORI (JP)
KANEAKI TETSUHIKO (JP)
SOBAJIMA AKIRA (JP)
HATANAKA HIDEAKI (JP)
FUKUMOTO YOSHIHIKO (JP)

International Classes:

H03M1/06; H03M3/04; H03M1/66; H03M1/68; (IPC1-7): H03M1/74; H03M3/02

Foreign References:

JPH0319524A	1991-01-28
JPH03143026A	1991-06-18
JPH0472820A	1992-03-06
JPH04152715A	1992-05-26

Other References: