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. 25, 2011
Filed:
May. 21, 2010
Yoshiaki Shimizu, Kasugai, JP;
Hisao Suzuki, Kasugai, JP;
Kenji Ito, Kasugai, JP;
Masashi Kijima, Kasugai, JP;
Yoshiaki Shimizu, Kasugai, JP;
Hisao Suzuki, Kasugai, JP;
Kenji Ito, Kasugai, JP;
Masashi Kijima, Kasugai, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
A D/A conversion circuit for performing D/A conversion at high speeds. The D/A conversion circuit includes a resistor string including a plurality of resistor elements connected between a low-potential power supply and a high-potential power supply. A plurality of first switch groups are connected to the connection nodes between the resistor elements for selectively outputting voltages at the connection nodes. The outputs of the switches of the first switch groups are connected in common to a corresponding one of the nodes. The plurality of nodes are connected to an output terminal of the D/A conversion circuit via a second switch group. Predetermined switches of the first switch groups are connected in parallel to third switches to apply voltages to the nodes.