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:
Jul. 12, 2011
Filed:
Aug. 06, 2007
Hideto Fukuda, Kasugai, JP;
Shinya Udo, Kasugai, JP;
Masao Kumagai, Kasugai, JP;
Osamu Kudo, Kasugai, JP;
Hideto Fukuda, Kasugai, JP;
Shinya Udo, Kasugai, JP;
Masao Kumagai, Kasugai, JP;
Osamu Kudo, Kasugai, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
A D/A converter for receiving a plurality of divisional voltages and converting a digital signal to an analog voltage with the divisional voltages, the D/A converter includes a selection circuit for receiving the divisional voltages and the digital signal to select one of the divisional voltages. The selection circuit includes a plurality of first switch circuits that are selectively activated in response to the digital signal to select one of the divisional voltages, with each of the first switch circuits being provided with a logic switch function and having an ON resistance when activated, and at least an activated one of the first switch circuits further dividing the selected one of the divisional voltages with the ON resistance. The plurality of switch circuits includes at least one voltage dividing switch circuit used to further divide the selected one of the divisional voltages.