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. 27, 2004
Filed:
Sep. 19, 2002
Yukihisa Kinugasa, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A digital-to-analog converter which can be used with multi-bit digital codes without increasing the module size thereof, as well as a current source and a differential amplifier, which are preferably used in the digital-to-analog converter. A constant current source supplies a current corresponding to the LSB in a digital code to be converted, resistors generate voltages corresponding to bits other than the LSB in the digital code, and as the generated voltages are applied to the gate terminals of MOSFETs, the MOSFETs permit passage of the currents corresponding to the bits other than the LSB in the digital code. A current source, together with the resistors, provides voltages to be applied to the gate terminals of the MOSFETs, which voltages make the MOSFETs operate in a sub-threshold region, and also make the MOSFETs permit passage of the currents corresponding to the bits.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile