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:
Dec. 28, 1999
Filed:
Jun. 22, 1998
Jun Iida, Kanagawa, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A D/A converter has one single input transistor used in common with a plurality of output transistors to together form current mirrors, and a decoder serves to sequentially select the current mirrors in response to a digital input, causing to generate a corresponding analog output from currents from selected ones of the current mirrors. The commonly used input transistor is centrally located with respect to the current mirrors such that the difference between the maximum and minimum distances, or that between the maximum and minimum parasitic resistances, between the input transistor used in common and the output transistors is reduced and the conversion characteristic can be improved.