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:
Aug. 25, 2020
Filed:
Dec. 10, 2018
Beijing Spreadtrum Hi-tech Communications Technology Co., Ltd, Beijing, CN;
BEIJING UNISOC COMMUNICATIONS TECHNOLOGY CO., LTD., Beijing, CN;
Abstract
A method for arranging a current source array of a DAC and a layout of a common-source current source array are provided in embodiments of the present disclosure for improving linearity and related performance of the DAC. The method includes, determining a number R of rows and a number C of columns of a common-source current source array; dividing the common-source current source array into M sub-arrays; segmenting the DAC to obtain (2−1) groups of thermometer encoding current sources and Y groups of binary encoding current sources; arranging the (2−1) groups of the thermometer encoding current sources into the M sub-arrays, arranging Y groups of binary encoding current sources into the M sub-arrays based on a number of binary encoding current sources in each of Y groups; arranging bias current sources evenly into the common-source current source array; and arranging other current sources as dummy cells.