Title：Current source conduction array and its construction method for current-steering DAC
Country：China
Patent No.：201010221744.8
Legal Status：Authorized
Inventor：Dongmei Li, Hao Chen, Liyuan Liu
Assignee：Tsinghua University
Address：Institute of Microelectronics,Tsinghua Univ. Beijing,10084
Filing Date：2010-07-02
Issue Date：2013-06-19
Abstract：
The invention relates to a configuration method of a current source conduction array used in a current-mode digital to analog converter, belonging to the technical field of integrated circuits. The method comprises the following steps of: firstly configuring a 4-bit basic conduction array consisting of sixteen 4*4 sub-matrixes, wherein each cell element in the array represents a serial number of a conduction sequence of a unit current source, each unit current source is divided into sixteen small current sources, each current source respectively occupies a small current source in each row andeach column of the basic conduction array, and the serial numbers of the conduction sequences of the whole basic conduction array are distributed in centrosymmetric way; expanding the conduction serial number of each current source in the basic conduction array to generate a 2*2 array; and finally obtaining a conduction array suitable for a 6-bit equal weight current source array. The conduction array configured by the method can completely eliminate the primary gradient error, inhibit the secondary error very well and prevent the accumulation of the gradient error.
Patent Certificate：
PDF/Jpg