Patent ID: 7420495

Claim:
A current source cell arrangement comprising: current source cells arranged in a two dimensional matrix, a plurality of current source cells being connected to form a current source having a predetermined current value; wherein current source cells in any one row of the two dimensional matrix are labeled with letters from a l to a n , (where n is an integer above 4), a first kind of row has a same order as this row, and a second kind of row is related to the first kind of row by exchanging a series of elements being letters from a i to a i+j , (where both i and j are integers at least 1 and i+j is an integer not more than n/2), for a series of elements being letters from a k to a k+j where k is an integer larger than n/2 and k+j is an integer not more than n, said two dimensional matrix comprising a same number of these two kinds of row; the current source cells in each row with a same letter among letters from a i to a i+j and from a k to a k+j are connected one by one across all the rows.