Digital including the current cell matrix with enhanced linearity-to-analog converter and associated methods.

摘要

A digital-to-analog converter (DAC) includes a first array of current source cells extending in first and second transverse directions, and a two-dimensional symmetrical controller for operating current source cells of the first array based upon at least a portion of digital input words and in a symmetrical sequence in both the first and second directions with respect to a medial position of the first array. The medial position defines a centroid for the first array. The two-dimensional symmetrical controller includes a decoder for generating a plurality of control signals based upon predetermined most significant bits (MSBs) of digital input words. The first array comprises a plurality of second current source cells, and the two-dimensional symmetrical controller operates the plurality of second current source cells based upon predetermined LSBs of digital input words. The DAC may include a substantially identical second array adjacent the first array. The two-dimensional symmetrical controller may operate the current source cells in the first and second arrays in pairs and in a substantially mirror image sequence to provide geometrical averaging. IMAGE