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

A digital-to-analog converter (DAC) comprising:

• an array of current source devices;
• and
• matrix control means for operating predetermined current source devices in a sequential matrix pattern defined by a plurality of generally rectangular submatrix patterns, each submatrix pattern being a substantially mirror image of adjacent submatrix patterns.

A method for operating a digital-to-analog converter (DAC) comprising a first array of current source cells extending in first and second transverse directions and comprising first and second rows of current source cells, the method comprising the step of:

• operating predetermined 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 by generating a plurality of control signals and operating the first row with even control signals and operating the second row with odd control signals.

A method for operating a digital-to-analog converter (DAC) comprising first and second adjacent arrays of current source cells, each array extending in first and second transverse directions, the method comprising the steps of:

• operating predetermined 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;
• and
• operating the current source cells in the first and second arrays in pairs for geometrical averaging.

A method for operating a digital-to-analog converter (DAC) comprising an array of current source devices, the method comprising the step of:

• operating predetermined current source devices in a sequential matrix pattern defined by a plurality of generally rectangular submatrix patterns, each submatrix pattern being a substantially mirror image of adjacent submatrices.