Apparatus and method for current steering digital-to-analog converter units

摘要

A metal-oxide-semiconductor digital-to-analog converter unit includes a multiplicity of current mirror components 20 in a symmetric array, a resistance network activated by voltage sources providing weighted biasing potentials for the current mirror components, and an electrical coupling of the current mirror components to compensate for variations physical properties across converter unit substrate area. The current mirror components 20 include a current steering portion 210-21N-1 and 250-25N-1 coupled to an annular bias transistor 22. The resulting digital-to-analog converter has improved performance characteristics when compared to previously implemented digital-to-analog converter units.