Patent ID: 8085174

Claim:
A current-mode DAC capable of prospective correction, comprising: at least one to-be-corrected current source; a referential current source electrically connected with the at least one to-be-corrected current source; a current comparator electrically connected with the referential current source and the at least one to-be-corrected current source for comparing the current outputted by the at least one to-be-corrected current source and the current of the referential current and outputting the result of the comparison; a correction controller electrically connected with the to-be-corrected current source; a successive approximation register controller electrically connected with the current comparator and the correction controller and controlled by the correction controller and referring to the result of the comparison from the current comparator for successive approximation; and at least one correction DAC, whose number corresponds to that of the at least one to-be-corrected current source, and electrically connected with the successive approximation register controller and the at least one to-be-corrected current source for providing a bias for the at least one to-be-corrected current source by reference to the result of the comparison for carrying out current correction.