Patent ID: 7557743

Claim:
A D/A converter comprising: a reference comparison current generator configured to generate a reference comparison current; a first reference current generator configured to generate a first reference current capable of correcting a current level; a first D/A converting part capable of outputting a first full-scale current having a predetermined proportional relationship with the first reference current and capable of generating a first D/A converting voltage in accordance with first input digital data; and a current comparator configured to generate a difference current between the first full-scale current and the reference comparison current to determine a magnitude of the difference current, wherein the first reference current generator corrects the first reference current based on a result determined by the current comparator; and the reference comparison current generator has: a second reference current generator configured to generate a second reference current; and a second D/A converting part capable of outputting a second full-scale current having a predetermined proportional relationship with the second reference current and capable of generating a second D/A converting voltage in accordance with second input digital data, the second full-scale current corresponding to the reference comparison current.