Current-added-type digital to analog converter and digital to analog converting method thereof

k discloses a current addition type D / A converter and the D / A conversion method for converting an analog signal corresponding to the digital data (= m + n, where k is a natural number, and, m and n is a natural number less than k) bits . Current addition type D / A converter has a current moped, a first current supply portion, the second current supply, the switching unit, switch control signal generating circuit, and a current compensation circuit. A first current supply portion and second current supply unit receives a respective different output current from the current moped. According to the current addition type D / A converter, it is possible to reduce the size of the transistors in the current supply part corresponding to the upper bit, it is possible to reduce the chip size of a semiconductor circuit implementation. In addition, a current compensation circuit due to compensating for some current of the reference current source and the output current only sensed from the current supply, a current addition type D / A converter is capable of minimizing the increase in the area that is caused by adding a current compensation circuit at the same time it is possible to reduce the increase in current consumption.