DIGITAL TO ANALOG CONVERTER

摘要

A digital to analog converter is provided to reduce a manufacturing cost and minimize an area by using both a decoder method and a binary method. A digital to analog converter includes a first control unit(101), and a second control unit(103). The first control unit(101) selects at least one analog level signal of a plurality of analog level signals which are modulated by a predetermined lower bit data signal of n-bit data signals and controlled by the modulated signal. The second control unit(103) is connected to the first control unit(101), and selects and outputs any one level of at least more one analog level which are controlled by a predetermined upper bit data signal of the n-bit data signals. The upper bit data signal has the uppermost one bit. The lower bit data signal has n-1 bits. A decoder(115) modulates the lower bit data signal by an exponent of two. A first transistor group has double times as many as the number of signals which are modulated by the exponent of two.