Digital to-analog converter

A digital-to-analog converter comprising:

• a complementary PWM circuit for generating a first pulse width modulation signal and a second pulse width modulation signal that are complementary to each other from an input signal in response to a sampling synchronous signal synchronized with a clock, for combining a positive signal and a negative signal of the first pulse width modulation signal, and for outputting two sets of the first pulse width modulation signal combined and the second pulse width modulation signal;
• a constant current source;
• a splitting circuit for halving a constant output current supplied from the constant current source;
• a differential current switch circuit for carrying out switching control of the individual currents halved by the splitting circuit in response to two sets of the first pulse width modulation signal combined and the second pulse width modulation signal output by the complementary PWM circuit;
• a current combining circuit for combining outputs of the differential current switch circuit;
• and
• a current-to-voltage converter for the converting the current the current combining circuit outputs to voltage.