DIFFERENTIAL DIGITAL-TO-ANALOG CONVERTER USING COMPLEMENTARY CHARACTERISTICS

摘要

PURPOSE: A differential digital-to-analog converter using the complementary characteristic is provided to reduce unnecessary power consumption and whole system size by omitting a secondary circuit forming a differential phase clock. CONSTITUTION: A current supplying unit(100) includes one current source. The current supplying unit supplies a current corresponding to the output of a digital-to-analog converter by forming a p-type metal-oxide-semiconductor transistor with a current mirror. A current distributing unit(200) distributes a current from the current supplying unit into a plurality of distributed currents. A switching unit(300) controls the flow of the distributed currents. An impedance buffering unit(400) minimizes a current variation according to the switching operation of a switching unit. A voltage outputting unit(500) generates an outputting voltage by adding distributed currents.