Patent ID: 6072413
Filing Date: 2000-06-06
Classification: H03M

Abstract:
A digital-to-analog converter comprising:a plurality of input terminals;an output terminal;a plurality of input signal lines connected to said input terminals, respectively;a plurality of output signal lines;a logic circuit including a plurality of MOS transistors each having a gate connected to one of said input signal lines, a drain connected to a first power supply terminal and a source which has one of a connection state where said source which has one of a connection state where said source is connected to one of said output signal lines and a disconnection state where said source is not connected to said output signal lines;a reference current source including a constant current source and a first transistor connected to said constant current source;a digital-to-analog conversion section including a plurality of second transistors each connected to one of said output signal lines and to said first transistor, each of said second transistors forming a current mirror circuit with said first transistor, and a plurality of third transistors each connected between said output terminal and one of said output signals lines, said first, second and third transistors being bipolar transistors.