DIGITAL-TO-ANALOG CONVERTER, SOURCE DRIVING CIRCUIT HAVING THE DIGITAL-TO-ANALOG CONVERTER, AND DISPLAY DEVICE HAVING THE SOURCE DRIVING CIRCUIT

摘要

Using the drain current modulation digital-disclosure of a source driver circuit that includes analog converters and them. Digital-to-analog converter is a voltage-to-current converter, a current-mode digital-to-analog converter and an operational amplifier. Voltage-to-current converter to generate a first current signal proportional to the difference between the second voltage signal having a second voltage level and the first voltage signal having a first voltage level. Current-mode digital-to-analog converter generates a second current signal corresponding to the digital input signal in response to the digital input signal and the first current signal. Operational amplifier modulates the drain current in response to the second current signal and the second voltage signal and generates an output voltage with an offset. Thus, the digital-to-analog converter is small, the area occupied by the semiconductor integrated circuit, a digital-to-analog converter to the source driver circuit is less production cost.