公开(公告)号：KR1020080105977A

公开(公告)日：2008-12-04

申请号：KR1020080016598

申请日：2008-02-25

Applicant: 삼성전자주식회사

Inventor： 고주현 ,  정지운 ,  김종선

IPC: H03M1/66

CPC classification number: H03M1/664 ,  H03M2201/31 ,  H03M2201/62 ,  H03M2201/932 ,  H04N5/202

Abstract: A digital-analog converter and a digital-analog converting method are provided to obtain a nonlinear output characteristic approximated to a gamma curve of an LCD panel. An integrated circuit includes an operational amplifier(251), a first capacitor(Csa), a plurality of second capacitors(270), and a switching circuit(280). The operational amplifier includes a first input terminal, a second input terminal and an output terminal. The first capacitor includes a first terminal and a second terminal. The second terminal is connected to a first input terminal of the operational amplifier. The second capacitor includes the first terminal and the second terminal. The second terminal is connected to the second input terminal of the operational amplifier. The switching circuit includes the plurality of switches which are switched by responding to a corresponding switching signal among the plurality of switching signals. The switching circuit transmits the reference voltage to the first terminal of the first capacitor and the respective first terminals of the second capacitors. The switching circuit connects the first input terminal of the operational amplifier to the output terminal of the operational amplifier. The switching circuit separates the reference voltage from the first terminal of the first capacitor for the second section and transmits the selected voltage of two selection voltage or more to the respective first terminal of the second capacitors. The first terminal of the first capacitor is connected to the output terminal of the operational amplifier.

Abstract translation: 提供数字 - 模拟转换器和数字 - 模拟转换方法以获得近似于LCD面板的伽马曲线的非线性输出特性。 集成电路包括运算放大器（251），第一电容器（Csa），多个第二电容器（270）和开关电路（280）。 运算放大器包括第一输入端，第二输入端和输出端。 第一电容器包括第一端子和第二端子。 第二端子连接到运算放大器的第一输入端。 第二电容器包括第一端子和第二端子。 第二端子连接到运算放大器的第二输入端。 开关电路包括通过响应多个开关信号中的相应开关信号来切换的多个开关。 开关电路将参考电压发送到第一电容器的第一端子和第二电容器的相应的第一端子。 开关电路将运算放大器的第一输入端连接到运算放大器的输出端。 开关电路将参考电压与第二部分的第一电容器的第一端分开，并将所选择的两个选择电压以上的电压发送到第二电容器的相应的第一端。 第一电容器的第一端连接到运算放大器的输出端。