公开(公告)号：US09602104B2

公开(公告)日：2017-03-21

申请号：US14642779

申请日：2015-03-10

Applicant: Sitronix Technology Corp.

Inventor： Ming-Wei Hsu ,  Chern-Lin Chen

IPC: H03K19/00 ,  H03F3/30 ,  H03F3/45 ,  G09G3/36

CPC classification number: H03K19/0027 ,  G09G3/3688 ,  G09G2310/0291 ,  H03F3/3022 ,  H03F3/3023 ,  H03F3/45183 ,  H03F3/45192 ,  H03F3/45246 ,  H03F3/45475 ,  H03F3/45744 ,  H03F3/45968 ,  H03F2203/45212

Abstract: An output buffer with an offset cancellation structure for an LCD source driver includes an operational amplifier, for driving an output signal of the output buffer according to a data signal from a data input terminal of the output buffer; a reference voltage generator, for generating a reference voltage and inputting the reference voltage to the operational amplifier; and a sampling capacitor, coupled between a second input terminal of the operational amplifier and the data input terminal of the output buffer in a first phase, and coupled between the second input terminal of the operational amplifier and an output terminal of the operational amplifier in a second phase, wherein the second input terminal of the operational amplifier is further coupled to the output terminal of the operational amplifier in the first phase. The output signal outputs the data signal where the offset voltage is cancelled in the second phase.

公开(公告)号：US20160269027A1

公开(公告)日：2016-09-15

申请号：US14642779

申请日：2015-03-10

Applicant: Sitronix Technology Corp.

Inventor： Ming-Wei Hsu ,  Chern-Lin Chen

IPC: H03K19/00 ,  H03F1/02 ,  H03F3/45 ,  G09G3/36

CPC classification number: H03K19/0027 ,  G09G3/3688 ,  G09G2310/0291 ,  H03F3/3022 ,  H03F3/3023 ,  H03F3/45183 ,  H03F3/45192 ,  H03F3/45246 ,  H03F3/45475 ,  H03F3/45744 ,  H03F3/45968 ,  H03F2203/45212

Abstract: An output buffer with an offset cancellation structure for an LCD source driver includes an operational amplifier, for driving an output signal of the output buffer according to a data signal from a data input terminal of the output buffer; a reference voltage generator, for generating a reference voltage and inputting the reference voltage to the operational amplifier; and a sampling capacitor, coupled between a second input terminal of the operational amplifier and the data input terminal of the output buffer in a first phase, and coupled between the second input terminal of the operational amplifier and an output terminal of the operational amplifier in a second phase, wherein the second input terminal of the operational amplifier is further coupled to the output terminal of the operational amplifier in the first phase. The output signal outputs the data signal where the offset voltage is cancelled in the second phase.

Abstract translation: 具有用于LCD源驱动器的偏移消除结构的输出缓冲器包括运算放大器，用于根据来自输出缓冲器的数据输入端的数据信号来驱动输出缓冲器的输出信号; 参考电压发生器，用于产生参考电压并将所述参考电压输入到所述运算放大器; 以及采样电容器，其以第一相耦合在所述运算放大器的第二输入端和所述输出缓冲器的数据输入端之间，并且耦合在所述运算放大器的第二输入端和所述运算放大器的输出端之间 第二相，其中运算放大器的第二输入端在第一阶段进一步耦合到运算放大器的输出端。 输出信号输出在第二阶段取消偏移电压的数据信号。