Invention Grant
- Patent Title: Output buffer with offset cancellation structure and offset cancellation method using the same
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Application No.: US14642779Application Date: 2015-03-10
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Publication No.: US09602104B2Publication Date: 2017-03-21
- Inventor: Ming-Wei Hsu , Chern-Lin Chen
- Applicant: Sitronix Technology Corp.
- Applicant Address: TW Hsinchu County
- Assignee: Sitronix Technology Corp.
- Current Assignee: Sitronix Technology Corp.
- Current Assignee Address: TW Hsinchu County
- Agent Winston Hsu; Scott Margo
- Main IPC: H03K19/00
- IPC: H03K19/00 ; H03F3/30 ; H03F3/45 ; G09G3/36
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.
Public/Granted literature
- US20160269027A1 Output Buffer with Offset Cancellation Structure and Offset Cancellation Method Using the Same Public/Granted day:2016-09-15
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