Invention Grant
US08476971B2 Buffer operational amplifier with self-offset compensator and embedded segmented DAC for improved linearity LCD driver
有权
具有自偏置补偿器和嵌入式分段DAC的缓冲运算放大器,用于改进线性LCD驱动器
- Patent Title: Buffer operational amplifier with self-offset compensator and embedded segmented DAC for improved linearity LCD driver
- Patent Title (中): 具有自偏置补偿器和嵌入式分段DAC的缓冲运算放大器,用于改进线性LCD驱动器
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Application No.: US12889492Application Date: 2010-09-24
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Publication No.: US08476971B2Publication Date: 2013-07-02
- Inventor: Yung-Chow Peng , Wen-Shen Chou , Ching-Ho Chang , Wan-Te Chen
- Applicant: Yung-Chow Peng , Wen-Shen Chou , Ching-Ho Chang , Wan-Te Chen
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Duane Morris LLP
- Main IPC: G06G7/12
- IPC: G06G7/12

Abstract:
A driver utilizes selective biasing of the terminal of an operational amplifier to reduce offset in the operational amplifier output. Each operational amplifier input includes a differential input pair of transistors including a NMOS transistor and PMOS transistor. At low and high ends of the input voltage range these transistors are selectively and individually coupled to either a standard input or biased to be on so as to contribute offset for offset compensation. The transistors are biased in a conventional manner for input voltages between the low and high ends of the voltage range.
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