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    • 1. 发明授权
    • LCD driver
    • 液晶驱动
    • US08648779B2
    • 2014-02-11
    • US12582107
    • 2009-10-20
    • Fu-Lung HsuehYung-Chow PengKuo-Liang Deng
    • Fu-Lung HsuehYung-Chow PengKuo-Liang Deng
    • G09G5/00G09G3/36
    • G09G3/3688G09G2310/027G09G2320/02G09G2330/021
    • A method includes outputting a first signal from a first DAC decoder circuit in response to receiving a first number of bits of a digital control signal, outputting a second signal from a second DAC decoder circuit in response to receiving a second number of bits of the digital control signal, and alternately outputting one of the first and second signals to an LCD column from a buffer coupled to the first and second DAC decoder circuits. The first signal has a voltage level equal to one of a first plurality of voltage levels received at one of a first plurality of inputs of the first DAC decoder circuit. The second signal has a voltage level equal to one of a second plurality of voltage levels received at one of a second plurality of inputs of the second DAC decoder circuit.
    • 一种方法包括响应于接收数字控制信号的第一位数而输出来自第一DAC解码器电路的第一信号,响应于接收到数字控制信号的第二位数而从第二DAC解码器电路输出第二信号 并且从耦合到第一和第二DAC解码器电路的缓冲器交替地将第一和第二信号之一输出到LCD列。 第一信号具有等于在第一DAC解码器电路的第一多个输入端之一处接收的第一多个电压电平之一的电压电平。 第二信号具有等于在第二DAC解码器电路的第二多个输入端之一处接收的第二多个电压电平之一的电压电平。
    • 5. 发明授权
    • Current-controlled oscillator (CCO) based PLL
    • 基于电流控制振荡器(CCO)的PLL
    • US08432204B1
    • 2013-04-30
    • US13344637
    • 2012-01-06
    • Chan-Hong ChernMing-Chieh HuangTao Wen ChungChih-Chang LinYuwen SweiFu-Lung Hsueh
    • Chan-Hong ChernMing-Chieh HuangTao Wen ChungChih-Chang LinYuwen SweiFu-Lung Hsueh
    • H03L7/06
    • H03L7/102H03L7/099H03L7/104
    • A PLL circuit includes a phase frequency detector; a programmable charge pump coupled to an output of the phase frequency detector; a loop filter coupled to an output of the charge pump, the loop filter providing a fine tuning voltage; a first voltage-to-current converter, the first voltage-to-current converter providing a fine tuning current corresponding to the fine tuning voltage; a current-controlled oscillator (CCO); a feedback divider coupled to an output of the CCO and an input of the phase frequency detector; and an analog calibration circuit. The analog calibration circuit provides a coarse adjustment current for coarse adjustments to a frequency pivot point for an oscillator frequency of the CCO, wherein the CCO generates a frequency signal at an output responsive to a summed coarse adjustment and fine tuning current, wherein the frequency pivot point is continuously adjustable.
    • PLL电路包括相位检波器; 耦合到所述相位频率检测器的输出的可编程电荷泵; 耦合到电荷泵的输出的环路滤波器,所述环路滤波器提供微调电压; 第一电压 - 电流转换器,第一电压 - 电流转换器提供对应于微调电压的微调电流; 电流控制振荡器(CCO); 耦合到CCO的输出的反馈分压器和相位频率检测器的输入端; 和模拟校准电路。 模拟校准电路提供用于对CCO的振荡器频率的频率枢转点进行粗调整的粗调电流,其中CCO响应于总和的粗调和微调电流而在输出端产生频率信号,其中频率枢轴 点连续可调。
    • 10. 发明授权
    • Circuit and method for a digital process monitor
    • 数字过程监控的电路和方法
    • US08183910B2
    • 2012-05-22
    • US12495024
    • 2009-06-30
    • Shine ChungFu-Lung Hsueh
    • Shine ChungFu-Lung Hsueh
    • H01L35/00H01L37/00H03K3/42H03K17/78
    • G01R31/3004G01R31/31703
    • A circuit and method for a digital process monitor is disclosed. Circuits for comparing a current or voltage to a current or voltage corresponding to a device having process dependent circuit characteristics are disclosed, having converters for converting current or voltage measurements proportional to the process dependent circuit characteristic to a digital signal and outputting the digital signal for monitoring. The process dependent circuit characteristics may be selected from transistor threshold voltage, transistor saturation current, and temperature dependent quantities. Calibration is performed using digital techniques such as digital filtering and digital signal processing. The digital process monitor circuit may be formed as a scribe line circuit for wafer characterization or placed in an integrated circuit die as a macro. The process monitor circuit may be accessed using probe pads or scan test circuitry. Methods for monitoring process dependent characteristics using digital outputs are disclosed.
    • 公开了一种用于数字处理监视器的电路和方法。 公开了用于将电流或电压与对应于具有过程相关电路特性的器件相对应的电流或电压进行比较的电路,具有用于将与过程相关的电路特性成比例的电流或电压测量值转换为数字信号的转换器,并输出用于监测的数字信号 。 处理相关电路特性可以选自晶体管阈值电压,晶体管饱和电流和温度依赖量。 使用数字滤波和数字信号处理等数字技术进行校准。 数字处理监视电路可以形成为用于晶片表征的划线电路或者作为宏放置在集成电路管芯中。 可以使用探针焊盘或扫描测试电路来访问过程监控电路。 公开了使用数字输出来监视与过程有关的特性的方法。