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    • 3. 发明授权
    • Dark current/channel difference compensated image sensor
    • 暗电流/通道差补偿图像传感器
    • US07639291B2
    • 2009-12-29
    • US11140650
    • 2005-05-27
    • Yan Ping LimRay Alan Mentzer
    • Yan Ping LimRay Alan Mentzer
    • H04N9/64
    • H04N5/361
    • A method for compensating for dark current in an image sensor array. In a representative embodiments, the method includes determining a nominal average dark current for the image sensor array, determining location of each pixel in the image sensor array, obtaining a nominal dark current associated with each pixel based on the nominal average dark current and on the location of the pixel, and subtracting the associated nominal dark current from the image signal for each pixel. At least two of the pixels have differing associated nominal dark currents. In other representative embodiments compensation values for dark currents and for differences in channel processing are determined during the same time period.
    • 一种用于补偿图像传感器阵列中的暗电流的方法。 在代表性实施例中,该方法包括确定图像传感器阵列的标称平均暗电流,确定图像传感器阵列中每个像素的位置,基于标称平均暗电流获得与每个像素相关联的标称暗电流,并且 并且从每个像素的图像信号中减去相关联的标称暗电流。 至少两个像素具有不同的相关联的标称暗电流。 在其他代表性实施例中,在相同的时间段期间确定暗电流的补偿值和信道处理的差异。
    • 7. 发明申请
    • Dim row suppression system and method for active pixel sensor arrays
    • 有源像素传感器阵列的暗行抑制系统和方法
    • US20080117317A1
    • 2008-05-22
    • US11601346
    • 2006-11-17
    • Ray Alan Mentzer
    • Ray Alan Mentzer
    • H04N9/64
    • H04N5/3745H04N5/361
    • An active pixel sensor array includes an imaging sensor subarray, a first reference subarray positioned on a first side of the imaging sensor subarray. The first reference subarray includes a first reference column line. A second reference subarray is positioned on a second side of the imaging subarray. The second reference subarray includes a second reference column line that is electrically coupled to the first reference column line to generate a common reference signal from the first and second reference subarrays. The active pixel sensor array may be a CMOS image sensor and each reference subarray may include a plurality of column lines associated with a plurality of columns of pixels.
    • 有源像素传感器阵列包括成像传感器子阵列,位于成像传感器子阵列的第一侧上的第一参考子阵列。 第一参考子阵列包括第一参考列线。 第二参考子阵列位于成像子阵列的第二侧。 第二参考子阵列包括电耦合到第一参考列线以从第一和第二参考子阵列生成公共参考信号的第二参考列线。 有源像素传感器阵列可以是CMOS图像传感器,并且每个参考子阵列可以包括与多个像素列相关联的多个列线。
    • 9. 发明授权
    • Multistage voltage converter for voltage controlled oscillator
    • 用于压控振荡器的多级电压转换器
    • US5821824A
    • 1998-10-13
    • US920186
    • 1997-08-25
    • Ray Alan Mentzer
    • Ray Alan Mentzer
    • H03B1/00H03F3/45H03K3/0231H03B5/24H03B5/04H03L1/00
    • H03F3/45183H03K3/0231H03B2200/0092H03B2201/02H03F2203/45371H03F2203/45392H03F2203/45646H03F2203/45658
    • A multistage voltage-to-current ("VI") converter for producing, in response to an input voltage, an output voltage useful for controlling a voltage-controlled oscillator ("VCO"). Preferably, the transfer function of the VI converter is such that the output clock frequency-to-input voltage transfer function (of a system including the VI converter and the VCO) is at least approximately linear over a desired output clock frequency range and has a desired slope in such range. In preferred embodiments, the multistage VI converter includes three differential amplifier stages connected in parallel. Each stage has a tail current and receives a reference voltage (the tail currents and reference voltages typically differ from stage to stage), and produces a component of a total current. The total current determines the output voltage. Optionally, bias circuitry is provided for producing nonzero output voltage in response to zero input voltage. In other embodiments, the multistage VI converter includes two stages or more than three stages connected in parallel, each stage producing a component of a total current which determines the output voltage. The number of stages, and the tail current and reference voltage (and resistor values and transistor characteristics) of each stage, are chosen to achieve a desired output voltage-to-input voltage transfer function. Another aspect of the invention is a VCO system including any embodiment of the multistage VI converter of the invention.
    • 用于响应于输入电压产生用于控制压控振荡器(“VCO”)的输出电压的多级电压 - 电流(“VI”)转换器。 优选地,VI转换器的传递函数使得(包括VI转换器和VCO的系统)的输出时钟频率 - 输入电压传递函数在期望的输出时钟频率范围上至少近似线性,并且具有 所需坡度在这样的范围内。 在优选实施例中,多级VI转换器包括并联连接的三个差分放大器级。 每个阶段都有一个尾电流并接收一个参考电压(尾电流和参考电压通常不同于一个阶段),并产生一个总电流的分量。 总电流决定输出电压。 可选地,提供偏置电路用于响应于零输入电压产生非零输出电压。 在其他实施例中,多级VI转换器包括并联连接的两级或三级以上,每级产生确定输出电压的总电流的分量。 选择级数和每级的尾电流和参考电压(和电阻值和晶体管特性)以实现期望的输出电压到输入电压传递函数。 本发明的另一方面是包括本发明的多级VI转换器的任何实施例的VCO系统。