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    • 62. 发明授权
    • Method of forming a region of graded doping concentration in a semiconductor device and related apparatus
    • 在半导体器件和相关装置中形成渐变掺杂浓度区域的方法
    • US08207578B2
    • 2012-06-26
    • US13156184
    • 2011-06-08
    • William FrenchErika MazottiYuri Mirgorodski
    • William FrenchErika MazottiYuri Mirgorodski
    • H01L29/78
    • H01L29/0847H01L21/2253H01L29/0653H01L29/1045H01L29/66659H01L29/7835
    • A method for forming a doped region of a semiconductor device includes masking a portion of a substrate with a mask. The mask is configured to create a graded doping profile within the doped region. The method also includes performing an implant using the mask to create doped areas and undoped areas in the substrate. The method further includes diffusing the doped areas to create the graded doping profile in the doped region. The mask could include a first region having openings distributed throughout a photo-resist material, where the openings vary in size and spacing. The mask could also include a second region having blocks of photo-resist material distributed throughout an open region, where the photo-resist blocks vary in size and spacing. Diffusing the doped areas could include applying a high temperature anneal to smooth the doped and undoped areas to produce a linearly graded doping profile.
    • 用于形成半导体器件的掺杂区域的方法包括用掩模掩蔽衬底的一部分。 掩模被配置为在掺杂区域内产生渐变掺杂分布。 该方法还包括使用掩模执行植入物以在衬底中产生掺杂区域和未掺杂区域。 该方法还包括扩散掺杂区域以在掺杂区域中产生渐变掺杂分布。 掩模可以包括具有分布在整个光致抗蚀剂材料中的开口的第一区域,其中开口的尺寸和间隔变化。 掩模还可以包括具有分布在整个开放区域中的光致抗蚀剂材料块的第二区域,其中光刻胶块的尺寸和间距变化。 扩散掺杂区域可以包括施加高温退火以使掺杂和未掺杂区域平滑以产生线性渐变的掺杂分布。
    • 65. 发明申请
    • SYSTEM AND METHOD FOR PROVIDING AN ACTIVE CURRENT ASSIST WITH ANALOG BYPASS FOR A SWITCHER CIRCUIT
    • 用于为切换电路提供模拟旁路的有源电流辅助系统和方法
    • US20120105032A1
    • 2012-05-03
    • US13344428
    • 2012-01-05
    • Jeffry Mark Huard
    • Jeffry Mark Huard
    • G05F1/10
    • H02M3/158H02M2003/1566
    • A system and method are disclosed for providing an active current assist with analog bypass for a switcher circuit. An active current assist circuit is coupled to a buck regulator circuit, which includes a switcher circuit, an inductor circuit and a capacitor circuit. The active current assist circuit includes an active current analog bypass control circuit and a current source. The active current analog bypass control circuit receives and uses current limit information, voltage error information, and drop out information to determine a value of assist current that is appropriate for a current operational state of the buck regulator circuit. The active current analog bypass control circuit causes the current source to provide the appropriate value of assist current to the buck regulator circuit.
    • 公开了一种用于为切换器电路提供模拟旁路的有源电流辅助的系统和方法。 有源电流辅助电路耦合到降压调节器电路,其包括开关电路,电感器电路和电容器电路。 有源电流辅助电路包括有源电流模拟旁路控制电路和电流源。 有源电流模拟旁路控制电路接收并使用限流信息,电压误差信息和丢失信息,以确定适合于降压调节器电路的当前工作状态的辅助电流值。 有源电流模拟旁路控制电路使得电流源向降压调节器电路提供适当的辅助电流值。
    • 68. 发明申请
    • Combined digital modulation and current dimming control for light emitting diodes
    • 用于发光二极管的组合数字调制和电流调光控制
    • US20120086701A1
    • 2012-04-12
    • US12925030
    • 2010-10-12
    • Ari K. VäänänenMauri K. MäättäT. Tapani Tuikkanen
    • Ari K. VäänänenMauri K. MäättäT. Tapani Tuikkanen
    • G06F3/038
    • H05B33/0848G09G3/3406G09G2320/0633G09G2320/064G09G2320/0653G09G2360/144
    • A method includes providing an input signal identifying a desired brightness for one or more LEDs to first and second parallel control paths. The method also includes generating a digital modulation control signal using the first control path, generating a current control signal using the second control path, and driving the one or more LEDs using the control signals. The method further includes performing compensation in at least one of the control paths to compensate for an increased efficiency of the one or more LEDs. Generating the control signals could include (i) adjusting the digital modulation control signal while maintaining the current control signal at a substantially constant value for a range of lower LED brightness values and (ii) adjusting the current control signal while maintaining the digital modulation control signal at a maximum value or within a range of maximum values for a range of higher LED brightness values.
    • 一种方法包括向第一和第二并行控制路径提供将一个或多个LED标识期望亮度的输入信号。 该方法还包括使用第一控制路径产生数字调制控制信号,使用第二控制路径产生电流控制信号,以及使用控制信号驱动一个或多个LED。 该方法还包括在至少一个控制路径中执行补偿以补偿一个或多个LED的增加的效率。 产生控制信号可以包括:(i)调节数字调制控制信号,同时将电流控制信号保持在较低LED亮度值的范围内基本上恒定的值,以及(ii)在保持数字调制控制信号的同时调节电流控制信号 在最大值或在更高的LED亮度值的范围的最大值的范围内。