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    Jitter suppression techniques for laser driver circuits
    161.
    发明授权
    Jitter suppression techniques for laser driver circuits 有权
    激光驱动电路的抖动抑制技术

    公开(公告)号：US07035303B2

    公开(公告)日：2006-04-25

    申请号：US10874519

    申请日：2004-06-23

    Applicant: Xin Wang

    Inventor： Xin Wang

    IPC: H01S3/00

    CPC classification number: H04B10/504 ,  H01S5/042 ,  H01S5/0683 ,  H04B10/588

    Abstract: Driver circuits of the present invention provide current to drive laser diodes. The output current of the driver circuit includes a data signal and a low frequency tone signal. The low frequency tone signal is within the bandwidth of a power control feedback loop. The tone signal introduces low frequency noise into the output signal of the driver circuit. The low frequency noise causes jitter at the zero crossing points of the driver circuit output signal. A laser driver circuit of the present invention provides a compensation current to a laser diode. The compensation current is out of phase with the tone signal. The compensation current eliminates the low frequency noise in the output signal of the laser driver circuit.

    Abstract translation: 本发明的驱动电路提供驱动激光二极管的电流。 驱动器电路的输出电流包括数据信号和低频音调信号。 低频音信号在功率控制反馈环路的带宽内。 音调信号将低频噪声引入驱动电路的输出信号。 低频噪声会在驱动电路输出信号的过零点产生抖动。 本发明的激光驱动电路向激光二极管提供补偿电流。 补偿电流与音调信号不同步。 补偿电流消除了激光驱动电路的输出信号中的低频噪声。

    System and method for protecting data files by periodically refreshing a decryption key
    163.
    发明授权
    System and method for protecting data files by periodically refreshing a decryption key 失效
    通过周期性地刷新解密密钥来保护数据文件的系统和方法

    公开(公告)号：US06937726B1

    公开(公告)日：2005-08-30

    申请号：US09468747

    申请日：1999-12-21

    Applicant: Xin Wang

    Inventor： Xin Wang

    IPC: H04L9/08 ,  H04L9/30 ,  H04L9/00 ,  H04K1/00

    CPC classification number: H04L9/0891 ,  H04L9/0897 ,  H04L9/3013 ,  H04L2209/603 ,  H04L2209/76

    Abstract: Methods for transferring among key holders in encoding and cryptographic systems the right to decode and decrypt messages in a way that does not explicitly reveal decoding and decrypting keys used and the original messages. Such methods are more secure and more efficient than typical re-encoding and re-encryption schemes, and are useful in developing such applications as document distribution and long-term file protection.

    Abstract translation: 在编码和加密系统中的密钥持有者之间传送解密和解密消息的方式不以显式解释和解密所使用的密钥和原始消息的方式进行传送的方法。 这样的方法比典型的重新编码和重新加密方案更安全和更有效，并且在开发诸如文档分发和长期文件保护的应用中是有用的。

    Systems and methods for integrity certification and verification of content consumption environments
    164.
    发明授权
    Systems and methods for integrity certification and verification of content consumption environments 有权
    完整性认证和内容消费环境验证的系统和方法

    公开(公告)号：US06931545B1

    公开(公告)日：2005-08-16

    申请号：US09649838

    申请日：2000-08-28

    Applicant: Thanh Ta ,  Xin Wang

    Inventor： Thanh Ta ,  Xin Wang

    IPC: G06Q50/00 ,  G06F21/00 ,  G06F21/22 ,  G06Q10/00 ,  H04L29/06 ,  G06F11/30 ,  G06F12/14 ,  H04L9/00 ,  H04L9/32

    CPC classification number: H04L63/0823 ,  G06F21/10 ,  H04L63/104

    Abstract: A content provider, such as a document publisher or distributor, provides, for example, protected content to a user, for consumption within a trusted user environment. By providing integrity certification and verification services, the authenticity of the content consumption environments can be verified. The content provider forwards to the user a protected version of the digital content which includes, for example, a license agreement and an integrity profile identification. The profile includes, for example, the applications and system components that are allowed to be used in conjunction with the protected content. Additionally, the content provider initiates a request for an integrity profile. This request for the integrity profile is forwarded to an integrity certification and verification device. The integrity certification and verification device can, for example, if an integrity profile does not already exist for the requested applications and/or systems components, query a content consumption system/application provider, who, for example, has supplied the system components to the user. The content consumption system/application provider returns to the integrity certification and verification device authentication information about the particular applications or system components. The authentication information allows a comparison, or integrity verification, to be made between an application and/or system component on a user's system, and the original application or system component as distributed by the content consumption system/application provider.

    Abstract translation: 内容提供商，例如文档发布者或分发者，例如向用户提供受保护的内容，以便在受信任的用户环境内消费。 通过提供完整性认证和验证服务，可以验证内容消费环境的真实性。 内容提供商向用户转发数字内容的受保护版本，其包括例如许可协议和完整性简档标识。 配置文件包括例如允许与受保护内容一起使用的应用程序和系统组件。 此外，内容提供商发起对完整性简档的请求。 该完整性简档的请求被转发到完整性认证和验证设备。 完整性认证和验证设备可以例如如果对于所请求的应用和/或系统组件不存在完整性简档，则查询内容消费系统/应用提供商，例如谁将系统组件提供给 用户。 内容消费系统/应用提供者返回关于特定应用或系统组件的完整性认证和验证设备认证信息。 认证信息允许在用户系统上的应用和/或系统组件与由内容消费系统/应用提供商分发的原始应用或系统组件之间进行比较或完整性验证。

    Method and apparatus for computing dummy feature density for Chemical-Mechanical Polishing
    166.
    发明申请
    Method and apparatus for computing dummy feature density for Chemical-Mechanical Polishing 有权
    用于计算化学机械抛光的虚拟特征密度的方法和装置

    公开(公告)号：US20050114824A1

    公开(公告)日：2005-05-26

    申请号：US10997396

    申请日：2004-11-24

    Applicant: Xin Wang ,  Charles Chiang ,  Jamil Kawa

    Inventor： Xin Wang ,  Charles Chiang ,  Jamil Kawa

    IPC: G06F17/50 ,  G06F19/00

    CPC classification number: G06F17/5068 ,  G06F2217/12 ,  Y02P90/265

    Abstract: One embodiment of the present invention provides a system that computes dummy feature density for a CMP (Chemical-Mechanical Polishing) process. Note that the dummy feature density is used to add dummy features to a layout to reduce the post-CMP topography variation. During operation, the system discretizes a layout of an integrated circuit into a plurality of panels. Next, the system computes a feature density and a slack density for the plurality of panels. The system then computes a dummy feature density for the plurality of panels by, iteratively, (a) calculating an effective feature density for the plurality of panels using the feature density and a function that models the CMP process, (b) calculating a filling amount for a set of panels in the plurality of panels using a target feature density, the effective feature density, and the slack density, and (c) updating the feature density, the slack density, and the dummy feature density for the set of panels using the filling amount. In one embodiment of the present invention, the iterative process is guided by a variance-minimizing heuristic to efficiently select the set of panels and assign/remove dummy density to the set of panels to decrease the effective feature density variation.

    Abstract translation: 本发明的一个实施例提供了一种计算CMP（化学机械抛光）工艺的虚拟特征密度的系统。 请注意，虚拟特征密度用于向布局添加虚拟特征以减少CMP后的拓扑变化。 在操作期间，系统将集成电路的布局离散成多个面板。 接下来，系统计算多个面板的特征密度和松弛密度。 然后，系统通过迭代地计算多个面板的虚拟特征密度，（a）使用特征密度计算多个面板的有效特征密度，以及对CMP过程建模的功能，（b）计算填充量 对于使用目标特征密度，有效特征密度和松弛密度的多个面板中的一组面板，以及（c）更新该组面板的特征密度，松弛密度和虚拟特征密度，使用 填充量。 在本发明的一个实施例中，迭代过程由方差最小化启发式引导，以有效地选择面板集合并且将虚空密度分配/去除到该组面板以减小有效特征密度变化。

    System and method for managing transfer of rights using shared state variables
    167.
    发明申请
    System and method for managing transfer of rights using shared state variables 有权
    使用共享状态变量管理权限转移的系统和方法

    公开(公告)号：US20050060571A1

    公开(公告)日：2005-03-17

    申请号：US10956121

    申请日：2004-10-04

    Applicant: Xin Wang ,  Thanh Ta ,  Guillermo Lao ,  Eddie Chen

    Inventor： Xin Wang ,  Thanh Ta ,  Guillermo Lao ,  Eddie Chen

    IPC: H04L29/06 ,  H04L9/00

    CPC classification number: H04L63/102 ,  G06Q50/184 ,  H04L63/12 ,  H04L2463/101

    Abstract: A method, system and device for transferring rights adapted to be associated with items from a rights supplier to a rights consumer, including obtaining a set of rights associated with an item, the set of rights including meta-rights specifying derivable rights that can be derived from the meta-; determining whether the rights consumer is entitled to the derivable rights specified by the meta-rights; and deriving at least one right from the derivable rights, if the rights consumer is entitled to the derivable rights specified by the meta-rights, wherein the derived right includes at least one state variable based on the set of rights and used for determining a state of the derived right.

    Abstract translation: 一种用于传送权利的方法，系统和装置，其适用于与权利供应商的项目相关联，包括获得与项目相关联的一组权限，所述一组权限包括指定可导出的可导出权限的权利要求 从元 确定权利消费者是否有权享有元权利规定的可衍生权利; 以及如果所述权利消费者有权享有所述元权利规定的可导出权限，则从所述可导出权利得出至少一个权利，其中，所述派生权利基于所述一组权利包括至少一个状态变量并且用于确定该状态 的衍生权。

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