System for controlling an inverter through pulse width modulation
    1.
    发明授权
    System for controlling an inverter through pulse width modulation 失效
    通过脉宽调制控制逆变器的系统

    公开(公告)号:US5272430A

    公开(公告)日:1993-12-21

    申请号:US853403

    申请日:1992-03-18

    IPC分类号: H02M7/5387 H02P7/00

    CPC分类号: H02M7/53873

    摘要: A system provides parallel sequences of control signals, each control signal having a determined duration (T), constant within a sequence, and a predetermined duty cycle, specific to the control signal. A microcontroller (20) includes a central processing unit (21) and a non-volatile memory (23) arranged in blocks (Bij) of lines and columns. Each line corresponds to a word containing at least as many bits as parallel sequences. A Direct Memory Access (DMA) controller (24) and an associated counter (25) sequentially address each word of a block at a fixed frequency and supply bits of this word in parallel to produce the parallel control signals.

    摘要翻译: 系统提供并行的控制信号序列,每个控制信号具有对于控制信号特有的确定的持续时间(T),在序列内是恒定的,以及预定的占空比。 微控制器(20)包括以线和列的块(Bij)布置的中央处理单元(21)和非易失性存储器(23)。 每行对应于至少包含与并行序列一样多的位的字。 直接存储器访问(DMA)控制器(24)和关联的计数器(25)以固定的频率顺序地寻址块的每个字,并且并行地提供该字的位以产生并行控制信号。

    Cable modem link layer bridge
    2.
    发明授权
    Cable modem link layer bridge 有权
    电缆调制解调器链路层桥

    公开(公告)号:US06839355B1

    公开(公告)日:2005-01-04

    申请号:US09461672

    申请日:1999-12-14

    CPC分类号: H04L12/4625 H04L12/2801

    摘要: A cable modem link layer bridge includes a downstream forwarding task and an upstream forwarding task. The downstream forwarding task is structured to receive a first message from a cable network and forward the first message to a customer premises equipment (CPE). The upstream forwarding task is structured to receive a second message from the CPE and forward the second message to the cable network, the upstream and downstream forwarding tasks being multitasked such that the second message is forwarded by the upstream forward task while the first message is being forwarded by the downstream forwarding task.

    摘要翻译: 电缆调制解调器链路层桥接器包括下游转发任务和上游转发任务。 下游转发任务被构造成从有线网络接收第一消息并将第一消息转发到客户驻地设备(CPE)。 上游转发任务被构造成从CPE接收第二消息并将第二消息转发到有线网络,上游和下游转发任务是多任务的,使得第二消息由第一消息正在被上游转发任务转发 由下游转发任务转发。

    Network station management system and method
    3.
    发明授权
    Network station management system and method 有权
    网站管理系统及方法

    公开(公告)号:US07308700B1

    公开(公告)日:2007-12-11

    申请号:US09464637

    申请日:1999-12-15

    CPC分类号: H04L41/0213 H04L12/2801

    摘要: A system and method for configuring and managing the connectivity of a broadband, cable modem network station to a network, including a state-driven network manager having a centralized error handling state and peripheral states for initialization, dynamic host configuration, configuration download, start simple-network-management, and an operational state. The operational state monitors for error and other messages communicated from other states and sends error messages to the centralized error-handling state and request messages to an operational support system interface management task. The error handling state receives error messages and requests error event logging from the operational support system interface management task. A change upstream-or-downstream channel task optimizes channel selection. The method includes initializing the network station to a predetermined set of parameters; creating and starting a dynamic-host-configuration protocol task; creating and starting a time-of-day task; creating and starting a configuration download task; creating and starting a simple-network-management protocol task; entering an operational state upon successful initialization of the network station and connectivity with the network, and, while in the operational state, monitoring the tasks for messages, including error messages and task messages; receiving error messages and initiating error recovery in response to the error messages; and receiving request messages and sending request messages to the operational support system interface management task.

    摘要翻译: 一种用于配置和管理宽带电缆调制解调器网络站到网络的连接性的系统和方法,包括具有集中式错误处理状态的状态驱动网络管理器和用于初始化的外围状态,动态主机配置,配置下载,启动简单 网络管理和操作状态。 操作状态监视从其他状态传送的错误信息和其他消息,并将错误消息发送到集中式错误处理状态,并向操作支持系统接口管理任务请求消息。 错误处理状态从操作支持系统接口管理任务接收错误消息并请求错误事件记录。 更改上行或下行通道任务优化通道选择。 该方法包括将网络站初始化为预定的一组参数; 创建和启动动态主机配置协议任务; 创建和开始时间任务; 创建和启动配置下载任务; 创建和启动简单网络管理协议任务; 在成功初始化网络站并与网络连接的同时进入操作状态,并且在操作状态下监视消息的任务,包括错误消息和任务消息; 接收错误消息并响应错误消息启动错误恢复; 并接收请求消息并向操作支持系统接口管理任务发送请求消息。