Oscillator for providing oscillation signal with controllable frequency
    5.
    发明授权
    Oscillator for providing oscillation signal with controllable frequency 有权
    用于提供具有可控频率的振荡信号的振荡器

    公开(公告)号:US07863993B1

    公开(公告)日:2011-01-04

    申请号:US12206448

    申请日:2008-09-08

    IPC分类号: H03B5/36 H03C3/22

    摘要: An oscillator, including amplifier circuitry and resonant circuitry, for providing an oscillation signal with a controllable frequency while maintaining a substantially constant steady state magnitude. Controllable reactive circuitry, included as part of the amplifier circuitry, has a reactance which can be controlled such that the resistive components of the amplifier circuitry and resonant circuitry impedances remain substantially equal. When in the form of serially coupled, controllable capacitances, the controllable reactive circuitry is controlled such that a ratio of changes in the controllable capacitances is approximately equal to a negative ratio of the capacitance values.

    摘要翻译: 包括放大器电路和谐振电路的振荡器,用于在保持基本恒定的稳态幅度的同时提供具有可控频率的振荡信号。 作为放大器电路的一部分包括的可控无功电路具有可以被控制的电抗,使得放大器电路和谐振电路阻抗的电阻分量保持基本相等。 当以串联耦合的可控电容的形式,可控电抗被控制使得可控电容的变化比大致等于电容值的负比。

    Isolated communication bus and related protocol
    6.
    发明授权
    Isolated communication bus and related protocol 有权
    隔离通讯总线及相关协议

    公开(公告)号:US08380905B2

    公开(公告)日:2013-02-19

    申请号:US12800770

    申请日:2010-05-21

    IPC分类号: G06F13/00 G06F13/36

    CPC分类号: G06F13/4256 G06F13/4072

    摘要: A system includes a master device and multiple slave devices. The system also includes multiple bus interfaces forming a communication bus that couples the master and slave devices. Each bus interface includes a primary interface unit configured to communicate over first and second buses, where the first and second buses form a portion of the communication bus. Each bus interface also includes a secondary interface unit configured to communicate with the primary interface unit and to communicate with one of the slave devices over a third bus. Each bus interface further includes an isolator configured to electrically isolate the primary interface unit and the secondary interface unit. The primary interface unit is configured to receive multiple commands over the first bus, execute a first subset of commands, transmit a second subset of commands over the second bus, and transmit a third subset of commands over the third bus.

    摘要翻译: 系统包括主设备和多个从设备。 该系统还包括形成连接主设备和从设备的通信总线的多个总线接口。 每个总线接口包括被配置为通过第一和第二总线通信的主接口单元,其中第一和第二总线形成通信总线的一部分。 每个总线接口还包括辅助接口单元,其被配置为与主接口单元通信并且通过第三总线与一个从设备通信。 每个总线接口还包括隔离器,其被配置为将主接口单元和次接口单元​​电隔离。 主接口单元被配置为通过第一总线接收多个命令,执行命令的第一子集,通过第二总线发送命令的第二子集,以及通过第三总线发送命令的第三子集。

    Isolated communication bus and related protocol
    7.
    发明申请
    Isolated communication bus and related protocol 有权
    隔离通讯总线及相关协议

    公开(公告)号:US20110289248A1

    公开(公告)日:2011-11-24

    申请号:US12800770

    申请日:2010-05-21

    IPC分类号: G06F13/36 G06F13/00

    CPC分类号: G06F13/4256 G06F13/4072

    摘要: A system includes a master device and multiple slave devices. The system also includes multiple bus interfaces forming a communication bus that couples the master and slave devices. Each bus interface includes a primary interface unit configured to communicate over first and second buses, where the first and second buses form a portion of the communication bus. Each bus interface also includes a secondary interface unit configured to communicate with the primary interface unit and to communicate with one of the slave devices over a third bus. Each bus interface further includes an isolator configured to electrically isolate the primary interface unit and the secondary interface unit. The primary interface unit is configured to receive multiple commands over the first bus, execute a first subset of commands, transmit a second subset of commands over the second bus, and transmit a third subset of commands over the third bus.

    摘要翻译: 系统包括主设备和多个从设备。 该系统还包括形成连接主设备和从设备的通信总线的多个总线接口。 每个总线接口包括被配置为通过第一和第二总线通信的主接口单元,其中第一和第二总线形成通信总线的一部分。 每个总线接口还包括辅助接口单元,其被配置为与主接口单元通信并且通过第三总线与一个从设备通信。 每个总线接口还包括隔离器,其被配置为将主接口单元和次接口单元​​电隔离。 主接口单元被配置为通过第一总线接收多个命令,执行命令的第一子集,通过第二总线发送命令的第二子集,以及通过第三总线发送命令的第三子集。

    Method and apparatus for noise bandwidth reduction in wireless communication signal reception
    9.
    发明授权
    Method and apparatus for noise bandwidth reduction in wireless communication signal reception 有权
    无线通信信号接收中噪声带宽降低的方法和装置

    公开(公告)号:US06683919B1

    公开(公告)日:2004-01-27

    申请号:US09334077

    申请日:1999-06-16

    IPC分类号: H03K900

    摘要: A wireless communication system (e.g., GSM) receiver including analog (e.g., analog channel select) and digital filters, and bandwidth control circuitry which operates during at least one mode (e.g., a synchronization mode) to effectively narrow the combined pass band of the analog and digital filters thus reducing the bandwidth of noise passing therethrough, and a method for reducing noise pass band (preferably by data rotation) in at least one mode (e.g., a synchronization mode) but not all modes of wireless communication system receiver. Preferably,the bandwidth control circuitry passes through the output of an analog-to-digital converter (indicative of data) to the digital filter during at least one operating mode, and the bandwidth control circuitry rotates the data in the complex domain (during at least one other mode) before the data is digitally filtered. Rotation of the data is equivalent to rotation of the digital filter pass band, so that (during synchronization) the combined pass band of the analog and digital filters is effectively narrowed but is still sufficiently wide to include the frequency of a frequency correction burst. By performing data rotation in the complex domain, noise bandwidth reduction can be accomplished with simple logic circuitry configured to perform simple logic operations.

    摘要翻译: 包括模拟(例如,模拟通道选择)和数字滤波器的无线通信系统(例如,GSM)接收机以及在至少一种模式(例如,同步模式)下操作的带宽控制电路,以有效地缩小 模拟和数字滤波器,从而降低通过其中的噪声的带宽,以及用于在至少一种模式(例如,同步模式)中降低噪声通带(优选地通过数据旋转)而不是所有模式的无线通信系统接收机的方法。 优选地,带宽控制电路在至少一个操作模式期间通过模数转换器(指示数据)的输出到数字滤波器,并且带宽控制电路使得复杂域中的数据(至少在 数据被数字滤波之前的另一个模式)。 数据的旋转等效于数字滤波器通带的旋转,使得(在同步期间),模拟和数字滤波器的组合通带被有效地变窄,但是仍然足够宽以包括频率校正突发的频率。 通过在复杂域中执行数据旋转,可以通过配置为执行简单逻辑运算的简单逻辑电路来实现噪声带宽降低。