知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

15 条记录 (耗时 0.045 秒)

    Pulse width modulation circuits and methods
    2.
    发明授权
    Pulse width modulation circuits and methods 有权
    脉宽调制电路及方法

    公开(公告)号：US08144760B2

    公开(公告)日：2012-03-27

    申请号：US12024759

    申请日：2008-02-01

    申请人： Philip Yee

    发明人： Philip Yee

    IPC分类号： H03K7/08 ,  H03K9/08

    CPC分类号： H03K7/08

    摘要： Noise reducing circuitry may be included in a pulse width modulation circuit. The pulse width modulation circuit may include a comparator adapted to receive an analog signal and a sawtooth signal and to compare such signals to generate a pulse width output. In general, the noise reducing circuitry may include a sawtooth signal generating circuit configured to generate a sawtooth signal including an up ramp and a sawtooth signal including a down ramp. A control circuit may be coupled to the sawtooth signal generating circuit for controlling the sawtooth signal generating circuit based on whether a relatively narrow or relatively wide pulse width is to be output by the pulse width modulation circuit. Methods for reducing noise in a pulse width modulation circuit may generally involve dynamically controlling a direction of ramp of a sawtooth signal that is to be input to the comparator of the pulse width modulation circuit.

    摘要翻译： 减噪电路可以包括在脉宽调制电路中。 脉冲宽度调制电路可以包括适于接收模拟信号和锯齿波信号的比较器，并且比较这样的信号以产生脉冲宽度输出。 通常，噪声降低电路可以包括锯齿波信号产生电路，其被配置为产生包括上斜坡的锯齿波信号和包括下降斜坡的锯齿波信号。 控制电路可以耦合到锯齿波信号发生电路，用于基于脉宽调制电路是否输出相对较窄或相对宽的脉冲宽度来控制锯齿波信号产生电路。 用于降低脉冲宽度调制电路中的噪声的方法通常可以包括动态地控制要输入到脉宽调制电路的比较器的锯齿波信号的斜坡方向。

    PULSE WIDTH MODULATION CIRCUITS AND METHODS
    4.
    发明申请
    PULSE WIDTH MODULATION CIRCUITS AND METHODS 有权
    脉宽调制电路及方法

    公开(公告)号：US20090196337A1

    公开(公告)日：2009-08-06

    申请号：US12024759

    申请日：2008-02-01

    申请人： Philip Yee

    发明人： Philip Yee

    IPC分类号： H03K9/08 ,  H03K7/08

    CPC分类号： H03K7/08

    摘要： Noise reducing circuitry may be included in a pulse width modulation circuit. The pulse width modulation circuit may include a comparator adapted to receive an analog signal and a sawtooth signal and to compare such signals to generate a pulse width output. In general, the noise reducing circuitry may include a sawtooth signal generating circuit configured to generate a sawtooth signal including an up ramp and a sawtooth signal including a down ramp. A control circuit may be coupled to the sawtooth signal generating circuit for controlling the sawtooth signal generating circuit based on whether a relatively narrow or relatively wide pulse width is to be output by the pulse width modulation circuit. Methods for reducing noise in a pulse width modulation circuit may generally involve dynamically controlling a direction of ramp of a sawtooth signal that is to be input to the comparator of the pulse width modulation circuit.

    摘要翻译： 减噪电路可以包括在脉宽调制电路中。 脉冲宽度调制电路可以包括适于接收模拟信号和锯齿波信号的比较器，并且比较这样的信号以产生脉冲宽度输出。 通常，噪声降低电路可以包括锯齿波信号产生电路，其被配置为产生包括上斜坡的锯齿波信号和包括下降斜坡的锯齿波信号。 控制电路可以耦合到锯齿波信号发生电路，用于基于是否由脉宽调制电路输出相对较窄或相对宽的脉冲宽度来控制锯齿波信号发生电路。 用于降低脉冲宽度调制电路中的噪声的方法通常可以包括动态地控制要输入到脉宽调制电路的比较器的锯齿波信号的斜坡方向。

    Intelligent soft start for switching regulators
    9.
    发明申请
    Intelligent soft start for switching regulators 有权
    开关稳压器的智能软启动

    公开(公告)号：US20070090817A1

    公开(公告)日：2007-04-26

    申请号：US11259671

    申请日：2005-10-26

    申请人： Philip Yee

    发明人： Philip Yee

    IPC分类号： G05F1/00

    CPC分类号： G05F1/468 ,  H02M1/36 ,  H02M3/156

    摘要： A circuit, method, and system for intelligently soft starting switching regulators are provided. The circuit, method, and system provide for a switching circuit operable to couple an input voltage to an output of the switching regulator in response to a control signal, a controller operable to generate the control signal to control the switching of the switching circuit based in part on a reference voltage, and a soft start circuit operable to provide the reference voltage to the controller responsive to the switching of the switching circuit.

    摘要翻译： 提供了一种用于智能软启动开关稳压器的电路，方法和系统。 电路，方法和系统提供了可操作以响应于控制信号将输入电压耦合到开关稳压器的输出的开关电路，可操作以产生控制信号以控制开关电路的切换的控制器 以及软启动电路，其可操作以响应于开关电路的切换向控制器提供参考电压。

    Contaminated liquids filtering apparatus
    10.
    发明申请
    Contaminated liquids filtering apparatus 审中-公开
    污染液体过滤装置

    公开(公告)号：US20060081518A1

    公开(公告)日：2006-04-20

    申请号：US10965973

    申请日：2004-10-15

    申请人： Philip Yee ,  Skipper Yee

    发明人： Philip Yee ,  Skipper Yee

    IPC分类号： B01D35/147

    CPC分类号： B01D29/055 ,  B01D29/52 ,  B01D29/54 ,  B01D29/925 ,  B01D2201/0453

    摘要： A filtering apparatus comprising an elongate container body, an inlet, an inlet reservoir, an outlet, an outlet reservoir, and at least two filter elements, wherein each filter units contains two or more space-apart and co-axially stacked filter elements encased in a cylindrical-shaped filter cartridge. Contaminated fluid flows from the inlet, through the perforations located on the inlet reservoir separator, and into the elongate container body. Fluid flows into the filter units through perforations in the filter cartridge and the open ends of the filter cartridge. The filter units use an opposed axial flow method to draw the fluid through the filter elements. The filtered fluid flows through a perforation in the axial conduit, passes through the axial conduit outlet into the outlet reservoir. The filtered fluid then exits through the outlet. The present invention may be used in operation with a motor and pump to filter large flow rates and volumes of contaminated fluid.

    摘要翻译： 一种过滤装置，包括细长的容​​器体，入口，入口容器，出口，出口储存器和至少两个过滤器元件，其中每个过滤器单元包含两个或更多个空间分离和同轴堆叠的过滤元件， 一个圆柱形的滤芯。 受污染的流体从入口流过位于入口储存器分离器上的穿孔，并进入细长的容器体内。 流体通过滤筒中的穿孔和滤筒的开口端流入过滤器单元。 过滤器单元使用相对的轴向流动方法来吸取流体通过过滤元件。 过滤的流体流过轴向导管中的穿孔，通过轴向导管出口进入出口储存器。 过滤的液体然后通过出口离开。 本发明可以与马达和泵一起使用以过滤大流量和污染流体的体积。