公开(公告)号：US5635935A

公开(公告)日：1997-06-03

申请号：US522011

申请日：1995-08-31

申请人： James S. Ignowski ,  Hugh Wallace ,  Stuart A. Bell

发明人： James S. Ignowski ,  Hugh Wallace ,  Stuart A. Bell

IPC分类号： H03M1/66 ,  H03M1/00 ,  H03M1/74

CPC分类号： H03M1/002 ,  H03M1/742

摘要： A video DAC for driving video displays with reduced power dissipation is presented. This is accomplished using a dual driver circuit connected to a current mirror, the dual driver comprising a strong driver and a weak driver. The dual driver permits switching current between the video load and a dummy load. The current to the dummy load is disabled during periods when the video signal remains steady for a predetermined period of time. The dual driver, using the weak driver, disables the current to the dummy load during video blanking and synchronization periods. This scheme substantially reduces the power dissipation in the DAC.

摘要翻译： 提出了一种用于驱动具有降低功耗的视频显示的视频DAC。 这是使用连接到电流镜的双驱动器电路实现的，双驱动器包括强驱动器和弱驱动器。 双驱动器允许在视频负载和虚拟负载之间切换电流。 在视频信号保持稳定一段预定时间段期间，禁止对虚拟负载的电流。 使用弱驱动器的双驱动器在视频消隐和同步期间禁用当前的虚拟负载。 该方案大大降低了DAC中的功耗。

公开(公告)号：US20070266288A1

公开(公告)日：2007-11-15

申请号：US11435064

申请日：2006-05-15

申请人： Erik Volkerink ,  Hugh Wallace ,  Klaus-Dieter Hilliges ,  Ajay Khoche ,  Jochen Rivoir

发明人： Erik Volkerink ,  Hugh Wallace ,  Klaus-Dieter Hilliges ,  Ajay Khoche ,  Jochen Rivoir

IPC分类号： G01R31/28

CPC分类号： G01R31/31907

摘要： An adaptive test system includes one or more reconfigurable test boards, with each test board including at least one re-configurable test processor. The re-configurable test processors can transmit communicate with one another using an inter-processor communications controller associated with each re-configurable test processor. The communications include configuration information, control information, communication protocols, stimulus data, and responses. Configuration information and stimulus data can also be read from a memory. Configuration information is used to configure one or more re-configurable test processors. Once configured, the re-configurable test processor or processors process the data in order to generate one or more test signals. The one or more test signals are then used to test a DUT.

摘要翻译： 自适应测试系统包括一个或多个可重新配置的测试板，每个测试板包括至少一个可重新配置的测试处理器。 可重新配置的测试处理器可以使用与每个可重新配置的测试处理器相关联的处理器间通信控制器彼此进行通信。 通信包括配置信息，控制信息，通信协议，刺激数据和响应。 还可以从存储器读取配置信息和激励数据。 配置信息用于配置一个或多个可重新配置的测试处理器。 一旦配置，可重新配置的测试处理器或处理器处理数据，以产生一个或多个测试信号。 然后使用一个或多个测试信号来测试DUT。

公开(公告)号：US06737858B2

公开(公告)日：2004-05-18

申请号：US10099618

申请日：2002-03-14

申请人： Jeff Rearick ,  Hugh Wallace

发明人： Jeff Rearick ,  Hugh Wallace

IPC分类号： G01R3128

CPC分类号： G01R31/3191 ,  G01R31/3004 ,  G01R31/31715 ,  G01R31/31924 ,  G01R31/40

摘要： Method and apparatus of testing current sinking and sourcing capability of a driver in an IC calls for positioning a charge storage element at an output of the driver and charging it to a known voltage value. A pulse of known duration and voltage level is applied to an input of the driver and a resulting voltage value is measured at the output of the driver. A current flow through the driver is determined to be within testing limits by comparing an expected voltage value against the resulting voltage value. An apparatus for testing current sinking and sourcing capacity of a driver in an IC has the driver with a charge storage element of known or measurable capacitive value at an output of the driver. An input circuit permits application of a test pulse of known duration and data input values to the driver. A receiver accepts an output of the driver for determining a threshold voltage value at the driver output.

摘要翻译： 测试IC中驱动器的当前下沉和取样能力的方法和装置要求将电荷存储元件定位在驱动器的输出端并将其充电到已知的电压值。 将已知持续时间和电压电平的脉冲施加到驱动器的输入端，并且在驱动器的输出处测量所得到的电压值。 通过将预期电压值与所得到的电压值进行比较，将驱动器的电流确定在测试限制内。用于测试IC中驱动器的当前吸收和供电能力的装置具有已知的电荷存储元件的驱动器 或在驾驶员的输出处的可测量的电容值。 输入电路允许向驱动器施加已知持续时间的测试脉冲和数据输入值。 接收器接受驱动器的输出，以确定驱动器输出端的阈值电压值。

公开(公告)号：US06621483B2

公开(公告)日：2003-09-16

申请号：US09810745

申请日：2001-03-16

申请人： Hugh Wallace ,  Gary B. Gordon

发明人： Hugh Wallace ,  Gary B. Gordon

IPC分类号： G09G500

CPC分类号： G06F3/038 ,  G06F3/0317 ,  G06F3/03547 ,  H01L27/14678

摘要： An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes an imaging surface against which a portion of the tip of a human digit may be placed. A light source illuminates that portion of the tip of the digit that is placed against the imaging surface, thereby generating reflected images. The apparatus includes a motion transducer. A lens receives the reflected images and directs the reflected images onto the motion transducer. The motion transducer generates digital representations of the reflected images. The motion transducer generates a first set of movement data based on the digital representations of the reflected images. The first set of movement data is indicative of motion of the tip of the digit across the imaging surface. A controller generates a second set of movement data when the tip of the human digit is removed from the imaging surface. The second set of movement data is indicative of motion of the tip of the digit across the imaging surface prior to removal of the tip.

公开(公告)号：US07184026B2

公开(公告)日：2007-02-27

申请号：US09812252

申请日：2001-03-19

申请人： Gary B. Gordon ,  Hugh Wallace

发明人： Gary B. Gordon ,  Hugh Wallace

IPC分类号： G09G5/00

CPC分类号： G06F3/044 ,  G06F3/03547 ,  G06F2203/0338 ,  H01L27/14678

摘要： An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a plurality of sensing elements against which a portion of the tip of a human digit may be placed. A controller coupled to each of the sensing elements senses an electrical property at each of the sensing elements. The controller is configured to generate pixel values representing the portion of the tip of the digit placed against the sensing elements based on the sensed electrical property at each of the sensing elements, and generate movement data based on a comparison of successively generated sets of the pixel values. The comparison includes comparing a first one of the sets with at least one pixel shifted version of a second one of the sets. The movement data is indicative of motion of the tip of the digit across the sensing elements.

摘要翻译： 用于控制具有显示屏的电子设备的屏幕指针的位置的装置包括多个感测元件，可以放置人物的尖端的一部分。 耦合到每个感测元件的控制器感测每个感测元件处的电气特性。 控制器被配置为基于在每个感测元件处感测到的电特性来产生表示放置在感测元件上的数字的尖端的部分的像素值，并且基于连续生成的像素集合的比较来生成运动数据 价值观。 比较包括将集合中的第一组与集合中的第二组的至少一个像素移位版本进行比较。 运动数据表示穿过感测元件的数字尖端的运动。

公开(公告)号：US06737636B2

公开(公告)日：2004-05-18

申请号：US10453391

申请日：2003-06-03

申请人： Zachary Dietz ,  Charles E Moore ,  Hugh Wallace

发明人： Zachary Dietz ,  Charles E Moore ,  Hugh Wallace

IPC分类号： G01J350

CPC分类号： G06F3/0317

摘要： Optical navigation upon grainy surfaces whose orientation is inclined at about 45° to the X and Y axes of the navigation mechanism is enhanced by: First, detect that a spatial filter in use is inappropriate for the orientation presently occurring, and; Second, employ a different and more appropriate spatial filter subsequent to such detection. Two spatial filters have been developed that are respectively effective about the 45° and 135° inclinations of the Standard filter. The shape of a correlation surface used in the navigation process is tested for the presence of a transverse ridge in the correlation surface. This generates control metrics whose filtered excursions are tracked by a control system that changes the spatial filter in use. The control system incorporates a time constant to prevent thrashing and excessive sensitivity to isolated random variations. The direction from which illumination arrives relative to the X and Y axes affects the range of angles (relative to, say, the Y axis) that a filter is effective, by changing the apparent size and proportions of the highlights and shadows that are the perceived features ultimately navigated upon. Stable operation of the control system can be enhanced by ensuring overlap of the filters' ranges, and can be promoted by dynamically altering the direction from which illumination reaches the navigation surface, so that it corresponds to, or varies in relation with, the filter in use.

摘要翻译： 通过以下方式增强了定位与导航机构的X轴和Y轴倾斜约45°的粒状表面上的光学导航：首先，检测使用中的空间滤波器对于当前发生的取向是不合适的; 其次，在这种检测之后采用不同的和更适当的空间滤波器。 已经开发了两个空间滤波器，分别对标准滤波器的45°和135°倾角有效。 在相关表面中测试在导航过程中使用的相关表面的形状，以确定横向脊的存在。 这产生控制度量，其过滤偏移由控制系统跟踪，该控制系统改变使用中的空间滤波器。 控制系统包含一个时间常数，以防止对孤立的随机变化的抖动和过度敏感。 相对于X和Y轴照明到达的方向影响滤光器有效的角度（相对于Y轴）的范围，通过改变被感知的高光和阴影的表观尺寸和比例 功能最终导航。 可以通过确保滤波器范围的重叠来增强控制系统的稳定操作，并且可以通过动态地改变照明到达导航表面的方向来促进，使得其对应于或相应于滤波器的变化 使用。

公开(公告)号：US06603111B2

公开(公告)日：2003-08-05

申请号：US09845544

申请日：2001-04-30

申请人： Zachary Dietz ,  Charles E Moore ,  Hugh Wallace

发明人： Zachary Dietz ,  Charles E Moore ,  Hugh Wallace

IPC分类号： G01J350

CPC分类号： G06F3/0317

摘要： Optical navigation upon grainy surfaces whose orientation is inclined at about 45° to the X and Y axes of the navigation mechanism is enhanced by: First, detect that a spatial filter in use is inappropriate for the orientation presently occurring, and; Second, employ a different and more appropriate spatial filter subsequent to such detection. Two spatial filters have been developed that are respectively effective about the 45° and 135° inclinations of the Standard filter. The shape of a correlation surface used in the navigation process is tested for the presence of a transverse ridge in the correlation surface. This generates control metrics whose filtered excursions are tracked by a control system that changes the spatial filter in use. The control system incorporates a time constant to prevent thrashing and excessive sensitivity to isolated random variations. The direction from which illumination arrives relative to the X and Y axes affects the range of angles (relative to, say, the Y axis) that a filter is effective, by changing the apparent size and proportions of the highlights and shadows that are the perceived features ultimately navigated upon. Stable operation of the control system can be enhanced by ensuring overlap of the filters' ranges, and can be promoted by dynamically altering the direction from which illumination reaches the navigation surface, so that it corresponds to, or varies in relation with, the filter in use.

摘要翻译： 通过以下方式增强了定位与导航机构的X轴和Y轴倾斜约45°的粒状表面上的光学导航：首先，检测使用中的空间滤波器对于当前发生的取向是不合适的; 其次，在这种检测之后采用不同的和更适当的空间滤波器。 已经开发了两个空间滤波器，分别对标准滤波器的45°和135°倾角有效。 在相关表面中测试在导航过程中使用的相关表面的形状，以确定横向脊的存在。 这产生控制度量，其过滤偏移由控制系统跟踪，该控制系统改变使用中的空间滤波器。 控制系统包含一个时间常数，以防止对孤立的随机变化的抖动和过度敏感。 相对于X和Y轴照明到达的方向影响滤光器有效的角度（相对于Y轴）的范围，通过改变被感知的高光和阴影的表观尺寸和比例 功能最终导航。 可以通过确保滤波器范围的重叠来增强控制系统的稳定操作，并且可以通过动态地改变照明到达导航表面的方向来促进，使得其对应于或相应于滤波器的变化 使用。