专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US6138193A System for reducing noise in bus having plurality of first and second set of signals and a delay device for delaying propagation of second signals 失效
标题翻译：用于减少具有多个第一和第二组信号的总线中的噪声的系统和用于延迟第二信号的传播的延迟装置
公开(公告)号：US6138193A
公开(公告)日：2000-10-24
申请号：US103356
申请日：1998-06-23
申请人： Scott W. Dalton , Stephen D. Burleigh , Michael W. Edwards , Kenneth J. Haugen
发明人： Scott W. Dalton , Stephen D. Burleigh , Michael W. Edwards , Kenneth J. Haugen
IPC分类号： G06F13/40 , G06F13/00
CPC分类号： G06F13/4068
摘要： An apparatus supports both (1) a cost-effective graphics device (such as an AGP device) integrated onto the motherboard, and (2) an upgradable computer system with an add-in card slot for receiving a second graphics device (such as a second AGP device) on a card. The apparatus is connected to a bus that has a first set of signals which is sensitive to noise. The apparatus also has a first switch connected to a first device, the first switch being connected to the first set of signals on the bus. The apparatus has a second switch which is adapted to be connected to a second device. The second switch is also connected to the first set of signals on the bus. The apparatus also has a detector connected to the first and second switches to enable the first switch if the first device is selected and otherwise enable the second switch.
摘要翻译：一种装置支持（1）集成到主板上的具有成本效益的图形设备（例如AGP设备），以及（2）具有附加卡槽的可升级计算机系统，用于接收第二图形设备（例如第二AGP设备）。该装置连接到具有对噪声敏感的第一组信号的总线。该装置还具有连接到第一装置的第一开关，第一开关连接到总线上的第一组信号。该装置具有适于连接到第二装置的第二开关。第二个开关也连接到总线上的第一组信号。该装置还具有连接到第一和第二开关的检测器，以便如果选择了第一装置，则能够进行第一开关，否则启用第二开关。

2. 发明授权

US5424673A LCD display precharge regulator circuit 失效
标题翻译： LCD显示预充电调节电路
公开(公告)号：US5424673A
公开(公告)日：1995-06-13
申请号：US188527
申请日：1994-01-28
申请人： Michael W. Edwards , Scott W. Dalton
发明人： Michael W. Edwards , Scott W. Dalton
IPC分类号： G09G3/36 , H01J19/82
CPC分类号： G09G3/36
摘要： An LCD precharge regulator circuit providing current directly from the input battery voltage to precharge the LCD display. A first switch activates a precharge regulator coupled to the unregulated DC input voltage, to supply the power for the initial current surge from the DC input to charge the LCD display. The precharge regulator includes a transistor and a biasing circuit. The biasing circuit initially turns the transistor fully on, but increasingly biases the transistor off as the LCD display charges to just below the operating voltage of the LCD display. A delay circuit activates a second switch after the LCD display is substantially charged, where the second switch connects the supply voltage from the DC/DC converter to the LCD display. At that point, the transistor is biased off, isolating the LCD display from the DC input voltage. Thus, the supply voltage need only sustain the charge on the LCD display after being substantially charged. Low power series resistors are provided to serve as a fuse, which fail to an open circuit condition, isolating the LCD display from high input voltage levels in the event of excessive current flowing into an overvoltage Zener diode.
摘要翻译： LCD预充电调节器电路直接从输入电池电压提供电流，以预充电液晶显示器。第一开关激活耦合到未调节的DC输入电压的预充电调节器，以从DC输入端提供用于初始电流浪涌的功率以对LCD显示器充电。预充电调节器包括晶体管和偏置电路。偏置电路最初将晶体管全部导通，但随着LCD显示器充电到刚刚低于LCD显示器的工作电压，晶体管将逐渐偏离晶体管。在LCD显示器基本上被充电之后，延迟电路激活第二开关，其中第二开关将来自DC / DC转换器的电源电压连接到LCD显示器。此时，晶体管被偏置，将LCD显示屏与直流输入电压隔离。因此，在充电之后，电源电压仅需维持LCD显示器上的电荷。提供低功率串联电阻，作为不能开路的保险丝，在过电流流入过压齐纳二极管的情况下，将LCD显示屏与高输入电压电平隔离。

3. 发明授权

US5771028A Identification of liquid crystal display panels 失效
公开(公告)号：US5771028A
公开(公告)日：1998-06-23
申请号：US525338
申请日：1995-09-07
申请人： Scott W. Dalton , Doyne L. Metz
发明人： Scott W. Dalton , Doyne L. Metz
IPC分类号： G09G3/18 , G09G3/20 , G09G3/36 , G09G5/00
CPC分类号： G09G5/006 , G09G2370/04 , G09G2370/042 , G09G3/3611
摘要： A method that identifies the type of LCD panel used in a portable computer system based on the frequency of the oscillator signal of the DC-to-AC inverter in the LCD panel. In this method, only one signal is routed from the LCD panel to the base unit of the portable computer system for the purpose of panel identification. The inverter oscillating signal is used to increment a counter during power on operations. A system counter, which is clocked by a system clock, is used to determine the number of system clocks needed for the panel identification counter to reach a predetermined count. That number is compared with the entries of a table, in which each entry corresponds to a type of LCD panel. In this manner, the type of LCD panel can be identified based on the frequency of the inverter signal. A corresponding entry in a second table is accessed to obtain a table entry for the identified LCD panel to a full table of LCD panel parameters. The table entry is stored in a predetermined location in the Video ROM. During the video power on portion of the BIOS, the video BIOS routines access the predetermined location in the Video ROM to obtain the parameters to properly initialize the video controller.

4. 发明授权

US5748902A Polarity switched data bus for reduced electromagnetic interference 失效
标题翻译：极性切换数据总线，减少电磁干扰
公开(公告)号：US5748902A
公开(公告)日：1998-05-05
申请号：US684536
申请日：1996-07-19
申请人： Scott W. Dalton , Todd D. Podhaisky
发明人： Scott W. Dalton , Todd D. Podhaisky
IPC分类号： H04L25/08 , H04L25/34 , H04L25/49
CPC分类号： H04L25/085
摘要： In a data bus with m data bits, electromagnetic interference is produced by polarity switching the data on that data bus. When two consecutive data items result in a change of over half of the data bits, the polarity of the second data item is switched, and a polarity signal is correspondingly switched on the data bus. When the data is received, it is restored to its original polarity by adjusting the polarity of the received data according to the signal on the polarity line. In this way, the total number of bit transitions between any two data items is reduced to a maximum of m/2.
摘要翻译：在具有m个数据位的数据总线中，通过极性切换该数据总线上的数据来产生电磁干扰。当两个连续数据项导致数据位的一半以上的变化时，第二数据项的极性被切换，并且相应地在数据总线上切换极性信号。当接收到数据时，根据极性线上的信号调整接收数据的极性，恢复原来的极性。以这种方式，任何两个数据项之间的位转换总数减少到最大m / 2。

5. 发明授权

US5495263A Identification of liquid crystal display panels 失效
标题翻译：液晶显示面板的识别
公开(公告)号：US5495263A
公开(公告)日：1996-02-27
申请号：US188522
申请日：1994-01-28
申请人： Scott W. Dalton , Doyne L. Metz
发明人： Scott W. Dalton , Doyne L. Metz
IPC分类号： G09G3/18 , G09G3/20 , G09G3/36 , G09G5/00
CPC分类号： G09G5/006 , G09G2370/04 , G09G2370/042 , G09G3/3611
摘要： A method that identifies the type of LCD panel used in a portable computer system based on the frequency of the oscillator signal of the DC-to-AC inverter in the LCD panel. In this method, only one signal is routed from the LCD panel to the base unit of the portable computer system for the purpose of panel identification. The inverter oscillating signal is used to increment a counter during power on operations. A system counter, which is clocked by a system clock, is used to determine the number of system clocks needed for the panel identification counter to reach a predetermined count. That number is compared with the entries of a table, in which each entry corresponds to a type of LCD panel. In this manner, the type of LCD panel can be identified based on the frequency of the inverter signal. A corresponding entry in a second table is accessed to obtain a table entry for the identified LCD panel to a full table of LCD panel parameters. The table entry is stored in a predetermined location in the Video ROM. During the video power on portion of the BIOS, the video BIOS routines access the predetermined location in the Video ROM to obtain the parameters to properly initialize the video controller.
摘要翻译：基于LCD面板中的DC-AC逆变器的振荡器信号的频率，识别在便携式计算机系统中使用的LCD面板的类型的方法。在这种方法中，为了面板识别的目的，只有一个信号从LCD面板路由到便携式计算机系统的基本单元。逆变器振荡信号用于在上电操作期间增加一个计数器。由系统时钟计时的系统计数器用于确定面板识别计数器达到预定计数所需的系统时钟数。该数字与表的条目进行比较，其中每个条目对应于LCD面板的类型。以这种方式，可以基于逆变器信号的频率来识别LCD面板的类型。访问第二表中的相应条目以获得用于所识别的LCD面板的表条目到LCD面板参数的完整表。表条目存储在视频ROM中的预定位置。在BIOS的视频通电部分期间，视频BIOS例程访问视频ROM中的预定位置以获得参数以适当地初始化视频控制器。

6. 发明授权

US06442067B1 Recovery ROM for array controllers 有权
标题翻译：阵列控制器的恢复ROM
公开(公告)号：US06442067B1
公开(公告)日：2002-08-27
申请号：US09576849
申请日：2000-05-23
申请人： Rohit Chawla , Scott W. Dalton
发明人： Rohit Chawla , Scott W. Dalton
IPC分类号： G11C1604
CPC分类号： G06F9/4401 , G06F8/654 , G06F11/1433
摘要： A computer system has a ROM device containing two separately flashed areas. Each area contains a firmware image. From the factory, the two firmware images are identical. Each image also contains the executable code to flash an image area. The ROM also contains a “boot block” sector that makes decisions as to which of the firmware images is the “active” image and which is the “inactive” image. The active image is copied from the ROM to a RAM device and executed from RAM during normal system operation. The inactive image normally is not executed. The boot block sector also contains code that performs a checksum verification on the active image during initialization and, if the checksum fails, switches the active/inactive status of the two firmware images to make the previously inactive image the active image. With two firmware images, the system can recover from a power failure occurring while flashing the ROM because the other firmware image is still available.
摘要翻译：计算机系统具有包含两个分开闪烁区域的ROM设备。每个区域都包含固件映像。从工厂出发，两个固件图像是一样的。每个图像还包含闪存图像区域的可执行代码。 ROM还包含一个“引导块”扇区，用于决定哪个固件映像是“活动”映像，哪个是“非活动”映像。活动图像从ROM复制到RAM设备，并在正常系统操作期间从RAM执行。通常不执行非活动图像。启动块扇区还包含在初始化期间对活动映像执行校验和验证的代码，并且如果校验和失败，则切换两个固件映像的活动/非活动状态，以使先前无效的映像成为活动映像。使用两个固件映像，系统可以在闪烁ROM时发生电源故障，因为其他固件映像仍然可用。

7. 发明授权

US5493203A Low quiescent current voltage regulator 失效
标题翻译：低静态电流稳压器
公开(公告)号：US5493203A
公开(公告)日：1996-02-20
申请号：US376129
申请日：1995-01-19
申请人： Scott W. Dalton
发明人： Scott W. Dalton
IPC分类号： G05F1/445 , G05F1/44
CPC分类号： G05F1/445
摘要： A low quiescent current voltage regulator particularly suited for providing current to the RTC/CMOS memory section of a notebook computer. The gate of the JFET is grounded, the drain connected to the main battery and the source connected to the RTC voltage input of the RTC/CMOS memory section. The JFET source voltage approaches the gate-source cutoff voltage of the JFET. This cutoff voltage is selected to be in the proper range for the RTC/CMOS memory section. A complete RTC voltage control circuit is configured to provide 5 volts from the system voltage when the computer is turned on, 3 to 5 volts from the JFET when the computer is turned off and the main battery is present and 3 volts from the RTC battery when the computer is turned off and the main battery is removed.
摘要翻译：一种低静态电流稳压器，特别适用于向笔记本电脑的RTC / CMOS存储器部分提供电流。 JFET的栅极接地，漏极连接到主电池，源极连接到RTC / CMOS存储器部分的RTC电压输入。 JFET源极电压接近JFET的栅极 - 源极截止电压。该截止电压被选择在RTC / CMOS存储器部分的适当范围内。完整的RTC电压控制电路被配置为当计算机打开时从系统电压提供5伏特，当计算机关闭并且存在主电池并且来自RTC电池的电压为3伏时，从JFET 3至5伏特计算机已关闭，主电池已取出。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式