Single wire digital width modulation for fan control with tachometer feedback

    公开(公告)号:US06563284B2

    公开(公告)日:2003-05-13

    申请号:US09989065

    申请日:2001-11-21

    CPC classification number: G05B11/28 H02P6/085

    Abstract: The present invention relates to a motor drive system which comprises a fan controller circuit operable to generate a PWM control signal for control of a motor speed. The fan controller circuit comprises a current detection circuit and a motor speed determination circuit. The system further comprises a fan driver circuit operable to drive a motor at a duty cycle based on the PWM control signal from the fan controller circuit. The fan driver circuit comprises a current sink circuit operable to draw current from the PWM control signal when the PWM control signal is high and when the motor reaches a predetermined position. In the addition, the current detection circuit is operable to detect the current draw on the PWM control signal and provide an indication signal to the fan speed determination circuit associated with such detection. Further, the motor speed determination circuit is operable to determine the speed of the motor based upon a timing associated with successive current draw detections. The present invention also relates to a method of determining a motor speed which comprises driving a motor at a duty cycle dictated by a PWM control signal and detecting a predetermined rotor position of the motor. The method further comprises generating a current pulse based on the rotor position, wherein the current pulse is convolved with the PWM control signal, detecting the current pulse, and determining the motor speed using successive detected current pulses.

    Discodermolide compounds and methods of use
    262.
    发明授权
    Discodermolide compounds and methods of use 失效
    曲妥珠单抗化合物及其使用方法

    公开(公告)号:US6127406A

    公开(公告)日:2000-10-03

    申请号:US412552

    申请日:1999-10-05

    CPC classification number: A61K31/366

    Abstract: Novel analogs of compounds from the marine sponge Discodermia dissoluta have been prepared. These compounds have been shown to have activity against mammalian cancer cells, and can be used in treating human patients which host cancer cells, including leukemia, melanoma, breast, colon, CNS, renal, ovarian, prostate, and lung tumors.

    Abstract translation: 已经制备了来自海洋海绵的化合物的新型类似物。 已经显示这些化合物具有抗哺乳动物癌细胞的活性,并且可用于治疗宿主癌细胞(包括白血病,黑素瘤,乳腺癌,结肠癌,CNS,肾,卵巢癌,前列腺癌和肺癌)的人类患者。

    Internal voltage protection circuit
    263.
    发明授权
    Internal voltage protection circuit 有权
    内部电压保护电路

    公开(公告)号:US6111737A

    公开(公告)日:2000-08-29

    申请号:US267490

    申请日:1999-03-11

    CPC classification number: H01L27/0251

    Abstract: An internal circuitry protection scheme which protects on-IC circuitry when an external regulator voltage pin is shorted to a higher voltage. The circuit prevents damage to the on-die circuitry that is on the internal voltage rail, by clamping the received voltage, thereby eliminating the chance of damaging the on die circuitry. The circuit offers protection even if the voltage difference is large, but the difference remains small between the internal rail and the external regulated voltage under normal operation.

    Abstract translation: 内部电路保护方案,当外部稳压器电压引脚短路到较高电压时,保护IC内部电路。 该电路通过钳位接收到的电压来防止损坏内部电压轨上的片上电路,从而消除了损坏管芯电路的可能性。 即使电压差大,电路也能提供保护,但在正常工作状态下,内部轨道与外部调节电压之间的差异仍然很小。

    System and method for delivering expert information by computer
    264.
    发明授权
    System and method for delivering expert information by computer 失效
    计算机提供专家信息的系统和方法

    公开(公告)号:US06026148A

    公开(公告)日:2000-02-15

    申请号:US863892

    申请日:1997-05-28

    CPC classification number: H04M11/10 H04M3/493

    Abstract: A computer-based system facilitates exchange of information between users and expert respondents. The users post questions on a topic to a computer bulletin board or forum, using a telephone and modem connection to a remote server. The respondents contact the server by telephone, and receive a list of questions that have been posted. The respondents then dictate answers orally, by telephone, and the answers are recorded and stored by the server as sound files. The stored answers can later be played back by users who connect to the server through their personal computers. The answers can also be transcribed into text files for viewing by the users. Thus, a user can both hear the recorded voice of the respondent and see the stored text of the respondent's answer. The system makes it easy for respondents to answer questions, or provide comments, especially in cases where a respondent is not familiar with computer technology, or where a respondent is not conveniently located near a computer.

    Abstract translation: 基于计算机的系统便于用户和专家受访者之间的信息交换。 用户使用电话和调制解调器连接到远程服务器,将主题的问题提交到计算机公告板或论坛。 受访者通过电话联系服务器,并收到已发布的问题列表。 受访者随后通过电话口头答复,答案由服务器记录和存储为声音文件。 存储的答案可以稍后由通过其个人计算机连接到服务器的用户播放。 答案也可以转录成文本文件供用户观看。 因此,用户既可以听到受访者的记录声音,也可以查看受访者答案的存储文本。 该系统使受访者容易回答问题或提供意见,特别是在受访者不熟悉计算机技术的情况下,或者受访者在计算机附近不方便的地方。

    Secured network system
    265.
    发明授权
    Secured network system 失效
    安全网络系统

    公开(公告)号:US06021497A

    公开(公告)日:2000-02-01

    申请号:US35409

    申请日:1998-02-10

    CPC classification number: H04L63/0853 G06F21/34 G06F21/82

    Abstract: A secured network system which will allow only authorized users of the seed network system to access classified data provided by a secured network server. The secured network system includes a readykey controller which has connected thereto a plurality of card readers. A user of the secured network system inserts a microchip embedded card into one of the card readers which then provides an authorization signal to the readykey controller indicating that the user is authorized to use one of a plurality of computers within the secured network system to receive and process classified data. The readykey controller sends an enable signal to a data relay switch enabling a data line associated with the card reader and the computer selected by the user allowing classified data to be transmitted from the secured network server through the data relay switch to the selected computer. Each of the three computers also has a power relay switch connected thereto which is activated by the readykey controller whenever authorization to activate the computer is provided to the readykey controller from another of the plurality of card readers.

    Abstract translation: 一种安全网络系统,其仅允许安全网络系统的授权用户访问由安全网络服务器提供的分类数据。 安全网络系统包括已经连接有多个读卡器的就绪键控制器。 安全网络系统的用户将微芯片嵌入式卡片插入读卡器之一,然后向就绪键控制器提供授权信号,指示用户被授权使用安全网络系统内的多台计算机之一来接收和 处理分类数据。 就绪键控制器向数据中继交换机发送使能信号,该数据中继交换机启用与读卡器相关联的数据线和由用户选择的计算机,允许分类数据从安全网络服务器通过数据中继交换机发送到所选择的计算机。 三台计算机中的每一台还具有连接到其上的功率继电器开关,每当从多个读卡器中的另一个读卡器向准备键控制器提供激活计算机的授权时,其由就绪键控制器激活。

    Circuit and method for conserving energy in a boost regulator circuit
    266.
    发明授权
    Circuit and method for conserving energy in a boost regulator circuit 失效
    用于节能升压调节器电路的电路和方法

    公开(公告)号:US5808884A

    公开(公告)日:1998-09-15

    申请号:US682946

    申请日:1996-07-16

    CPC classification number: H05B33/08 H02M3/1588 Y02B70/1466

    Abstract: A boost regulator circuit includes a rechargeable power supply Vcc, an energy storage component 22 coupled to the rechargeable power supply, a load C.sub.L, and a bi-directional drive means (S1-S6, 20 and 27) for delivering energy from the energy storage component 22 to the load C.sub.L. The bi-directional drive means allows energy transferred to the load to be recovered back to the rechargeable power supply Vcc before switching the load C.sub.L in an opposite direction, thereby effectuating an efficient management of energy and extending the life of the rechargeable power supply Vcc.

    Abstract translation: 升压调节器电路包括可再充电电源Vcc,耦合到可再充电电源的能量存储组件22,负载CL和用于从能量存储器传送能量的双向驱动装置(S1-S6,20和27) 部件22到负载CL。 双向驱动装置允许传递到负载的能量在相反方向上切换负载CL之前恢复到可再充电电源Vcc,从而实现能量的有效管理并延长可再充电电源Vcc的寿命。

    Asymmetrical, bidirectional triggering ESD structure
    267.
    发明授权
    Asymmetrical, bidirectional triggering ESD structure 失效
    不对称,双向触发ESD结构

    公开(公告)号:US5780905A

    公开(公告)日:1998-07-14

    申请号:US768358

    申请日:1996-12-17

    CPC classification number: H01L27/0262

    Abstract: An ESD protection structure which includes, preferably a single semiconductor chip, a forward SCR for coupling across a source of potential and a reverse SCR for coupling across the same source of potential which is non-symmetrical to the forward SCR. The breakdown voltage of the forward SCR is different from the breakdown voltage of the reverse SCR. Each of the SCRs has a separate triggering mechanism. None of the anode, cathode and triggering elements of the forward SCR are common to the reverse SCR. A unidirectional device, preferably a Schottky diode, is disposed in the body of semiconductor material between the forward and reverse SCRs to prevent conduction from the body of semiconductor material when the source of potential across the SCRs is reversed.

    Abstract translation: 一种ESD保护结构,其优选地包括单个半导体芯片,用于跨越电位源耦合的正向SCR和用于跨过与正向SCR非对称的相同电位源耦合的反向SCR。 正向SCR的击穿电压不同于反向SCR的击穿电压。 每个SCR具有单独的触发机制。 正向SCR的阳极,阴极和触发元件都不是反向SCR共有的。 单向器件(优选肖特基二极管)设置在正向和反向SCR之间的半导体材料体内,以防止当跨越SCR的电位源反向时,半导体材料的主体导电。

    Non-volatile memory in power and linear integrated circuits
    268.
    发明授权
    Non-volatile memory in power and linear integrated circuits 失效
    电力和线性集成电路中的非易失性存储器

    公开(公告)号:US5710515A

    公开(公告)日:1998-01-20

    申请号:US480063

    申请日:1995-06-07

    Abstract: A testable temperature warning circuit (120) in an integrated circuit substrate (124) provides a warning if the substrate temperature exceeds a critical temperature. A programming circuit (140) controls a selection, circuit (128) to establish a programmably selectable temperature at either the critical temperature or a second predetermined temperature lower than the critical temperature to enable the warning circuit operation to be tested at a temperature lower than the critical temperature. In one embodiment, the selection circuit 128 comprises a current source that produces a voltage drop across the resistor 121 and base-emitter of the transistor 122 produces a substrate temperature indicating current of magnitude related to the temperature of the substrate. The substrate temperature indicating current at the second temperature is extrapolatingly related to the substrate temperature indicating current at the critical temperature. A method is also presented for testing a temperature warning circuit fabricated in an integrated circuit substrate.

    Abstract translation: 如果衬底温度超过临界温度,则集成电路衬底(124)中的可测温度警告电路(120)提供警告。 编程电路(140)控制选择电路(128)在临界温度或低于临界温度的第二预定温度下建立可编程选择的温度,以使报警电路操作能够在低于 临界温度。 在一个实施例中,选择电路128包括在电阻器121上产生电压降的电流源,并且晶体管122的基极 - 发射极产生指示与衬底温度相关的电流幅度的衬底温度。 指示在第二温度下的电流的衬底温度与指示临界温度下的电流的衬底温度外推相关。 还提出了一种用于测试在集成电路基板中制造的温度警告电路的方法。

    Apparatus and method for a buffer reservation system
    270.
    发明授权
    Apparatus and method for a buffer reservation system 失效
    一种缓冲区预约系统的装置和方法

    公开(公告)号:US5613073A

    公开(公告)日:1997-03-18

    申请号:US280102

    申请日:1994-07-25

    CPC classification number: H04L47/10 H04L29/06 H04L49/90

    Abstract: An apparatus and method in a data processing system for sending a data packet from a source node to a destination node. The data processing system includes a multi-segment network having at least two segments, wherein the source node and the destination node are located within different segments. Communication of a data packet from one segment to another segment is provided by an agent node. When a receiving node, which may be either an agent or a destination node, cannot accept a packet, it places a reservation tag of "A" or "B" in an echo packet. The retried packet then uses this reservation tag to gain priority for any available buffers in the agent or destination node. The receiving node toggles between accepting all the outstanding "A" packets (when the receiving node is in the "receiving A" state) and accepting all the outstanding "B" packets (when the receiving node is in the "receiving B" state) assuming that the receiving node has a free, unoccupied buffer for accepting the packet. The receiving node counts the number of outstanding "A" reservations and the number of outstanding "B" reservations. Any time the number of available buffers is greater than the number of outstanding "A" packets (when the receiving node is in the receiving "A" state) any "new" packets or "B" packets will be accepted. Analogously, any time the number of available buffers is greater than the number of outstanding "B" packets (when the receiving node is in the receiving "B" state) any "new" packets or "A" packets will be accepted.

    Abstract translation: 一种数据处理系统中用于将数据分组从源节点发送到目的地节点的装置和方法。 数据处理系统包括具有至少两个段的多段网络,其中源节点和目的地节点位于不同的段内。 数据分组从一个分段到另一个分段的通信由代理节点提供。 当可以是代理或目的地节点的接收节点不能接受分组时,它将一个“A”或“B”的预留标签放置在回声分组中。 然后,重试的分组然后使用该预留标签来获得代理或目的地节点中的任何可用缓冲区的优先级。 接收节点在接受所有未完成的“A”分组之间切换(当接收节点处于“接收A”状态时)并接受所有未完成的“B”分组(当接收节点处于“接收B”状态时) 假设接收节点具有用于接受分组的空闲的空闲缓冲器。 接收节点计算未完成的“A”保留数量和未完成的“B”保留数。 任何时候可用缓冲区的数量大于未完成的“A”数据包的数量(当接收节点处于接收“A”状态时)任何“新”数据包或“B”数据包将被接受。 类似地,任何时间可用缓冲器的数量大于未完成的“B”分组的数量(当接收节点处于接收“B”状态时)任何“新”分组或“A”分组将被接受。

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