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    • 3. 发明授权
    • High-pressure discharge lamp lighting apparatus system
    • 高压放电灯照明装置系统
    • US6163115A
    • 2000-12-19
    • US322031
    • 1999-05-28
    • Akio Ishizuka
    • Akio Ishizuka
    • H05B41/282H05B41/288H05B41/38H05B41/392G05F1/00
    • H05B41/386H05B41/288H05B41/2882H05B41/392Y02B20/204
    • A lamp voltage detecting section detects the lamp voltage of the high-pressure discharge lamp and transmits it to a current calculating section. A lamp current detecting section detects the lamp current of the high-pressure discharge lamp and transmits it to a differential amplification circuit. A target power value to be supplied to the high-pressure discharge lamp is input to the current calculating section from a target setting device. The current calculating section divides the target power value by the lamp voltage detected by the lamp voltage detecting section to calculate a target current value, and transmits the target current value to the differential amplification circuit. A control section controls the chopping operation of a semiconductor switch so as to make the target current value approximate to the lamp current value. A capacitor of a timer circuit is charged with a current correlating with the target power value simultaneously with the operation of the target power setting device, and discharging is executed when the high-pressure discharge lamp is turned off. When the operation is started, the target power setting device sets the target power value on the basis of the charging voltage of the capacitor, and allows the target power value to be varied in response to the duration of operations.
    • 灯电压检测部分检测高压放电灯的灯电压并将其发送到电流计算部。 灯电流检测部分检测高压放电灯的灯电流并将其发送到差分放大电路。 供给高压放电灯的目标功率值从目标设定装置输入到当前计算部。 电流计算部根据由灯电压检测部检测出的灯电压对目标功率值进行分压,计算目标电流值,并将目标电流值发送到差分放大电路。 控制部分控制半导体开关的斩波操作,以使目标电流值接近灯电流值。 定时器电路的电容器与目标功率设定装置的操作同时与目标功率值相关的电流充电,并且当高压放电灯关闭时执行放电。 当操作开始时,目标功率设定装置基于电容器的充电电压来设定目标功率值,并且允许目标功率值根据操作持续时间而改变。
    • 4. 发明授权
    • Method of automatic wiring
    • 自动接线方法
    • US5757089A
    • 1998-05-26
    • US449278
    • 1995-05-24
    • Akio Ishizuka
    • Akio Ishizuka
    • H01L21/82G06F17/50H01L23/528G06F15/00
    • G06F17/5077H01L23/528H01L2924/0002
    • To prevent obstacles to wiring caused when wiring from other nets pass through the vicinity of a terminal, and moreover, to carry out automatic wiring having shorter wiring length and increased wiring completion rate, when calculating wiring costs of a wiring route of a net, for unwired terminals belonging to other nets, wiring route cost values for the net to be wired are variably assigned depending on distance from these terminals. In other words, in the present invention, cost values are established such that the cost weighting decreases with distance from unwired terminals of other nets. Seen from a different viewpoint, in the present invention, cost values are established such that cost increases for wiring routes passing within a prescribed range of an unwired terminal of another net. Incorporation of the above-described set cost value into the calculation of wiring costs enables automatic wiring that reduces cost, shortens wiring length, and prevents occurrence of unwired nets.
    • 为了防止从其他网络的布线通过终端附近引起的布线障碍,此外,为了进行布线长度短,布线完成率提高的自动布线,在计算网布线路线的布线成本时,为 属于其他网络的无线终端,根据与这些终端的距离,可变地分配要布线的布线路线成本值。 换句话说,在本发明中,建立了成本值,使得成本加权随着与其他网络的未被终端的距离而减小。 从不同的观点出发,在本发明中,建立了成本值,使得在另一网的未穿线终端的规定范围内通过的布线路线的成本增加。 将上述设定成本值并入布线成本的计算中,能够实现降低成本的自动布线,缩短布线长度,并且防止未织网的发生。
    • 8. 发明授权
    • Method for designing an interconnection route in an LSI
    • 在LSI中设计互连路由的方法
    • US5717600A
    • 1998-02-10
    • US667482
    • 1996-06-24
    • Akio Ishizuka
    • Akio Ishizuka
    • G06F17/50G06F15/00
    • G06F17/5077
    • A method for designing an interconnection route in an LSI includes steps of finding a minimum-cost path among possible paths for a current net, the possible paths overlapping with existing nets routed before the current net. A unit cost assigned to a grid for scoring possible paths includes a length cost and a rip-up and reroute cost for ripping-up and rerouting the existing nets overlapping with the current net in the grid. The rip-up and reroute cost is not scored, however, when the existing nets also overlaps with the current net in another grid so far routed. The route will be possibly selected in a path overlapping with a several wire segments of a single existing net rather than overlapping with a single segment of each of a plurality of existing nets. Number of rip-up and reroute procedure is reduced so that the speed of routing process is improved, providing a lower cost for routing an interconnection route in a computer.
    • 在LSI中设计互连路由的方法包括在当前网络的可能路径之间找到最小成本路径的步骤,可能的路径与当前网络之前路由的现有网络重叠。 分配给电网的单位成本用于评分可能的路径包括长度成本和撕裂和重新路由现有网络与网格中当前网络重叠的成本和重新路由成本。 然而,当现有网络与目前网络中的当前网络重叠时,RIP和RIP的成本并不高。 该路线可能以与单个现有网络的几个线段重叠的路径来选择,而不是与多个现有网络中的每一个的单个段重叠。 减少和重新路由程序的数量,从而提高了路由过程的速度,为计算机中路由互连路由提供了较低的成本。