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    • 1. 发明授权
    • Two piece upper receiver for firearms
    • 两件火器上接收器
    • US08230634B1
    • 2012-07-31
    • US13105893
    • 2011-05-12
    • Robert Bruce DaviesRobert Lynch Hogan
    • Robert Bruce DaviesRobert Lynch Hogan
    • F41A21/00F41A21/48
    • F41A3/66F41C23/16F41G11/003
    • A two piece upper receiver for a firearm including a first piece having a front end, a rear end, a top, and a bottom, the first piece constructed to operatively carry a bolt carrier and bolt, and to have a barrel coupled to the front end. The bottom is constructed to have a lower receiver coupled thereto. The first piece includes a backbone extending along the top between the front end and the rear end, the back bone having upwardly directed indexing surfaces. A second piece overlies the backbone and includes mating surfaces engaging the indexing surfaces, aligning the second piece with the first piece. A receiving structure is opposite the mating surfaces for receiving accessory devices mounted thereon. Fasteners fixedly attach the second piece to the first piece to form a complete upper receiver.
    • 一种用于枪械的两件式上接收器,包括具有前端,后端,顶部和底部的第一件,第一件构造成可操作地承载螺栓承载件和螺栓,并且具有联接到前部的筒 结束。 底部构造成具有与其耦合的较低的接收器。 第一件包括沿着前端和后端之间的顶部延伸的骨架,后骨具有向上指向的分度表面。 第二件覆盖在骨架上并包括与分度表面接合的配合表面,使第二件与第一件对准。 接收结构与配合表面相对,用于接收安装在其上的附件装置。 紧固件将第二件固定在第一件上以形成一个完整的上部接收器。
    • 5. 发明申请
    • ELECTRICAL STRESS PROTECTION APPARATUS AND METHOD OF MANUFACTURE
    • 电力应力保护装置及其制造方法
    • US20080048215A1
    • 2008-02-28
    • US11467452
    • 2006-08-25
    • Robert Bruce Davies
    • Robert Bruce Davies
    • H01L29/80
    • H01L27/0262
    • In various embodiments, circuits and semiconductor devices and structures and methods to manufacture these structures and devices are disclosed. In one embodiment, a bidirectional polarity, voltage transient protection device is disclosed. The voltage transient protection device may include a bipolar PNP transistor having a turn-on voltage of VBE1, a bipolar NPN transistor having a turn-on voltage of VBE2, and a field effect transistor (FET) having a threshold voltage of VTH, wherein a turn-on voltage VTO of the voltage transient protection device is approximately equal to the sum of VBE1, VBE2, and VTH, that is, VTO≅VBE1+VBE2+VTH. Other embodiments are described and claimed.
    • 在各种实施例中,公开了用于制造这些结构和装置的电路和半导体器件及其结构和方法。 在一个实施例中,公开了双向极性电压瞬变保护装置。 电压瞬变保护装置可以包括具有导通电压V BAT1的双极性PNP晶体管,具有导通电压V BE2的双极性NPN晶体管,以及 具有阈值电压V TH TH的场效应晶体管(FET),其中电压瞬变保护装置的导通电压V IN TO TO近似等于 V BE1 ,V BE2和V TH TH,这就是V≅V BE1 < / SUB + + + + + + + + H + 描述和要求保护其他实施例。
    • 10. 发明授权
    • Transistor protection circuit
    • 晶体管保护电路
    • US4021701A
    • 1977-05-03
    • US638879
    • 1975-12-08
    • Robert Bruce Davies
    • Robert Bruce Davies
    • G05F1/573H03F1/52H02H7/20
    • H03F1/52G05F1/573
    • The disclosed protection circuit which is suitable for providing protection of transistors included in integrated circuits such as regulators and power amplifiers, includes thermal shutdown, safe area and current control circuits. The current control portion includes a sense transistor connected substantially in parallel with the transistor to be protected. In monolithic integrated circuit applications, the sense transistor has an emitter area that is a predetermined ratio of the emitter area of the protected transistor. A "sense resistor" is connected to the sense transistor and develops a control signal which is proportional to the instantaneous current being conducted by the protected transistor. A threshold circuit is coupled between the sense resistor and the drive circuit for the protected transistor and responds to the magnitude of the control signal crossing a predetermined threshold to remove or reduce the drive to the protected transistor.
    • 所公开的适用于提供包括在诸如调节器和功率放大器的集成电路中的晶体管的保护的保护电路包括热关断,安全区域和电流控制电路。 电流控制部分包括基本上与要保护的晶体管并联连接的检测晶体管。 在单片集成电路应用中,感测晶体管具有作为受保护晶体管的发射极面积的预定比率的发射极区域。 “感测电阻器”连接到感测晶体管,并产生与受保护晶体管传导的瞬时电流成正比的控制信号。 阈值电路耦合在感测电阻器和用于受保护晶体管的驱动电路之间,并且响应于超过预定阈值的控制信号的大小以去除或减小对受保护晶体管的驱动。