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    • 1. 发明授权
    • Nanopillar arrays for electron emission
    • 用于电子发射的纳米柱阵列
    • US07884324B2
    • 2011-02-08
    • US12130103
    • 2008-05-30
    • Robert H. BlickMichael S. WestphallHua QinLloyd M. Smith
    • Robert H. BlickMichael S. WestphallHua QinLloyd M. Smith
    • G01N23/00G01N13/10H01J49/08
    • H01J1/32H01J29/023H01J43/246Y10S977/762
    • The present invention provides systems, devices, device components and structures for modulating the intensity and/or energies of electrons, including a beam of incident electrons. In some embodiments, for example, the present invention provides nano-structured semiconductor membrane structures capable of generating secondary electron emission. Nano-structured semiconductor membranes of this aspect of the present invention include membranes having an array of nanopillar structures capable of providing electron emission for amplification, filtering and/or detection of incident radiation, for example secondary electron emission and/or field emission. Nano-structured semiconductor membranes of the present invention are useful as converters wherein interaction of incident primary electrons and nanopillars of the nanopillar array generates secondary emission. Nano-structured semiconductor membranes of this aspect of the present invention are also useful as directed charge amplifiers wherein secondary emission from a nanopillar array provides gain functionality for increasing the intensity of radiation comprising incident electrons.
    • 本发明提供了用于调制包括入射电子束的电子的强度和/或能量的系统,装置,器件组件和结构。 在一些实施例中,例如,本发明提供能够产生二次电子发射的纳米结构的半导体膜结构。 本发明该方面的纳米结构半导体膜包括具有能够提供用于放射,滤波和/或检测入射辐射的电子发射的纳米柱结构阵列的膜,例如二次电子发射和/或场发射。 本发明的纳米结构半导体膜可用作其中纳米柱阵列的入射一次电子和纳米柱的相互作用产生二次发射的转换器。 本发明该方面的纳米结构半导体膜也可用作定向电荷放大器,其中来自纳米柱阵列的二次发射提供了用于增加包括入射电子的辐射强度的增益功能。
    • 6. 发明授权
    • Dial pulse detection method and apparatus
    • 拨号脉冲检测方法和装置
    • US3935392A
    • 1976-01-27
    • US434013
    • 1974-01-17
    • Lloyd M. SmithRobert E. Webb
    • Lloyd M. SmithRobert E. Webb
    • H04Q1/32H04Q1/36
    • H04Q1/32
    • Apparatus and method for detecting the occurrence of a dial pulse signal in a telephone circuit. Transient signals within the frequency range of possible dial pulse signals are detected, and the amplitude of the detected signals are compared with a predetermined amplitude level. A first time period and a second time period are initiated in response to a first detected signal which exceeds a certain initial reference amplitude, with the duration of the first time period being less than the interval between the two consecutive transient pulse signals to be expected of a true dial pulse signal. The duration of the second time period is substantially equal to the period of a true dial pulse signal. A received signal resembling a dial pulse signal is detected during the first period only if the amplitude of such signal exceeds a second reference amplitude which is greater than the initial reference amplitude. A second apparent dial pulse transient signal condition, occurring after the termination of the first time period but before the termination of the second time period, is interpreted as the occurrence of a true dial pulse signal, in response to which a corresponding dial pulse output signal is produced. A second apparent dial pulse transient signal condition occurring in the first time period, however, merely extends the duration of the first time period and provides no dial pulse output signal. An amplitude comparison circuit automatically adjusts the reference amplitude in response to the signal level of the circuit providing input signals to the apparatus.
    • 用于检测电话电路中拨号脉冲信号的发生的装置和方法。 检测可能的拨号脉冲信号的频率范围内的瞬态信号,并将检测到的信号的幅度与预定的振幅电平进行比较。 响应于超过某一初始参考幅度的第一检测信号开始第一时间段和第二时间段,其中第一时间段的持续时间小于预期的两个连续瞬态脉冲信号之间的间隔 真正的拨号脉冲信号。 第二时间段的持续时间基本上等于真实拨号脉冲信号的周期。 只有当这种信号的幅度超过大于初始参考幅度的第二参考幅度时,才在第一周期期间检测到类似于拨号脉冲信号的接收信号。 在第一时间段结束之后但在第二时间段结束之前发生的第二表观拨号脉冲瞬态信号条件被解释为真实拨号脉冲信号的发生,响应于此,对应的拨号脉冲输出信号 生产。 然而,在第一时间段中发生的第二表观拨号脉冲瞬态信号条件仅延长了第一时间段的持续时间并且不提供拨号脉冲输出信号。 振幅比较电路响应于向设备提供输入信号的电路的信号电平自动调整参考幅度。