Particle-counting apparatus with pulse shortening
    1.
    发明授权
    Particle-counting apparatus with pulse shortening 有权
    带脉冲缩短的粒子计数装置

    公开(公告)号:US08415635B2

    公开(公告)日:2013-04-09

    申请号:US12682269

    申请日:2008-10-09

    IPC分类号: H01L27/146

    CPC分类号: G01T1/171

    摘要: A particle-counting apparatus is described, which reduces a resulting width of pulses when a charge pulse is received from a particle detector, thereby reducing pile-up problems with pulses. Pulse shortening is obtained by resetting the pulse shortly after it exceeds its peak level at the apparatus output. The apparatus includes a charge-sensitive amplifier and a shaper which generates an output for subsequent discrimination circuits. A reset generator monitors the shaper output and generates a reset signal to the shaper when a peak has been detected.

    摘要翻译: 描述了一种粒子计数装置,当从粒子检测器接收到充电脉冲时,其减少了所产生的脉冲宽度,从而减少了脉冲堆积问题。 脉冲缩短是通过在器件输出超过其峰值电平后不久复位脉冲而获得的。 该装置包括一个电荷敏感放大器和整形器,其产生后续鉴别电路的输出。 当检测到峰值时,复位发生器监视整形器输出并产生到整形器的复位信号。

    COUNTING DETECTOR
    2.
    发明申请
    COUNTING DETECTOR 审中-公开
    计数器

    公开(公告)号:US20110036989A1

    公开(公告)日:2011-02-17

    申请号:US12988522

    申请日:2009-03-20

    IPC分类号: G01T1/17

    CPC分类号: G01T1/17

    摘要: A pulse shaper (124) includes an integrator (202) with a feedback capacitor (208) that stores integrated charge of a charge pulse indicative of a detected photon. An output pulse of the integrator includes a peak amplitude indicative of the detected photon. An end pulse identifier (214) identifies the end of the charge pulse. A controller (216) generates a control signal that invokes a reset of the integrator (202) when the end of the 5 pulse is identified. An energy discriminator (128) includes a chain of comparators (132) connected in series. An output of each of the comparators (702, 704) is influenced by an output of a previous one of the comparators 712 (702, 704). A decision component (706) determines an output of the comparators (702, 704), and a controller component (708) triggers the decision component (706) to store the output of the comparators (702, 704) 10 after lapse of a charge collection time.

    摘要翻译: 脉冲整形器(124)包括具有反馈电容器(208)的积分器(202),该反馈电容器存储指示检测到的光子的电荷脉冲的积分电荷。 积分器的输出脉冲包括指示检测到的光子的峰值振幅。 结束脉冲识别器(214)识别充电脉冲的结束。 当识别出5脉冲的结束时,控制器(216)产生调用积分器(202)的复位的控制信号。 能量鉴别器(128)包括串联连接的比较器链(132)。 每个比较器(702,704)的输出受比较器712(702,704)中的前一个的输出的影响。 判定部件(706)确定比较器(702,704)的输出,并且控制器部件(708)触发判定部件(706),以在经过充电之后存储比较器(702,704)10的输出 收集时间。

    DIGITAL PULSE PROCESSING FOR MULTI-SPECTRAL PHOTON COUNTING READOUT CIRCUITS
    3.
    发明申请
    DIGITAL PULSE PROCESSING FOR MULTI-SPECTRAL PHOTON COUNTING READOUT CIRCUITS 有权
    用于多光子计数读数电路的数字脉冲处理

    公开(公告)号:US20100270472A1

    公开(公告)日:2010-10-28

    申请号:US12665558

    申请日:2008-05-23

    IPC分类号: G01T1/17

    CPC分类号: G01T1/171

    摘要: An apparatus includes a local minimum identifier (408) that identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes that are indicative of the energy of successively detected photons from a multi-energetic radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) that corrects, based on the local minimum, for a pulse pile-up energy-discrimination error when energy-discriminating the pulses using at least two thresholds corresponding to different energy levels. This technique may reduce spectral error when counting photons at a high count rate.

    摘要翻译: 一种装置包括识别信号中重叠脉冲之间的局部最小值的局部最小标识符(408),其中脉冲具有指示由辐射敏感检测器从多能辐射束连续检测到的光子的能量的幅度, 以及脉冲堆积误差校正器(232),其基于局部最小值来校正针对对应于不同能级的至少两个阈值对脉冲进行能量鉴别的脉冲堆积能量鉴别误差。 当以高计数率计数光子时,该技术可能降低光谱误差。

    Clock generator and method therefor
    4.
    发明授权
    Clock generator and method therefor 失效
    时钟发生器及其方法

    公开(公告)号:US6133774A

    公开(公告)日:2000-10-17

    申请号:US263355

    申请日:1999-03-05

    IPC分类号: G06F1/10 H03K5/13 H03K3/00

    CPC分类号: G06F1/10 H03K5/13

    摘要: A clock provider system (100) receives an input clock X1 and, shifted by 90.degree., an input clock X2 and provides output clock Y as a free selectable logical function Y=f(X1, X2). A signal provider (103) comprises non-inverting delay units (150) and inverting delay units (160) each forwarding the input clocks X1 and X2 with a substantially equal delay. According to the required logical function, a distributor unit (170) sends the delayed signals to control inputs of a switch matrix (100) for providing intermediate signal Z. At the output, an inverter (102) inverts Z and provides Y. In the switch matrix (100), transistor chains (115, 116, 125, 126) alternatively pull an intermediate node (130, signal Z) either to a first (191) or to a second (192) reference potential. Thereby, near reference transistors (111, 114, 121, 124) are made conductive prior to near node transistors (112, 113, 122, 123).

    摘要翻译: 时钟提供器系统(100)接收输入时钟X1并且偏移90°的输入时钟X2,并将输出时钟Y提供为可自由选择的逻辑功能Y = f(X1,X2)。 信号提供器(103)包括非反相延迟单元(150)和反相延迟单元(160),每个延迟单元以大致相等的延迟转发输入时钟X1和X2。 根据所需的逻辑功能,分配器单元(170)将延迟的信号发送到用于提供中间信号Z的开关矩阵(100)的控制输入端。在输出端,逆变器(102)反转Z并提供Y.在 交替矩阵(100),晶体管链(115,116,125,126)交替地将中间节点(130,信号Z)拉至第一(191)或第二(192)参考电位。 因此,靠近参考晶体管(111,114,121,124)在靠近节点晶体管(112,113,122,123)之前被导通。

    Digital pulse processing for multi-spectral photon counting readout circuits
    5.
    发明授权
    Digital pulse processing for multi-spectral photon counting readout circuits 有权
    数字脉冲处理用于多光谱光子计数读出电路

    公开(公告)号:US08338791B2

    公开(公告)日:2012-12-25

    申请号:US12665558

    申请日:2008-05-23

    IPC分类号: G01J5/02

    CPC分类号: G01T1/171

    摘要: An apparatus includes a local minimum identifier (408) that identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes that are indicative of the energy of successively detected photons from a multi-energetic radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) that corrects, based on the local minimum, for a pulse pile-up energy-discrimination error when energy-discriminating the pulses using at least two thresholds corresponding to different energy levels. This technique may reduce spectral error when counting photons at a high count rate.

    摘要翻译: 一种装置包括识别信号中重叠脉冲之间的局部最小值的局部最小标识符(408),其中脉冲具有指示由辐射敏感检测器从多能辐射束连续检测到的光子的能量的幅度, 以及脉冲堆积误差校正器(232),其基于局部最小值来校正针对对应于不同能级的至少两个阈值对脉冲进行能量鉴别的脉冲堆积能量鉴别误差。 当以高计数率计数光子时,该技术可能降低光谱误差。

    PARTICLE-COUNTING APPARATUS WITH PULSE SHORTENING
    6.
    发明申请
    PARTICLE-COUNTING APPARATUS WITH PULSE SHORTENING 有权
    颗粒计数装置与脉冲缩小

    公开(公告)号:US20100207027A1

    公开(公告)日:2010-08-19

    申请号:US12682269

    申请日:2008-10-09

    IPC分类号: G01T1/18

    CPC分类号: G01T1/171

    摘要: A particle-counting apparatus is described, which reduces a resulting width of pulses when a charge pulse is received from a particle detector, thereby reducing pile-up problems with pulses. Pulse shortening is obtained by resetting the pulse shortly after it exceeds its peak level at the apparatus output. The apparatus includes a charge-sensitive amplifier and a shaper which generates an output for subsequent discrimination circuits. A reset generator monitors the shaper output and generates a reset signal to the shaper when a peak has been detected.

    摘要翻译: 描述了一种粒子计数装置,当从粒子检测器接收到充电脉冲时,其减少了所产生的脉冲宽度,从而减少了脉冲堆积问题。 脉冲缩短是通过在器件输出超过其峰值电平后不久复位脉冲而获得的。 该装置包括一个电荷敏感放大器和整形器,其产生后续鉴别电路的输出。 当检测到峰值时,复位发生器监视整形器输出并产生到整形器的复位信号。