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公开(公告)号：US07348948B2
公开(公告)日：2008-03-25
申请号：US10889308
申请日：2004-07-12
申请人： Ian D. Crawford , John Harwick , Miguel Morales
发明人： Ian D. Crawford , John Harwick , Miguel Morales
IPC分类号： G09G3/32
CPC分类号： H05B33/0815 , H01S5/042
摘要： A driver supplying a total current to a load has a plurality (n) of driver stages (ST1 . . . STn). One stage is a master stage. Each driver stage has a switching device (Q) and an inductor (L) connected in series between the switching device and the output of the driver stage. The switching devices are turned ON in sequence with one another, during a cycle time (Tc) which is determined by sensing current through the inductor (L1) in the master stage. When the switching device is turned ON current through the inductor rises, when the inductor current reaches the value of a demanded current the switch is turned OFF, and after the switch is turned OFF the inductor continues to supply (output) current to the load with a current which ramps down. A rectifying device (D) connected between the inductor and the supply line allows current to continue to flow in the inductor and be supplied to the load after the switch is turned OFF.
摘要翻译： 向负载提供总电流的驱动器具有多个（n）个驱动级（ST1 ... STn）。 一个阶段是主舞台。 每个驱动级具有在开关装置和驱动器级的输出之间串联连接的开关装置（Q）和电感器（L）。 在通过感测通过主级中的电感器（L1）的电流确定的周期时间（Tc）期间，开关器件依次导通。 当开关器件导通时，通过电感的电流上升，当电感电流达到需求电流值时，开关转为OFF，并且在开关断开之后，电感器继续向负载供给（输出）电流 一个下降的电流。 连接在电感器和电源线之间的整流装置（D）允许电流在电感器中继续流动，并且在开关断开之后被提供给负载。
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公开(公告)号：US07262584B2
公开(公告)日：2007-08-28
申请号：US11054349
申请日：2005-02-09
申请人： Ian D. Crawford , Miguel Morales
发明人： Ian D. Crawford , Miguel Morales
IPC分类号： G05F1/59
CPC分类号： H05B33/0818 , H01S5/0428 , H01S5/06808
摘要： A capacitor is connected to the output of a multiphase power converter, and a current-driven device (e.g., LED or laser diode) is also connected to the power converter output. A solid state switch (FET or IGBT) is connected in series with the current-driven device. Means are provided for sensing current through the current-driven device. An error amplifier compares sensed current through the current-driven device with a current level demand signal and controls the output of the power converter. Means are provided for turning the switch on and off and may be (i) a fast comparator receiving a voltage reference signal at one input and the current level demand signal at another input, and outputting the switch on/off signal to the switch or (ii) an externally-generated logic signal provided directly to the switch.
摘要翻译： 电容器连接到多相功率转换器的输出端，并且电流驱动器件（例如，LED或激光二极管）也连接到功率转换器输出端。 固态开关（FET或IGBT）与电流驱动装置串联连接。 提供用于感测通过电流驱动装置的电流的装置。 误差放大器将通过电流驱动装置的感测电流与电流电平需求信号进行比较，并控制功率转换器的输出。 提供用于打开和关闭开关的装置，并且可以是（i）在一个输入处接收电压参考信号的快速比较器和在另一输入处的当前电平需求信号，并且将开关接通/断开信号输出到开关或（ ii）直接提供给开关的外部产生的逻辑信号。
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公开(公告)号：US20120268026A1
公开(公告)日：2012-10-25
申请号：US13531584
申请日：2012-06-25
CPC分类号： H05B33/0815
摘要： A current-driven load such as LEDs or laser diodes is driven by a current driver having a two stages (or phases), the outputs of which have ripple which is forced to be out-of-phase with one another. In analog embodiments, an output (ripple or switching) of a master stage hysteresis controller is phase-shifted and scaled, and modulates the input of a slave stage hysteresis controller so that the slave stage pulls into a ripple-canceling phase. In digital embodiments, a faster of the two phases is designated “master”, maximum and minimum thresholds are set, and the slave phase's on time is based on a previous cycle's slave phase ON time, the master stage OFF time and an offset. The slave controller may “lock” to the anti-phase of the master stage (or phase). The ripple currents at the summed output of the master and slave stages substantially cancel.
摘要翻译： 诸如LED或激光二极管的电流驱动负载由具有两级（或相）的电流驱动器驱动，其输出具有被迫彼此异相的纹波。 在模拟实施例中，主级滞后控制器的输出（纹波或切换）被相移和缩放，并且调制从属级滞后控制器的输入，使得从级将拉入纹波消除阶段。 在数字实施例中，两相中较快的速度被指定为主，最大和最小阈值被设置，并且从动相的导通时间基于先前的周期的从相接通时间，主阶段关断时间和偏移量。 从控制器可能锁定到主级（或相）的反相。 主级和从级相加输出的纹波电流基本上消除。
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公开(公告)号：US5461297A
公开(公告)日：1995-10-24
申请号：US65994
申请日：1993-05-24
申请人： Ian D. Crawford
发明人： Ian D. Crawford
CPC分类号： H02M3/33561 , H02M3/28 , H02M7/10
摘要： In a capacitor charging system having multiple rectified outputs of secondary (transformer) windings, the rectified outputs are connected in parallel for enhanced charging of an energy-storage capacitor below a threshold voltage, and are connected in series above the threshold voltage. In the parallel mode, forward biased diodes connected from rectifier-to-rectifier effect the parallel connection. In the series mode, a switch closure effectively connects the rectifiers in series, which reverse biases the diodes. For switching two or more rectified outputs, the number of switch closures required is one less than the secondary windings. Multiple windings (and rectifiers) can be paired and switched, and two or more thresholds can be employed.
摘要翻译： 在具有次级（变压器）绕组的多个整流输出的电容器充电系统中，整流输出并联连接，用于增加对低于阈值电压的蓄能电容器的充电，并串联连接在阈值电压以上。 在并联模式下，从整流器到整流器连接的正向偏置二极管影响并联连接。 在串联模式下，开关闭合有效地串联整流器，反向偏置二极管。 为了切换两个或更多个整流输出，所需的开关闭合次数比次级绕组少一个。 多个绕组（和整流器）可以配对和切换，并且可以采用两个或多个阈值。
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公开(公告)号：US20180323576A1
公开(公告)日：2018-11-08
申请号：US15954596
申请日：2018-04-17
申请人： Ian D. Crawford , Dwight E. Wildon
发明人： Ian D. Crawford , Dwight E. Wildon
IPC分类号： H01S5/042
CPC分类号： H01S5/0428 , G01S7/4814 , G01S7/484 , H02M1/088 , H02M1/32 , H02M3/156 , H02M3/158 , H02M3/335 , H02M2001/0048 , H02M2001/007 , H02M2001/348 , H03K17/04123 , H03K17/08104 , H03K17/691 , H05B33/0815
摘要： A current driver is disclosed which allows very short pulses at high currents to be generated for high power laser diodes. The parasitic inductance of the laser diode limits the speed at which the laser diode may be turned on and off. A high voltage is used to charge this inductance rapidly and maximize the rise time. The fall time is shortened by allowing a similar high voltage to be generated at turnoff without damage to the laser diode or switching components. A portion of the energy stored in the parasitic inductance may recovered to reduce drain on the power source, and to improve overall efficiency. The anode of the laser may be switched to ground at the end of a pulse.
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公开(公告)号：US06650404B1
公开(公告)日：2003-11-18
申请号：US10156151
申请日：2002-05-28
申请人： Ian D. Crawford
发明人： Ian D. Crawford
IPC分类号： G01C308
CPC分类号： G01S7/489 , G01S7/4873
摘要： In a laser rangefinder receiver, a return signal from a light-sensitive detector is passed through a high-pass filter, and is then processed in two separate circuit paths, a “signal” path and a “noise” path. The “signal” path employs a time-variable offset scheme to control receiver sensitivity. The “noise” path measures noise in the return signal, and maintain a noise-based threshold independent of the time-variable sensitivity of the “signal” path. No interstage coupling capacitors are employed, which contributes greatly to the receiver's quick saturation recovery.
摘要翻译： 在激光测距仪接收机中，来自感光检测器的返回信号通过高通滤波器，然后在两个单独的电路路径“信号”路径和“噪声”路径中进行处理。 “信号”路径采用时变偏移方案来控制接收机灵敏度。 “噪声”路径测量返回信号中的噪声，并且保持独立于“信号”路径的时变灵敏度的基于噪声的阈值。 没有使用级间耦合电容器，这大大有助于接收器的快速饱和恢复。
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公开(公告)号：US06587490B2
公开(公告)日：2003-07-01
申请号：US09969339
申请日：2001-10-02
申请人： Ian D. Crawford
发明人： Ian D. Crawford
IPC分类号： H01S300
CPC分类号： H01S5/042
摘要： A low-noise current source driver for a laser diode load is achieved by means of a current-regulated supply connected across the load, and a shunt regulator. The shunt regulator comprises a shunting element, a current sensing element for sensing current conducted through the load, and an error amplifier responsive to a difference between the current sensed by the current sensing element and a first reference current. The current regulator is designed to respond to a signal a signal representative of a second reference current to produce an appropriate corresponding output current. The shunting element is connected across the power supply and load, and is controlled by the error amplifier to conduct all current from the current regulated supply in excess of the first reference current. The second reference current is greater than the first reference current by an amount sufficient to ensure that noise and ripple currents cannot cause the output of the current-regulated supply to drop below the first reference current.
摘要翻译： 用于激光二极管负载的低噪声电流源驱动器通过连接在负载上的电流调节电源和分流调节器来实现。 分流调节器包括分流元件，用于感测通过负载传导的电流的电流感测元件，以及响应于由电流感测元件感测的电流与第一参考电流之间的差异的误差放大器。 电流调节器被设计为响应信号代表第二参考电流的信号以产生适当的对应的输出电流。 分流元件连接在电源和负载两端，并由误差放大器控制，以将来自电流调节电源的所有电流超过第一个参考电流。 第二参考电流大于第一参考电流，其量足以确保噪声和纹波电流不会导致电流调节电源的输出降至低于第一参考电流。
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公开(公告)号：US08729870B2
公开(公告)日：2014-05-20
申请号：US13531584
申请日：2012-06-25
IPC分类号： G05F1/70
CPC分类号： H05B33/0815
摘要： A current-driven load such as LEDs or laser diodes is driven by a current driver having a two stages (or phases), the outputs of which have ripple which is forced to be out-of-phase with one another. In analog embodiments, an output (ripple or switching) of a master stage hysteresis controller is phase-shifted and scaled, and modulates the input of a slave stage hysteresis controller so that the slave stage pulls into a ripple-canceling phase. In digital embodiments, a faster of the two phases is designated “master”, maximum and minimum thresholds are set, and the slave phase's on time is based on a previous cycle's slave phase ON time, the master stage OFF time and an offset. The slave controller may “lock” to the anti-phase of the master stage (or phase). The ripple currents at the summed output of the master and slave stages substantially cancel.
摘要翻译： 诸如LED或激光二极管的电流驱动负载由具有两级（或相）的电流驱动器驱动，其输出具有被迫彼此异相的纹波。 在模拟实施例中，主级滞后控制器的输出（纹波或切换）被相移和缩放，并且调制从属级滞后控制器的输入，使得从级将拉入纹波消除阶段。 在数字实施例中，两相中较快的速度被指定为“主”，设定最大和最小阈值，并且从动相的导通时间基于先前的周期的从相接通时间，主阶段关断时间和偏移量。 从控制器可以“锁定”到主级（或相）的反相。 主级和从级相加输出的纹波电流基本上消除。
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公开(公告)号：US08451432B2
公开(公告)日：2013-05-28
申请号：US12835719
申请日：2010-07-13
IPC分类号： G01C3/08
摘要： A laser spot tracker comprising a quadrant detector. A portion of a spot of laser light reflected from an object being illuminated (OBI) may be defocused to occupy a significant portion such as one-third of the field of view, while another portion remains focused, therefore allowing for quick calculation of the spot centroid. With such a “composite spot”, multiple target (OBI) positions may simultaneously be defined in elevation and azimuth with respect to null by analyzing the energy in each quadrant. The X and Y angle information (off null) for multiple targets (OBIs), and their codes may be displayed. For a large, defocused spot, two segmented multi-element detectors may be used, one in front of and the other behind the focal plane to reduce the effects of hot spots in a spot of laser light collected from an object being illuminated.
摘要翻译： 包括象限检测器的激光点跟踪器。 从被照明物体（OBI）反射的激光光斑的一部分可以散焦以占据诸如视场三分之一的重要部分，而另一部分保持聚焦，因此允许快速计算斑点 重心。 通过这样的“复合点”，通过分析每个象限中的能量，可以同时在高程和方位上定义多个目标（OBI）位置相对于零。 可以显示多个目标（OBI）的X和Y角度信息（关闭空值）及其代码。 对于大的散焦点，可以使用两个分段多元件检测器，一个在焦平面之前，另一个在焦平面之后，以减少从被照射物体收集的激光光斑中的热点的影响。
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公开(公告)号：US07773202B2
公开(公告)日：2010-08-10
申请号：US11423367
申请日：2006-06-09
申请人： Ian D. Crawford , Noal Chandler , John Harwick , William Hudson , Dwight Wildon
发明人： Ian D. Crawford , Noal Chandler , John Harwick , William Hudson , Dwight Wildon
IPC分类号： G01C3/08
CPC分类号： G01C3/08
摘要： A laser spot tracker device comprising a laser tracker receiver using a quadrant detector incorporated into a pair of binoculars or optical telescope system with a crosshair or reticule. Directional information from the laser tracker receiver is displayed to an operator (JTAC) to allow the reticule to be manually steered on to the target illuminated by the laser, thus identifying the target to the spotter. The laser code may be pre-selected to track a particular designator, or, the tracker may read out the code or codes of laser spots within its field of view.
摘要翻译： 一种激光瞄准器装置，其包括使用结合到一对双目镜中的象限检测器的激光跟踪器接收器或具有十字准线或网状的光学望远镜系统。 来自激光跟踪器接收器的定向信息被显示给操作者（JTAC），以允许将网状物手动地导向由激光照射的目标，从而将识别器的目标识别。 可以预先选择激光码来跟踪特定的指示符，或者，跟踪器可以在其视野内读出激光点的代码或代码。
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