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1. 发明申请

US20120268026A1 Biphase Laser Diode Driver And Method 有权
标题翻译：双相激光二极管驱动器及方法
公开(公告)号：US20120268026A1
公开(公告)日：2012-10-25
申请号：US13531584
申请日：2012-06-25
申请人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick , Noal Chandler
发明人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick , Noal Chandler
IPC分类号： H05B37/02 , G05F1/10
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。

2. 发明授权

US08729870B2 Biphase laser diode driver and method 有权
标题翻译：双相激光二极管驱动器及方法
公开(公告)号：US08729870B2
公开(公告)日：2014-05-20
申请号：US13531584
申请日：2012-06-25
申请人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick , Noal Chandler
发明人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick , Noal Chandler
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。

3. 发明申请

US20100207543A1 Biphase Laser Diode Driver And Method 有权
标题翻译：双相激光二极管驱动器和方法
公开(公告)号：US20100207543A1
公开(公告)日：2010-08-19
申请号：US12541915
申请日：2009-08-15
申请人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick
发明人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick
IPC分类号： H05B37/02
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 summed 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 a digital embodiment, 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 preferentially “locks” to the anti-phase of the master stage (or phase) and the ripple current at the summed output substantially cancels.
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（或相位）的电流驱动器驱动，其相加的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。从控制器优先“锁定”到主级（或相位）的反相位，并且相加输出处的纹波电流基本上消除。

4. 发明授权

US08207711B2 Biphase laser diode driver and method 有权
标题翻译：双相激光二极管驱动器及方法
公开(公告)号：US08207711B2
公开(公告)日：2012-06-26
申请号：US12541915
申请日：2009-08-15
申请人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick
发明人： Ian D. Crawford , Jeffrey T. Richter , Steven L. Pickles , John A. Harwick
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 summed 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 a digital embodiment, 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 preferentially “locks” to the anti-phase of the master stage (or phase) and the ripple current at the summed output substantially cancels.
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，其相加的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。从控制器优先“锁定”到主级（或相位）的反相位，并且相加输出处的纹波电流基本上消除。

5. 发明授权

US08184670B2 Smart linear pulsed laser diode driver, and method 有权
标题翻译：智能线性脉冲激光二极管驱动器及方法
公开(公告)号：US08184670B2
公开(公告)日：2012-05-22
申请号：US12900453
申请日：2010-10-07
申请人： Ian D. Crawford , John A. Harwick , Timothy M Ayres
发明人： Ian D. Crawford , John A. Harwick , Timothy M Ayres
IPC分类号： H01S3/00 , H01S3/13
CPC分类号： H05B33/0824 , H01S5/0428 , H05B33/0818 , H05B33/0851 , H05B33/0854 , Y02B20/347
摘要： In a pulsed laser diode driver an energy storage capacitor is continuously being charged to a supply voltage Vr. When a pulse is initiated, energy stored in the capacitor is delivered to the laser diode load. The capacitor voltage Vd at the end of a pulse is used to control Vr to ensure that Vd is maintained above a minimum voltage Vm required to ensure operation of a current control device (such as FET) just above saturation. Test pulses (such as with attenuated currents or reduced pulsewidth) may be fired to determine an initial optimum value for Vr. After a test pulse, a slightly high estimate for Vr may be used and may be iterated (incremented) down to an optimum value Vm during a firing burst. A digital processor may be used to calculate and store data to optimize the performance. Various embodiments are disclosed.
摘要翻译：在脉冲激光二极管驱动器中，储能电容器被连续地充电到电源电压Vr。当启动脉冲时，存储在电容器中的能量被传送到激光二极管负载。脉冲结束时的电容器电压Vd用于控制Vr，以确保Vd保持在高于饱和度的电流控制装置（例如FET）的操作所需的最小电压Vm以上。可以激发测试脉冲（例如具有衰减电流或减小的脉冲宽度）以确定Vr的初始最佳值。在测试脉冲之后，可以使用略微高的Vr估计，并且可以在发射突发期间迭代（递增）到最佳值Vm。数字处理器可用于计算和存储数据以优化性能。公开了各种实施例。

6. 发明申请

US20110085576A1 SMART LINEAR PULSED LASER DIODE DRIVER, AND METHOD 有权
标题翻译： SMART线性脉冲激光二极管驱动器及方法
公开(公告)号：US20110085576A1
公开(公告)日：2011-04-14
申请号：US12900453
申请日：2010-10-07
申请人： Ian D. Crawford , John A. Harwick , Timothy M. Ayres
发明人： Ian D. Crawford , John A. Harwick , Timothy M. Ayres
IPC分类号： H01S3/00 , H05B41/36
CPC分类号： H05B33/0824 , H01S5/0428 , H05B33/0818 , H05B33/0851 , H05B33/0854 , Y02B20/347
摘要： In a pulsed laser diode driver an energy storage capacitor is continuously being charged to a supply voltage Vr. When a pulse is initiated, energy stored in the capacitor is delivered to the laser diode load. The capacitor voltage Vd at the end of a pulse is used to control Vr to ensure that Vd is maintained above a minimum voltage Vm required to ensure operation of a current control device (such as FET) just above saturation. Test pulses (such as with attenuated currents or reduced pulsewidth) may be fired to determine an initial optimum value for Vr. After a test pulse, a slightly high estimate for Vr may be used and may be iterated (incremented) down to an optimum value Vm during a firing burst. A digital processor may be used to calculate and store data to optimize the performance. Various embodiments are disclosed.
摘要翻译：在脉冲激光二极管驱动器中，储能电容器被连续地充电到电源电压Vr。当启动脉冲时，存储在电容器中的能量被传送到激光二极管负载。脉冲结束时的电容器电压Vd用于控制Vr，以确保Vd保持在高于饱和度的电流控制装置（例如FET）的操作所需的最小电压Vm以上。可以激发测试脉冲（例如具有衰减电流或减小的脉冲宽度）以确定Vr的初始最佳值。在测试脉冲之后，可以使用略微高的Vr估计，并且可以在发射突发期间迭代（递增）到最佳值Vm。数字处理器可用于计算和存储数据以优化性能。公开了各种实施例。

7. 发明授权

US5461297A Series-parallel switchable capacitor charging system 失效
标题翻译：串并联可切换电容充电系统
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
IPC分类号： H02M3/28 , H02M3/335 , H02M7/10 , H02M7/217
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。

8. 发明申请

US20180323576A1 PULSED LASER DIODE DRIVERS AND METHODS 审中-公开
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.

9. 发明授权

US06650404B1 Laser rangefinder receiver 有权
标题翻译：激光测距仪接收机
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。

10. 发明授权

US06587490B2 Low-noise current source driver for laser diodes 失效
标题翻译：用于激光二极管的低噪声电流源驱动器
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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