公开(公告)号：US09748734B1

公开(公告)日：2017-08-29

申请号：US15203390

申请日：2016-07-06

Applicant: Raytheon Company

Inventor： Robert F. Stiffler ,  Michael S. Lackey ,  Thomas H. Alford

IPC: H01S5/042 ,  H01S5/40 ,  H01S3/23 ,  H01S3/0941

CPC classification number: H01S3/0941 ,  H01S3/2308 ,  H01S5/0428 ,  H01S5/4025

Abstract: A multi-stage laser drive circuit includes a variable common potential source, a PA light-emitting array between a storage capacitor and a current node, first and second low-side linear current sinks in electrical communication with the current node, and a second master oscillator (MO) light-emitting array in electrical communication between the current node and the first low side linear current sink. A trickle current circuit drives a low-value trickle current through the arrays, and a sense circuit senses the trickle current. Also, the headroom voltage across a pass element in the first low-side linear constant current sink is monitored and adjusted for maximum efficiency.

公开(公告)号：US20150263485A1

公开(公告)日：2015-09-17

申请号：US14668672

申请日：2015-03-25

Applicant: RAYTHEON COMPANY

Inventor： Michael S. Lackey ,  Thomas H. Alford ,  Robert F. Stiffler ,  David Filgas

IPC: H01S5/042 ,  H01S5/022 ,  H01S3/23 ,  H01S5/40 ,  H01S5/026

CPC classification number: H01S5/0428 ,  H01S3/2308 ,  H01S5/02248 ,  H01S5/0261 ,  H01S5/042 ,  H01S5/4018 ,  H01S5/4025 ,  H03K3/57

Abstract: Provided are assemblies and processes for activating light emitting devices. A first current sink is in electrical communication with a common source through a current node and configured to draw a first current through the current node in response to a respective control signal. A second current sink is also provided in electrical communication with the current node and in parallel with the first current sink, also configured to draw a second current through the current node in response to a respective control signal. An aggregate current is drawn through the array, determined as a combination of the first and second currents. A commanded current from the first current sink can be shunted around the second array and the second current sink, providing a capability to series both the first and second laser diode light-emitting arrays, while simultaneously drawing different current amplitudes through each array from a common potential source.

Abstract translation: 提供了用于激活发光器件的组件和过程。 第一电流接收器通过当前节点与公共源电连通并且被配置为响应于相应的控制信号而绘制通过当前节点的第一电流。 还提供第二电流吸收器，其与当前节点电连通并且与第一电流宿并联，还配置为响应于相应的控制信号而绘制通过当前节点的第二电流。 通过阵列绘制聚集电流，确定为第一和第二电流的组合。 来自第一电流吸收器的指令电流可以在第二阵列和第二电流接收器周围分流，提供串联第一和第二激光二极管发光阵列的能力，同时从普通的每个阵列绘制不同的电流幅度 潜在的来源。