Laser Turn-On Accelerator Independent of Bias Control Loop Bandwidth
    1.
    发明申请
    Laser Turn-On Accelerator Independent of Bias Control Loop Bandwidth 有权
    激光开启加速器,独立于偏置控制环路带宽

    公开(公告)号:US20070071048A1

    公开(公告)日:2007-03-29

    申请号:US11559255

    申请日:2006-11-13

    IPC分类号: H01S3/13 H01S3/00

    CPC分类号: H01S5/06825 H01S5/0683

    摘要: An accelerator circuit is incorporated in a laser diode system for accelerating the turn-on operation of the laser diode independent of the control loop bandwidth of the laser diode system. The accelerator circuit provides a boost current to a compensation capacitor upon laser turn-on which compensation capacitor operates to establish the control loop bandwidth of the laser diode system. The boost current enables the control loop to increase the bias current to the laser diode quickly. When the laser diode reaches the desired operating point, the boost current is terminated and the control loop of the laser diode system resumes normal control of the bias current. In one embodiment, the accelerator circuit includes a timer circuit controlling a current source to implement open loop turn-on control. In another embodiment, the accelerator circuit includes a comparator circuit working in conjunction with an one-shot logic circuit for providing close loop control.

    摘要翻译: 加速器电路被并入激光二极管系统中,用于加速激光二极管的导通操作,而与激光二极管系统的控制回路带宽无关。 加速器电路在激光接通时向补偿电容器提供升压电流,补偿电容器用于建立激光二极管系统的控制回路带宽。 升压电流使控制环能够快速增加激光二极管的偏置电流。 当激光二极管达到所需的工作点时,升压电流终止,激光二极管系统的控制回路恢复正常的偏置电流控制。 在一个实施例中,加速器电路包括控制电流源以实现开环开启控制的定时器电路。 在另一个实施例中,加速器电路包括与单触发逻辑电路结合工作以提供闭环控制的比较器电路。

    Numerical value conversion using a saturation limited arithmetic logic unit supporting variable resolution operands
    2.
    发明申请
    Numerical value conversion using a saturation limited arithmetic logic unit supporting variable resolution operands 有权
    使用饱和限制运算逻辑单元支持可变分辨率操作数的数值转换

    公开(公告)号:US20050131973A1

    公开(公告)日:2005-06-16

    申请号:US10759988

    申请日:2004-01-15

    IPC分类号: G06F7/00

    CPC分类号: H03M1/1235 H03M1/129

    摘要: A device for performing numerical value conversion of a digital input value in a first unit to a second, natural unit where the digital input value is a digitized value of a first measurement parameter includes a look-up table storing an array of coefficients for performing the numerical value conversion for multiple measurement parameters. The look-up table is indexed using a first parameter indicative of the first measurement parameter to provide a selected coefficient. The device further includes an arithmetic logic unit (ALU) receiving the digital input value and the selected coefficient and performing the numerical value conversion based on a first equation and the selected coefficient to compute a digital output value. The device also includes a saturation-limit circuit coupled to receive the digital output value from the arithmetic logic unit and provide a predetermined output value when the digital output value exceeds a predetermined maximum value.

    摘要翻译: 一种用于对第一单元中的数字输入值进行数值转换的装置,其中数字输入值是第一测量参数的数字化值的第二自然单元包括:存储用于执行第一测量参数的系数阵列的查找表; 多个测量参数的数值转换。 使用指示第一测量参数的第一参数来索引查找表以提供所选择的系数。 该装置还包括接收数字输入值和所选系数的算术逻辑单元(ALU),并且基于第一方程和所选择的系数执行数值转换以计算数字输出值。 该装置还包括饱和极限电路,其被耦合以从所述算术逻辑单元接收所述数字输出值,并且当所述数字输出值超过预定最大值时提供预定的输出值。

    AUTOMATIC CONTROL OF LASER DIODE CURRENT AND OPTICAL POWER OUTPUT
    3.
    发明申请
    AUTOMATIC CONTROL OF LASER DIODE CURRENT AND OPTICAL POWER OUTPUT 有权
    激光二极管电流和光功率输出的自动控制

    公开(公告)号:US20070114361A1

    公开(公告)日:2007-05-24

    申请号:US11626302

    申请日:2007-01-23

    IPC分类号: G01J1/32

    摘要: An automatic power control system provides a control signal that regulates the output power of at least one laser diode. Coarse adjustment of the control signal is provided by a first means, preferably a digital variable resistor, while fine adjustment and compensation is provided by a second means, preferably by a digital-to-analog converter that receives an input signal proportional to a sensed control system parameter. The control system includes an operational amplifier having a first input coupled to sense output power, and a second input coupled to a DAC to provide finer resolution control. Memory can store system parameter or system parameter variations that can be coupled to the DAC and/or variable resistor to enhance system stability over ambient variations.

    摘要翻译: 自动功率控制系统提供调节至少一个激光二极管的输出功率的控制信号。 控制信号的粗调是由第一装置,优选数字可变电阻器提供的,而微调和补偿由第二装置提供,优选地由接收与感测控制成正比的输入信号的数 - 模转换器 系统参数。 控制系统包括运算放大器,其具有耦合以感测输出功率的第一输入,以及耦合到DAC的第二输入以提供更精细的分辨率控制。 存储器可以存储可耦合到DAC和/或可变电阻器的系统参数或系统参数变化,以增强系统在环境变化方面的稳定性。

    Numerical value conversion using a look-up table for coefficient storage
    4.
    发明申请
    Numerical value conversion using a look-up table for coefficient storage 有权
    使用系数存储的查找表进行数值转换

    公开(公告)号:US20050131972A1

    公开(公告)日:2005-06-16

    申请号:US10759786

    申请日:2004-01-15

    IPC分类号: G06F1/035 G06F7/00

    CPC分类号: G06F1/0356

    摘要: A device for performing numerical value conversion of a digital input value in a first unit to a second unit being a natural unit includes a look-up table storing an array of coefficients for performing the numerical value conversion. The look-up table is indexed using a first parameter to provide a selected coefficient. An arithmetic logic unit (ALU) is coupled to receive the digital input value and the selected coefficient and perform the numerical value conversion based on a first equation using the selected coefficient to compute a digital output value in the second unit. The first unit can be an arbitrary ADC unit and the second unit is a natural unit of physical measurement, such as volts, amperes, degree Centigrade. Furthermore, the device can be used to perform numerical value conversion from the arbitrary unit to the natural unit having a linear or a non-linear relationship.

    摘要翻译: 用于将第一单元中的数字输入值数值转换为作为自然单元的第二单元的设备包括存储执行数值转换的系数阵列的查找表。 使用第一参数来索引查找表以提供所选择的系数。 耦合算术逻辑单元(ALU)以接收数字输入值和所选择的系数,并且使用所选择的系数基于第一等式执行数值转换,以计算第二单元中的数字输出值。 第一个单元可以是任意的ADC单元,第二个单元是物理测量的自然单位,如伏特,安培,摄氏度。 此外,该装置可以用于执行从任意单元到具有线性或非线性关系的自然单元的数值转换。

    Laser turn-on accelerator independent of bias control loop bandwidth
    5.
    发明申请
    Laser turn-on accelerator independent of bias control loop bandwidth 有权
    激光打开加速器独立于偏置控制环路带宽

    公开(公告)号:US20050129075A1

    公开(公告)日:2005-06-16

    申请号:US10759987

    申请日:2004-01-15

    摘要: An accelerator circuit is incorporated in a laser diode system for accelerating the turn-on operation of the laser diode independent of the control loop bandwidth of the laser diode system. The accelerator circuit provides a boost current to a compensation capacitor upon laser turn-on which compensation capacitor operates to establish the control loop bandwidth of the laser diode system. The boost current enables the control loop to increase the bias current to the laser diode quickly. When the laser diode reaches the desired operating point, the boost current is terminated and the control loop of the laser diode system resumes normal control of the bias current. In one embodiment, the accelerator circuit includes a timer circuit controlling a current source to implement open loop turn-on control. In another embodiment, the accelerator circuit includes a comparator circuit working in conjunction with an one-shot logic circuit for providing close loop control.

    摘要翻译: 加速器电路被并入激光二极管系统中,用于加速激光二极管的导通操作,而与激光二极管系统的控制回路带宽无关。 加速器电路在激光接通时向补偿电容器提供升压电流,补偿电容器用于建立激光二极管系统的控制回路带宽。 升压电流使控制环能够快速增加激光二极管的偏置电流。 当激光二极管达到所需的工作点时,升压电流终止,激光二极管系统的控制回路恢复正常的偏置电流控制。 在一个实施例中,加速器电路包括控制电流源以实现开环开启控制的定时器电路。 在另一个实施例中,加速器电路包括与单触发逻辑电路结合工作以提供闭环控制的比较器电路。