Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media
    2.
    发明授权
    Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media 有权
    用于在用于从光学记录介质读取或写入光学记录介质的设备中调节扫描光束的光功率的方法和装置

    公开(公告)号:US07161882B2

    公开(公告)日:2007-01-09

    申请号:US10451476

    申请日:2001-12-10

    CPC classification number: G11B7/126 G11B7/0045 G11B7/005

    Abstract: In order to compensate for so-called clipping effects, it is proposed, in an apparatus for reading from and/or writing to an optical recording medium in which the light power of a laser diode (1) is to be set to a plurality of light power levels,to perform a calibration to a specific light power level (LP2) before the actual regulation of the light power. On account of the calibration, the instantaneous gradient of the characteristic curve which describes the dependence of the laser light power on the laser diode current can be inferred in order, on the basis of this information, to take account f a change—caused, for example, by ageing r clipping effects—in the characteristic curve gradient in the course of the subsequent regulation of the light power of the scanning beam generated by the laser diode (1).

    Abstract translation: 为了补偿所谓的削波效应,提出了在将要将激光二极管(1)的光功率设置为多个的光记录介质读取和/或写入的装置中, 光功率水平,在实际调节光功率之前对特定光功率电平(LP 2)进行校准。 由于校准,可以根据该信息依次描述描述激光二极管电流的激光依赖关系的特性曲线的瞬时梯度,以考虑到诸如变化引起的变化。 通过老化r削波效应 - 在随后调节由激光二极管(1)产生的扫描光束的光功率的过程中的特性曲线梯度。

    Start-up circuit for a switch mode power supply
    3.
    发明授权
    Start-up circuit for a switch mode power supply 失效
    开关电源的启动电路

    公开(公告)号:US5452195A

    公开(公告)日:1995-09-19

    申请号:US138212

    申请日:1993-10-08

    CPC classification number: H02M1/36 H02M3/33576 Y10S323/901

    Abstract: An integrated control circuit forms a driver stage of an output transistor of a switch mode power supply. During a start-up interval of a run mode operation, the control circuit does not consume supply current and does not produce a switching control signal for switching the transistor. During an initialization interval that follows the start-up interval, a reference voltage source that is included in the control circuit is turned on and internal conditions in the control circuit are defined. The switching control signal is generated following the initialization interval.

    Abstract translation: 集成控制电路形成开关模式电源的输出晶体管的驱动级。 在运行模式操作的启动间隔期间,控制电路不消耗供电电流,并且不产生用于切换晶体管的开关控制信号。 在启动间隔之后的初始化间隔期间,包括在控制电路中的参考电压源导通,并且定义控制电路中的内部条件。 在初始化间隔之后生成切换控制信号。

    Circuit for generating very small currents
    5.
    发明授权
    Circuit for generating very small currents 失效
    用于产生非常小电流的电路

    公开(公告)号:US5426359A

    公开(公告)日:1995-06-20

    申请号:US129279

    申请日:1993-09-30

    CPC classification number: G05F3/265

    Abstract: The relationship of a reference current of a current balancing circuit to a first output current at the collector of an output transistor is adjusted via the dimensioning of a first resistance R in the emitter of the output transistor of a current balancing circuit. By adding a second current balancing circuit with a second resistor R' contained therein and which provides a second output current, there results, for R=R', the relationship of the first output current to the second output current corresponding to the relationship of the reference current to the first output current.

    Abstract translation: 通过电流平衡电路的输出晶体管的发射极中的第一电阻R的尺寸来调节电流平衡电路的参考电流与输出晶体管的集电极处的第一输出电流的关系。 通过添加包含在其中的第二电阻器R'的第二电流平衡电路并且提供第二输出电流,对于R = R',结果导致与第二输出电流的关系对应的第一输出电流与第二输出电流的关系 参考电流到第一个输出电流。

Patent Agency Ranking