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    • 10. 发明授权
    • Excimer laser having power supply with fine digital regulation
    • 准分子激光器具有精细数字调节的电源
    • US5982795A
    • 1999-11-09
    • US995832
    • 1997-12-22
    • Daniel A. RothweilIgor V. Fomenkov
    • Daniel A. RothweilIgor V. Fomenkov
    • G03F7/20H01S3/03H01S3/097H01S3/225H03K3/57H03K17/80H01S3/00
    • G03F7/70025G03F7/70041G03F7/70558G03F7/70575H01S3/03H01S3/097H01S3/225H03K17/80H03K3/57
    • An excimer laser system having a laser chamber containing elongated electrodes and an excimer laser gas and a high voltage pulse power supply having fine digital regulation for supplying high voltage electrical pulses to the electrodes. The high voltage pulse power supply includes a power supply and a magnetic switch circuit for compressing and amplifying the output of the power supply. The power supply includes a silicon controlled rectifier which provides a direct current output to an inverter which converts the output of the silicon controlled rectifier to high frequency alternating current which is in turn amplified by a step up transformer. An output stage diode rectifier in combination with an inductor converts this high frequency high voltage current back to direct current. A control board comprising electronic circuits controls the power supply to provide high voltage pulses at a frequency of at least 1000 Hz. A voltage feedback circuit detects the voltage output of the output stage rectifier and provides a voltage output signal to the control board and a current feedback circuit detects charging current flowing in the output stage diode rectifier and provides a charging current signal to the control board. A digital command control for providing command control to said control board. A preferred embodiment of the present invention achieves very precise regulation with the use of differential instrumentation amplifiers in the feedback circuits and by reducing the charging current near the end of the charging cycle of each pulse.
    • 准分子激光系统具有包含细长电极和准分子激光气体的激光室和具有用于向电极提供高电压电脉冲的精细数字调节的高压脉冲电源。 高压脉冲电源包括用于压缩和放大电源的输出的电源和磁开关电路。 该电源包括一个可控硅整流器,其向逆变器提供直流输出,该逆变器将可控硅整流器的输出转换成高频交流电,而高频交流又由升压变压器放大。 与电感器结合的输出级二极管整流器将该高频高压电流转换回直流电。 包括电子电路的控制板控制电源以提供至少1000Hz的频率的高电压脉冲。 电压反馈电路检测输出级整流器的电压输出,并向控制板提供电压输出信号,电流反馈电路检测在输出级二极管整流器中流动的充电电流,并向控制板提供充电电流信号。 一种用于向所述控制板提供命令控制的数字命令控制。 本发明的优选实施例通过在反馈电路中使用差分仪表放大器并且通过减少在每个脉冲的充电周期结束附近的充电电流来实现非常精确的调节。