专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明授权

US4620107A Compensated light pen with variable attenuator 失效
标题翻译：补偿光笔与可变衰减器
公开(公告)号：US4620107A
公开(公告)日：1986-10-28
申请号：US649061
申请日：1984-09-10
申请人： Gary E. Frame
发明人： Gary E. Frame
IPC分类号： G06F3/038 , G09G3/02 , G06K7/10
CPC分类号： G06F3/03542 , G06F3/0383
摘要： An automatically compensated light pen for use with a video display monitor incorporating a cathode ray tube, including, a detector for detecting light pulses produced by the cathode ray tube when the detector is positioned adjacent the cathode ray tube at a particular desired location and for producing electrical pulses in accordance with the light pulses, a variable attenuator having a first input coupled to the output of the detector and responsive to the electrical pulses from the detector for producing variably attenuated electrical pulses and having a second control input responsive to a control signal for controlling the level of the variably attenuated electrical pulses, a threshold comparator coupled to the output of the variable attenuator and responsive to the variably attenuated electrical pulses for producing output electrical pulses when the level of the variably attenuated electrical pulses are higher than a particular threshold level for the threshold comparator, and a peak detector coupled between the output of the variable comparator and the control input of the variable attenuator and responsive to the variably attenuated electrical pulses for producing a control signal coupled to the control input of the variable attenuator when the level of the variably attenuated electrical pulses are higher than a particular peak level for the peak detector and with the particular threshold level for the threshold comparator less than the particular peak level for the peak detector.
摘要翻译：一种自动补偿的光笔，用于包括阴极射线管的视频显示监视器，包括用于检测当检测器位于与特定期望位置相邻的阴极射线管时由阴极射线管产生的光脉冲并用于产生根据光脉冲的电脉冲，可变衰减器，其具有耦合到检测器的输出的第一输入，并且响应于来自检测器的电脉冲，用于产生可变衰减的电脉冲，并具有响应于控制信号的第二控制输入控制所述可变衰减的电脉冲的电平;阈值比较器，耦合到所述可变衰减器的输出，并且响应于所述可变衰减的电脉冲以在所述可变衰减的电脉冲的电平高于特定阈值电平时产生输出电脉冲对于阈值比较器，和a 峰值检测器耦合在可变比较器的输出端和可变衰减器的控制输入端之间，并响应于可变衰减的电脉冲，用于当可变衰减的电脉冲的电平为可变衰减电脉冲时产生耦合到可变衰减器的控制输入的控制信号高于峰值检测器的特定峰值电平，并且阈值比较器的特定阈值电平小于峰值检测器的特定峰值电平。

IPRDB

热门服务

关于我们

友情链接

联系方式