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    • 6. 发明授权
    • Analog/digital converting circuit
    • 模拟/数字转换电路
    • US6127958A
    • 2000-10-03
    • US150906
    • 1998-09-10
    • Dong-Young ChangJae-Yup LeeSeung-Hoon LeeYong-In ParkSeung Woo Park
    • Dong-Young ChangJae-Yup LeeSeung-Hoon LeeYong-In ParkSeung Woo Park
    • H03M1/14H03M1/06H03M1/12H03M1/16H03M1/40H03M3/02H03M1/00
    • H03M1/162
    • An analog/digital (A/D) converting circuit is provided that stabilizes system operation, reduces power consumption in an analog circuit region and uses a selected metal-to-metal capacitor, which has a small parasitic capacitance value. The A/D converting circuit includes a first sample/hold amplifier for sampling/holding an analog input signal, a switch for selecting one of a signal outputted from the first sample/hold amplifier and a feedback signal and an A/D sub-converter for converting an analog signal outputted from the switch to a digital signal. A multiplying D/A converting block converts an output signal from the A/D sub-converter to an analog signal and amplifies a difference value obtained between the analog signal and the analog signal outputted from the switch. A second sample/hold amplifier samples/holds a signal outputted from the multiplying D/A converting block and outputs the feedback signal to the switch. A digital correcting unit outputs an N bit digital signal by superimposing output signals from the A/D sub-converter by 1 bit and a timing controller generates a control signal and a timing clock signal for the operation of each unit.
    • 提供一种模拟/数字(A / D)转换电路,其稳定系统操作,降低模拟电路区域的功耗,并使用具有小的寄生电容值的选定的金属 - 金属电容器。 A / D转换电路包括用于采样/保持模拟输入信号的第一采样/保持放大器,用于选择从第一采样/保持放大器输出的信号和反馈信号中的一个的开关和A / D子转换器 用于将从开关输出的模拟信号转换成数字信号。 乘法D / A转换块将来自A / D子转换器的输出信号转换为模拟信号,并放大从模拟信号和从开关输出的模拟信号之间获得的差值。 第二取样/保持放大器对乘法D / A转换块输出的信号进行采样/保持,并将反馈信号输出到开关。 数字校正单元通过将来自A / D子转换器的输出信号叠加1位输出N位数字信号,并且定时控制器产生用于每个单元的操作的控制信号和定时时钟信号。
    • 8. 发明授权
    • Multi-leaf collimator device for radiotherapy
    • 用于放射治疗的多叶准直器装置
    • US08917816B2
    • 2014-12-23
    • US13582297
    • 2011-03-03
    • Young Hoon JiHai Jo JungKum Bae KimMun Sik ChoiSeung Woo Park
    • Young Hoon JiHai Jo JungKum Bae KimMun Sik ChoiSeung Woo Park
    • A61N5/10G21K1/04
    • A61N5/1045G21K1/046Y10T74/18096
    • A multi-leaf collimator device for radiotherapy, including: a frame that has a box shape and has through-holes formed in top and bottom surfaces thereof; a plurality of collimators that are received in the frame, wherein each of the collimators includes a rack gear formed on the top surface of the collimator, the collimators are symmetrically arranged in a left-right direction about a central portion of the frame, and are slidably provided on the frame; and a motion driving unit that includes a pinion gear that is formed to be detachable from the rack gear formed on the top surface of the collimator, and is provided on the frame to move the pinion gear in a front-back direction of the frame and an up-down direction of the frame.
    • 一种用于放射治疗的多叶准直器装置,包括:框架,其具有盒形并且在其顶表面和底表面上形成有通孔; 多个准直器,其被接收在所述框架中,其中每个所述准直器包括形成在所述准直器的顶表面上的齿条,所述准直器围绕所述框架的中心部分在左右方向上对称布置,并且是准直器 可滑动地设置在框架上; 以及运动驱动单元,其包括小齿轮,所述小齿轮形成为能够从形成在所述准直仪的上表面上的齿条拆卸,并且设置在所述框架上以沿所述框架的前后方向移动所述小齿轮; 框架的上下方向。