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81. 发明申请

US20050025008A1 Method for generating header and transition flags using DPD technology and optical device using the same 审中-公开
标题翻译：使用DPD技术生成报头和转换标志的方法以及使用其的光学设备
公开(公告)号：US20050025008A1
公开(公告)日：2005-02-03
申请号：US10928088
申请日：2004-08-30
申请人： Ying-Tzung Wang , Chien-Ming Chen
发明人： Ying-Tzung Wang , Chien-Ming Chen
IPC分类号： G11B7/005 , G11B7/007 , G11B27/19 , G11B27/24 , G11B5/09
CPC分类号： G11B7/005 , G11B7/007 , G11B7/00718 , G11B27/24 , G11B2220/216 , G11B2220/2575
摘要： A method for generating header and groove/land transition flags using the DPD technology and an apparatus using the same are disclosed. The method first sets a first and a second threshold levels. Then, the method generates a phase difference signal. The method generates a first transition flag signal and a second transition flag signal, wherein the first transition flag signal is enabled when the phase difference signal is greater than the first threshold level and the second transition flag signal is enabled when the phase difference signal is smaller than the second threshold level. The method then generates a header flag signal according to the first and the second transition flag signal.
摘要翻译：公开了一种使用DPD技术产生报头和凹槽/平台转换标记的方法及使用其的装置。该方法首先设置第一和第二阈值水平。然后，该方法产生相位差信号。该方法产生第一转变标志信号和第二转变标志信号，其中当相位差信号大于第一阈值电平时第一转变标志信号被使能，并且当相位差信号较小时第二转变标志信号被使能比第二阈值水平高。该方法然后根据第一和第二转变标志信号产生报头标志信号。

82. 发明授权

US06710666B1 Charge pump structure for reducing capacitance in loop filter of a phase locked loop 有权
标题翻译：用于减小锁相环环路滤波器电容的电荷泵结构
公开(公告)号：US06710666B1
公开(公告)日：2004-03-23
申请号：US10065658
申请日：2002-11-07
申请人： Ching-San Wu , Chien-Ming Chen
发明人： Ching-San Wu , Chien-Ming Chen
IPC分类号： H03L789
CPC分类号： H03L7/093 , H03L7/0893
摘要： A charge pump for reducing capacitance in a loop filter of a phase locked loop. The loop filter contains a resistor and a capacitor. The charge pump includes first and second input current sources for supplying first and second currents to the charge pump, a first output current source for receiving the first current from the charge pump, and a second output current source for receiving the second current from the charge pump. The charge pump also contains a plurality of up pulse switches and down pulse switches for controlling current flow through the charge pump such that only a fraction of the current that flows through the resistor of the loop filter flows into and out of the capacitor for charging and discharging the capacitor. The size of the capacitor can be reduced accordingly based on the amount of current used to charge and discharge the capacitor.
摘要翻译：一种用于降低锁相环路滤波器中电容的电荷泵。环路滤波器包含一个电阻和一个电容。电荷泵包括用于向电荷泵供应第一和第二电流的第一和第二输入电流源，用于从电荷泵接收第一电流的第一输出电流源和用于从电荷接收第二电流的第二输出电流源泵。电荷泵还包含多个上行脉冲开关和下降脉冲开关，用于控制通过电荷泵的电流，使得仅流过环路滤波器的电阻器的电流的一部分流入和流出用于充电的电容器，放电电容器。可以根据用于对电容器进行充电和放电的电流量相应地减小电容器的尺寸。

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