会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Differential mixer injection with optional step gain control
    • 差分混合器注入,可选步进增益控制
    • US06819914B2
    • 2004-11-16
    • US10072374
    • 2002-02-07
    • Kelvin Kai Tuan YanKihong KimLuke Joseph
    • Kelvin Kai Tuan YanKihong KimLuke Joseph
    • H04B126
    • H04B1/28H03D7/145H03D7/1458H03D7/165H03D2200/0025H03G1/0088
    • A differential RF input signal drives the plus and minus terminals of a center tapped primary winding, which couples the differential RF input signal to the plus and minus terminals of a center tapped secondary winding. From the secondary winding, the coupled, differential RF signal drives a double-balanced mixer core operating in response to a differential local oscillator signal. The output of the mixer core is a differential IF signal representative of the differential RF input signal down-converted at the local oscillator frequency. A step reduction in gain associated with the RF input signal may be implemented using bypass circuitry coupled across the primary of the transformer, wherein a relatively small resistance or impedance is coupled across the primary to effectively reduce the load of the differential amplifiers driving the primary.
    • 差分RF输入信号驱动中心抽头初级绕组的正负端子,将初级绕组的差分RF输入信号耦合到中心抽头次级绕组的正负端子。 从次级绕组,耦合的差分RF信号驱动响应于差分本地振荡器信号而工作的双平衡混频器核。 混频器内核的输出是表示以本地振荡器频率下变频的差分RF输入信号的差分IF信号。 与RF输入信号相关联的增益的阶跃降低可以使用跨越变压器的初级绕组耦合的旁路电路来实现,其中相对较小的电阻或阻抗跨越初级耦合,以有效地减小驱动初级的差分放大器的负载。
    • 3. 发明授权
    • Cache-conscious concurrency control scheme for database systems
    • 数据库系统的缓存意识并发控制方案
    • US07293028B2
    • 2007-11-06
    • US10162731
    • 2002-06-04
    • Sang K. ChaSangyong HwangKihong KimKeunjoo Kwon
    • Sang K. ChaSangyong HwangKihong KimKeunjoo Kwon
    • G06F7/00G06F17/30
    • G06F17/30356G06F17/30351Y10S707/99933
    • An optimistic, latch-free index traversal (“OLFIT”) concurrency control scheme is disclosed for an index structure for managing a database system. In each node of an index tree, the OLFIT scheme maintains a latch, a version number, and a link to the next node at the same level of the index tree. Index traversal involves consistent node read operations starting from the root. To ensure the consistency of node read operations without latching, every node update operation first obtains a latch and increments the version number after update of the node contents. Every node read operation begins with reading the version number into a register and ends with verifying if the current version number is consistent with the register-stored version number. If they are the same, the read operation is consistent. Otherwise, the node read is retried until the verification succeeds. The concurrency control scheme of the present invention is applicable to many index structures such as the B+-tree and the CSB+-tree.
    • 公开了一种用于管理数据库系统的索引结构的乐观,无锁定索引遍历(“OLFIT”)并发控制方案。 在索引树的每个节点中,OLFIT方案维护锁存器,版本号和到索引树的同一级别的下一个节点的链接。 索引遍历涉及从根开始的一致的节点读取操作。 为了确保节点读取操作的一致性,无需锁存,每个节点更新操作首先获取锁存器,并在更新节点内容后增加版本号。 每个节点读取操作都从读取寄存器中的版本号开始,并结束验证当前版本号是否与寄存器存储的版本号一致。 如果它们相同,则读取操作是一致的。 否则,重新尝试节点读取,直到验证成功。 本发明的并发控制方案适用于诸如B +树和CSB +树的许多索引结构。
    • 7. 发明授权
    • Method and apparatus for optical frequency demodulation of an optical signal using interferometry
    • 使用干涉测量法对光信号进行光频解调的方法和装置
    • US06271959B1
    • 2001-08-07
    • US09338530
    • 1999-06-23
    • Kihong KimBruce Richardson
    • Kihong KimBruce Richardson
    • G02F200
    • H04B10/69H04B10/67H04B10/676
    • The present invention provides an improved optical frequency demodulation technique for extracting overhead information from an optical channel signal carrying both high bit rate payload and low rate overhead data. The invention makes use of asymmetrical Mach-Zehnder interferometry (AMZI) in an optical frequency demodulator to efficiently extract the overhead information from the optical channel signal by frequency discrimination without necessitating a complete demodulation of the optical channel signal. By comparison to existing demodulation schemes, the invention provides an all-optical low cost, high gain technique for recovering the overhead data which improves the payload signal-to-noise ratio and enhance performance.
    • 本发明提供了一种用于从承载高比特率有效载荷和低速率开销数据的光信道信号中提取开销信息的改进的光频解调技术。 本发明利用光频解调器中的非对称马赫曾德尔干涉法(AMZI),通过频率鉴别有效地从光通道信号中提取开销信息,而不必对光信道信号进行完全解调。 与现有的解调方案相比,本发明提供了一种用于恢复开销数据的全光低成本,高增益技术,其提高了有效载荷信噪比并提高了性能。
    • 10. 发明申请
    • CACHE-CONSCIOUS CONCURRENCY CONTROL SCHEME FOR DATABASE SYSTEMS
    • 数据库系统的高速缓存控制方案
    • US20080065670A1
    • 2008-03-13
    • US11934986
    • 2007-11-05
    • Sang ChaSangyong HwangKihong KimKeunjoo Kwon
    • Sang ChaSangyong HwangKihong KimKeunjoo Kwon
    • G06F17/30
    • G06F17/30356G06F17/30351Y10S707/99933
    • An optimistic, latch-free index traversal (“OLFIT”) concurrency control scheme is disclosed for an index structure for managing a database system. In each node of an index tree, the OLFIT scheme maintains a latch, a version number, and a link to the next node at the same level of the index tree. Index traversal involves consistent node read operations starting from the root. To ensure the consistency of node read operations without latching, every node update operation first obtains a latch and increments the version number after update of the node contents. Every node read operation begins with reading the version number into a register and ends with verifying if the current version number is consistent with the register-stored version number. If they are the same, the read operation is consistent. Otherwise, the node read is retried until the verification succeeds. The concurrency control scheme of the present invention is applicable to many index structures such as the B+-tree and the CSB+-tree.
    • 公开了一种用于管理数据库系统的索引结构的乐观,无锁定索引遍历(“OLFIT”)并发控制方案。 在索引树的每个节点中,OLFIT方案维护锁存器,版本号和到索引树的同一级别的下一个节点的链接。 索引遍历涉及从根开始的一致的节点读取操作。 为了确保节点读取操作的一致性,无需锁存,每个节点更新操作首先获取锁存器,并在更新节点内容后增加版本号。 每个节点读取操作都从读取寄存器中的版本号开始,并结束验证当前版本号是否与寄存器存储的版本号一致。 如果它们相同,则读取操作是一致的。 否则,重新尝试节点读取,直到验证成功。 本发明的并发控制方案适用于诸如B +树和CSB +树的许多索引结构。