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    • 4. 发明申请
    • Wireless LAN device and method of monitoring status of wireless LAN
    • 无线局域网设备及无线局域网状态监控方法
    • US20060126586A1
    • 2006-06-15
    • US11281367
    • 2005-11-18
    • Soung UmDong KwakHyeon ChoDong HahnHee LeeMin Hwang
    • Soung UmDong KwakHyeon ChoDong HahnHee LeeMin Hwang
    • H04Q7/24
    • H04W24/00H04L1/0014H04L1/0015H04L1/0026H04L1/20H04W84/12
    • A wireless LAN device and a method of monitoring the status of a wireless LAN are disclosed. The wireless LAN device according to the present invention can determine the status of a wireless LAN using a variety of information obtained by performing media access control (MAC) without additional packet transmission/reception with a correspondent wireless LAN device. Accordingly, if the wireless LAN device of the present invention is various kinds of wireless A/V (Audio/Video) devices that provide the A/V streaming, the data transmission can be optimally made in accordance with the status of the monitored wireless LAN. Further, since there is no additional communication needed to monitor the status of a wireless LAN, the present invention has advantages in that the processing speed of the wireless LAN device is improved and the traffic of the wireless LAN is not increased.
    • 公开了一种无线LAN设备和监视无线LAN的状态的方法。 根据本发明的无线LAN设备可以使用通过执行媒体访问控制(MAC)获得的各种信息来确定无线LAN的状态,而无需对通信无线LAN设备的附加分组发送/接收。 因此,如果本发明的无线LAN设备是提供A / V流传输的各种无线A / V(音频/视频)设备,则可以根据所监视的无线LAN的状态来最佳地进行数据传输 。 此外,由于不需要额外的通信来监视无线LAN的状态,因此本发明的优点在于,提高了无线LAN设备的处理速度,并且无法增加无线LAN的流量。
    • 8. 发明申请
    • Method of preparing mixed formulation of sustained release microspheres by continuous one-step process
    • 通过连续一步法制备缓释微球混合制剂的方法
    • US20070059363A1
    • 2007-03-15
    • US10562379
    • 2004-06-25
    • Hee LeeSung KimJung KimJi LeeYoung JungJun KimYun SeoHo-Il ChoiSeung ChangKee Park
    • Hee LeeSung KimJung KimJi LeeYoung JungJun KimYun SeoHo-Il ChoiSeung ChangKee Park
    • A61K38/17A61K9/22
    • A61K9/1694A61K9/1647A61K9/5084A61K38/24
    • Disclosed is a method for preparing a mixed formulation of sustained release microspheres with various compositions by a continuous one-step process. The present method is characterized by preparing the mixed formulation of sustained release microspheres with different compositions by a continuous one-step process by continuously introducing the mixed fluids into a dryer from the two or more different fluids for preparation of sustained release microspheres containing a biodegradable polymer, a drug, an additive and a solvent with different types of contents or both of the components, by controlling the mixing ratios of the fluids according to the time, unlike a conventional method including spray-drying a mixture of microspheres containing a biodegradable polymer, a drug, an additive and a solvent with a single composition. The present method can achieve a desired drug release, which is difficult to be obtained by conventional microspheres with a single composition, by preparing microspheres by a continuous one-step process, and can simplify the conventional complex process of separately preparing several microsphere formulations and then mixing the formulations at a proper ratio to achieve a desired drug release.
    • 公开了通过连续一步法制备具有各种组成的缓释微球混合制剂的方法。 本发明的方法的特征在于通过连续一步法制备具有不同组成的缓释微球的混合制剂,通过从两种或更多种不同的流体连续引入混合流体到干燥器中,用于制备含有可生物降解聚合物的缓释微球 ,药物,添加剂和具有不同类型含量的溶剂或两种组分的溶剂通过控制流体的混合比而不同于常规方法,包括喷雾干燥含有可生物降解的聚合物的微球体的混合物, 药物,添加剂和具有单一组成的溶剂。 本发明方法可以通过连续一步法制备微球,实现通过具有单一组成的常规微球难以获得的所需药物释放,并且可以简化分别制备几种微球制剂的常规复合方法,然后 以适当的比例混合制剂以实现期望的药物释放。
    • 9. 发明申请
    • Direct-conversion frequency mixer
    • 直接转换混频器
    • US20060088122A1
    • 2006-04-27
    • US11226045
    • 2005-09-14
    • Byoung ChoiSeok HyunGeum TakHee LeeSeong-Su ParkChul Park
    • Byoung ChoiSeok HyunGeum TakHee LeeSeong-Su ParkChul Park
    • H04L27/18
    • H03D7/1441H03D7/1491H03D7/165H03D2200/0084
    • Provided is a direct-conversion frequency mixer for down converting a radio frequency (RF) signal into a baseband signal, in which a single phase RF signal and a quadrature location oscillation (quadrature LO) signal are used to generate the baseband signal, the frequency mixer comprising a first frequency mixing unit that uses quadrature LO signals having respective phases of 0 degrees and 180 degrees to directly down-convert the single phase RF signal into the in-phase baseband signal, and a second frequency mixing unit that uses quadrature LO signals having respective phases of 90 degrees and 270 degrees to directly down-convert the single phase RF signal into the quadrature-phase baseband signal, whereby drains and sources of the transistor for receiving the quadrature LO signaland the transistor for receiving the RF signal are connected in common, thus enabling low power source voltage driving.
    • 提供了一种用于将射频(RF)信号下变频为基带信号的直接转换混频器,其中使用单相RF信号和正交位置振荡(正交LO)信号来产生基带信号,频率 混频器,其包括使用具有0度和180度的相位的正交LO信号的第一频率混合单元,以将单相RF信号直接下变频为同相基带信号;以及第二混频单元,其使用正交LO信号 具有90度和270度的各个相位以将单相RF信号直接下变频为正交相位基带信号,由此用于接收正交LO信号的晶体管的漏极和源极以及用于接收RF信号的晶体管被​​连接在 通用,从而实现低电源电压驱动。