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21. 发明授权

US07310023B2 Frequency synthesizer 有权
标题翻译：频率合成器
公开(公告)号：US07310023B2
公开(公告)日：2007-12-18
申请号：US11386696
申请日：2006-03-23
申请人： Choong-yul Cha , Hoon-tae Kim
发明人： Choong-yul Cha , Hoon-tae Kim
IPC分类号： H03B21/02 , H04B1/26
CPC分类号： H04B1/406 , H03L7/18 , H04B1/71632
摘要： A frequency synthesizer in an ultra wide band (UWB) wireless communication system which transmits and receives data through multiband includes a frequency generation means which generates a plurality of frequency signals; and a frequency adjustment means which receives the plurality of frequency signals from the frequency generation means and generates center frequencies of all or part of sub-bands within the UWB through the frequency adjustment. Since all of the center frequencies of the sub-bands are generated, the utilization of the sub-bands can be enhanced for the wideband wireless communication. Furthermore, it is possible to enable the stable UWB communications by flexibly utilizing all of fourteen sub-bands since the sub-bands suffer less from the frequency interference in a complicated and variable wireless frequency environment.
摘要翻译：在通过多频带发送和接收数据的超宽带（UWB）无线通信系统中的频率合成器包括产生多个频率信号的频率产生装置; 以及频率调整装置，其从频率发生装置接收多个频率信号，并通过频率调整产生UWB内的全部或部分子频带的中心频率。由于产生子频带的所有中心频率，所以可以增强对于宽带无线通信的子频带的利用。此外，通过灵活地利用所有14个子带，能够实现稳定的UWB通信，因为子带在复杂且可变的无线频率环境中的频率干扰较少。

22. 发明申请

US20070008429A1 Frequency synthesizer 有权
公开(公告)号：US20070008429A1
公开(公告)日：2007-01-11
申请号：US11386696
申请日：2006-03-23
申请人： Choong-yul Cha , Hoon-tae Kim
发明人： Choong-yul Cha , Hoon-tae Kim
IPC分类号： H04N5/08
CPC分类号： H04B1/406 , H03L7/18 , H04B1/71632
摘要： A frequency synthesizer in an ultra wide band (UWB) wireless communication system which transmits and receives data through multiband includes a frequency generation means which generates a plurality of frequency signals; and a frequency adjustment means which receives the plurality of frequency signals from the frequency generation means and generates center frequencies of all or part of sub-bands within the UWB through the frequency adjustment. Since all of the center frequencies of the sub-bands are generated, the utilization of the sub-bands can be enhanced for the wideband wireless communication. Furthermore, it is possible to enable the stable UWB communications by flexibly utilizing all of fourteen sub-bands since the sub-bands suffer less from the frequency interference in a complicated and variable wireless frequency environment.

23. 发明申请

US20060181349A1 CMOS variable gain amplifier for controlling dB linear gain 失效
标题翻译： CMOS可变增益放大器，用于控制dB线性增益
公开(公告)号：US20060181349A1
公开(公告)日：2006-08-17
申请号：US11339523
申请日：2006-01-26
申请人： Jeongwook Koh , Hoon-tae Kim , Kyoung-sik Seol , Gyu-hyeong Cho
发明人： Jeongwook Koh , Hoon-tae Kim , Kyoung-sik Seol , Gyu-hyeong Cho
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/45188 , H03F3/45197 , H03F2203/45052 , H03F2203/45244 , H03F2203/45318 , H03F2203/45352 , H03F2203/45366 , H03F2203/45458 , H03F2203/45466 , H03F2203/45492 , H03G1/0029
摘要： Provided is a complementary metal oxide semiconductor variable gain amplifier controlling a dB linear gain and a method of controlling the dB linear gain. The complimentary metal oxide semiconductor variable gain amplifier includes: first through fourth transistors differentially receiving first and second input voltages and amplifying the first and second input voltage using a predetermined gain; fifth and sixth transistors controlling a transconductance according to a control voltage to control the predetermined gain; and first and second resistors generating an output voltage having the predetermined gain according to an output current generated by the fifth and sixth transistors.
摘要翻译：提供了控制dB线性增益的互补金属氧化物半导体可变增益放大器和控制dB线性增益的方法。互补金属氧化物半导体可变增益放大器包括：第一至第四晶体管，差分地接收第一和第二输入电压，并使用预定增益放大第一和第二输入电压; 第五和第六晶体管根据控制电压控制跨导以控制预定的增益; 以及根据由第五和第六晶体管产生的输出电流产生具有预定增益的输出电压的第一和第二电阻器。

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