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1. 发明授权

US06850748B2 RF front end with reduced carrier leakage 有权
标题翻译：射频前端具有减少的载波泄漏
公开(公告)号：US06850748B2
公开(公告)日：2005-02-01
申请号：US10207986
申请日：2002-07-31
申请人： Eunseok Song , Seung-Wook Lee , Jeong-Woo Lee , Joonbae Park , Kyeongho Lee
发明人： Eunseok Song , Seung-Wook Lee , Jeong-Woo Lee , Joonbae Park , Kyeongho Lee
IPC分类号： H04B1/28 , H04B1/52 , H04B1/00
CPC分类号： H04B1/28 , H04B1/525
摘要： A method and apparatus that provide a frequency conversion in a radio frequency front-end are disclosed, including a frequency divider that divides an input signal frequency by a predetermined value to produce an output signal frequency; and a frequency mixer that mixes the output signal frequency with a carrier signal frequency to produce a converted signal frequency, which is substantially equal to a difference between the output signal frequency and the carrier signal frequency. The predetermined value and the input signal frequency are selected such that the carrier signal frequency is not substantially equivalent to an integer multiple of the output signal frequency. The method and apparatus can be used in a wireless communication receiver including wireless communication systems and wireless LAN systems.
摘要翻译：公开了一种在射频前端提供频率转换的方法和装置，包括将输入信号频率除以预定值以产生输出信号频率的分频器; 以及混频器，其将输出信号频率与载波信号频率进行混合，以产生基本上等于输出信号频率和载波信号频率之差的转换信号频率。选择预定值和输入信号频率使得载波信号频率基本上不等于输出信号频率的整数倍。该方法和装置可用于包括无线通信系统和无线LAN系统的无线通信接收机。

2. 发明申请

US20080252377A1 Low noise amplifier having improved linearity 有权
标题翻译：低噪声放大器具有改善的线性度
公开(公告)号：US20080252377A1
公开(公告)日：2008-10-16
申请号：US11976911
申请日：2007-10-29
申请人： Seung-Wook Lee , Deok Hee Lee , Eunseok Song , Joonbae Park , Kyeongho Lee
发明人： Seung-Wook Lee , Deok Hee Lee , Eunseok Song , Joonbae Park , Kyeongho Lee
IPC分类号： H03G3/30 , H04B1/16
CPC分类号： H03F1/223 , H03F3/193 , H03F2200/372
摘要： Embodiments of the present general inventive concept include a low noise amplifier and method with an improved linearity while reducing a noise disadvantage (e.g., increase). One embodiment of a low noise amplifier can include a first transistor to receive an input signal at a control terminal thereof, a second transistor having a first terminal coupled to a second terminal of the first transistor, an envelope detector to output a control signal corresponding to a characteristic of the input signal and an envelope amplifier to amplify the control signal to be applied to a control terminal of the second transistor.
摘要翻译：本发明总体构思的实施例包括具有改善的线性度的低噪声放大器和方法，同时降低噪声不利（例如增加）。低噪声放大器的一个实施例可以包括在其控制端接收输入信号的第一晶体管，具有耦合到第一晶体管的第二端的第一端的第二晶体管，用于输出对应于输入信号的特性和包络放大器，放大要施加到第二晶体管的控制端的控制信号。

3. 发明授权

US07812672B2 Low noise amplifier having improved linearity 有权
标题翻译：低噪声放大器具有改善的线性度
公开(公告)号：US07812672B2
公开(公告)日：2010-10-12
申请号：US11976911
申请日：2007-10-29
申请人： Seung-Wook Lee , Deok Hee Lee , Eunseok Song , Joonbae Park , Kyeongho Lee
发明人： Seung-Wook Lee , Deok Hee Lee , Eunseok Song , Joonbae Park , Kyeongho Lee
IPC分类号： H03F3/30
CPC分类号： H03F1/223 , H03F3/193 , H03F2200/372
摘要： Embodiments of the present general inventive concept include a low noise amplifier and method with an improved linearity while reducing a noise disadvantage (e.g., increase). One embodiment of a low noise amplifier can include a first transistor to receive an input signal at a control terminal thereof, a second transistor having a first terminal coupled to a second terminal of the first transistor, an envelope detector to output a control signal corresponding to a characteristic of the input signal and an envelope amplifier to amplify the control signal to be applied to a control terminal of the second transistor.
摘要翻译：本发明总体构思的实施例包括具有改善的线性度的低噪声放大器和方法，同时降低噪声不利（例如增加）。低噪声放大器的一个实施例可以包括在其控制端接收输入信号的第一晶体管，具有耦合到第一晶体管的第二端的第一端的第二晶体管，用于输出对应于输入信号的特性和包络放大器，放大要施加到第二晶体管的控制端的控制信号。

4. 发明授权

US08243579B2 OFDM receiving circuit having multiple demodulation paths using oversampling analog-to-digital converter 有权
标题翻译： OFDM接收电路具有使用过采样模数转换器的多个解调路径
公开(公告)号：US08243579B2
公开(公告)日：2012-08-14
申请号：US11976909
申请日：2007-10-29
申请人： Seung-Wook Lee , Joonbae Park , Jeong Woo Lee , Su Won Kang , Kyeongho Lee
发明人： Seung-Wook Lee , Joonbae Park , Jeong Woo Lee , Su Won Kang , Kyeongho Lee
IPC分类号： H04J11/00
CPC分类号： H04L27/2647
摘要： Embodiments according to the application relates to an OFDM (orthogonal frequency division multiplexing) receiving circuit and methods thereof configured to have a plurality of demodulation paths for an oversampling ADC, which can increase or improve an overall performance of the circuit.
摘要翻译：根据本申请的实施例涉及一种OFDM（正交频分复用）接收电路及其方法，被配置为具有用于过采样ADC的多个解调路径，其可以增加或提高电路的整体性能。

5. 发明授权

US07995645B2 Apparatus for measuring in-phase and quadrature (IQ) imbalance 有权
标题翻译：用于测量同相和正交（IQ）不平衡的装置
公开(公告)号：US07995645B2
公开(公告)日：2011-08-09
申请号：US12027762
申请日：2008-02-07
申请人： Kyeongho Lee , Joonbae Park , Jeong Woo Lee , Seung-Wook Lee , Eal Wan Lee
发明人： Kyeongho Lee , Joonbae Park , Jeong Woo Lee , Seung-Wook Lee , Eal Wan Lee
IPC分类号： H04B3/46
CPC分类号： H03D7/166 , H03D3/009 , H04L25/061 , H04L27/364 , H04L27/3863 , H04L2027/0016
摘要： The present general inventive concept relates to apparatuses and/or methods for measuring an in-phase and quadrature (IQ) imbalance. In one embodiment, a signal generator can provide a first IQ signal of a DC component during a first period and the first IQ signal of a first angular frequency during a second period, an IQ up-conversion mixer can up-convert the first IQ signal by a second angular frequency during the first period and up-convert the first IQ signal by a third angular frequency during the second period to output a second IQ signal, an IQ down-conversion mixer can down-convert the second IQ signal by the third angular frequency to output a third IQ signal and an IQ imbalance detector can obtain a first IQ imbalance (e.g., Rx IQ imbalance) from the third IQ signal during the first period and a second IQ imbalance (e.g., Tx/Rx IQ imbalance) during the second period.
摘要翻译：本总体发明构思涉及用于测量同相和正交（IQ）不平衡的装置和/或方法。在一个实施例中，信号发生器可以在第一周期期间提供DC分量的第一IQ信号，并且在第二周期期间提供第一角频率的第一IQ信号，IQ上变频混频器可以上变频第一IQ信号在第一周期期间以第二角度频率进行第二角度频率，并且在第二周期期间将第一IQ信号上升转换第三角度频率以输出第二IQ信号，IQ降频转换混频器可以将第二IQ信号下变频第三IQ信号输出第三IQ信号和IQ不平衡检测器的角频率可以在第一周期期间从第三IQ信号和第二IQ不平衡（例如，Tx / Rx IQ不平衡）获得第一IQ不平衡（例如，Rx IQ不平衡）第二期。

6. 发明申请

US20060068737A1 Sigma-delta based phase lock loop 有权
公开(公告)号：US20060068737A1
公开(公告)日：2006-03-30
申请号：US11227909
申请日：2005-09-16
申请人： Yido Koo , Youngho Ahn , Eunseok Song , Jeong-Woo Lee , Joonbae Park , Kyeongho Lee
发明人： Yido Koo , Youngho Ahn , Eunseok Song , Jeong-Woo Lee , Joonbae Park , Kyeongho Lee
IPC分类号： H04B1/40 , H04B7/00 , H03D3/24 , H04B1/06
CPC分类号： H03L7/0895 , H03L7/1976
摘要： A sigma-delta based phase lock loop device is provided that includes a phase frequency detector (PFD), a charge pump and a voltage controlled oscillator. The PFD to receive a reference signal and a feedback signal and to output signals based on a comparison of the reference signal and the feedback signal. The charge pump to output a charge based on the output signals from the PFD. The charge pump including a first current source to apply a fixed amount of current and a second current source to apply a variable amount of current. The voltage controlled oscillator to output a clock signal based on the received charge from the charge pump.

7. 发明授权

US07202741B2 Highly linear variable gain amplifier 有权
标题翻译：高线性可变增益放大器
公开(公告)号：US07202741B2
公开(公告)日：2007-04-10
申请号：US11066546
申请日：2005-02-28
申请人： Joonbae Park , Seung-Wook Lee , Jeong-Woo Lee , Kyeongho Lee
发明人： Joonbae Park , Seung-Wook Lee , Jeong-Woo Lee , Kyeongho Lee
IPC分类号： H03F3/45
CPC分类号： H03F3/211 , H03F3/45475 , H03F3/45659 , H03F2203/45136 , H03F2203/45138 , H03F2203/45166 , H03F2203/45168 , H03F2203/45434 , H03F2203/45522 , H03F2203/45591
摘要： A variable-gain amplifier circuit uses a pair of single-ended operational amplifiers to amplify complementary portions of a differential input signal. By using two single-ended amplifiers instead of a single differential amplifier, linearity is significantly improved. In addition, common mode feedback circuitry is eliminated along with harmonic distortion and other forms of noise which tend to negative affect the quality of the signal output from the circuit.
摘要翻译：可变增益放大器电路使用一对单端运算放大器来放大差分输入信号的互补部分。通过使用两个单端放大器而不是单个差分放大器，线性度显着提高。此外，消除共模反馈电路以及谐波失真和其他形式的噪声，这些噪声倾向于负面影响从电路输出的信号的质量。

8. 发明申请

US20060001489A1 Highly linear variable gain amplifier 有权
标题翻译：高线性可变增益放大器
公开(公告)号：US20060001489A1
公开(公告)日：2006-01-05
申请号：US11066546
申请日：2005-02-28
申请人： Joonbae Park , Seung-Wook Lee , Jeong-Woo Lee , Kyeongho Lee
发明人： Joonbae Park , Seung-Wook Lee , Jeong-Woo Lee , Kyeongho Lee
IPC分类号： H03F3/45
CPC分类号： H03F3/211 , H03F3/45475 , H03F3/45659 , H03F2203/45136 , H03F2203/45138 , H03F2203/45166 , H03F2203/45168 , H03F2203/45434 , H03F2203/45522 , H03F2203/45591
摘要： A variable-gain amplifier circuit uses a pair of single-ended operational amplifiers to amplify complementary portions of a differential input signal. By using two single-ended amplifiers instead of a single differential amplifier, linearity is significantly improved. In addition, common mode feedback circuitry is eliminated along with harmonic distortion and other forms of noise which tend to negative affect the quality of the signal output from the circuit.
摘要翻译：可变增益放大器电路使用一对单端运算放大器来放大差分输入信号的互补部分。通过使用两个单端放大器而不是单个差分放大器，线性度显着提高。此外，消除共模反馈电路以及谐波失真和其他形式的噪声，这些噪声倾向于负面影响从电路输出的信号的质量。

9. 发明申请

US20050048928A1 System and method for filtering signals in a transceiver 有权
标题翻译：用于对收发器中的信号进行滤波的系统和方法
公开(公告)号：US20050048928A1
公开(公告)日：2005-03-03
申请号：US10927013
申请日：2004-08-27
申请人： Young-Deuk Jeon , Seung-Wook Lee , Jeong-Woo Lee , Joonbae Park , Kyeongho Lee
发明人： Young-Deuk Jeon , Seung-Wook Lee , Jeong-Woo Lee , Joonbae Park , Kyeongho Lee
IPC分类号： H04B1/38
CPC分类号： H04B1/1027 , H03H11/1252 , H03H11/1291 , H03J1/0008 , H04B1/44
摘要： A system and method for filtering signals in a communications system reduces hardware and chip size requirements by selectively connecting a filter along transmitter and receiver paths of a transceiver. In operation, a controller generated signals for connecting the filter along the transmitter path when the transceiver is in transmitter mode and for connecting the filter along the receiver path when the transmitter is in receiver mode. The controller then generates additional signals for setting one or more parameters of the filter based on the path connected, or put differently based on the operational mode of the transceiver. In a variation, the controller sets the parameters of additional elements coupled to the filter as a way of further controlling processing of the transmitter and receiver signals. The system and method are particularly well suited to controlling the filtering of signals at the front-end of the transceiver having a direct-conversion architecture and in general ones performing time-multiplexing applications.
摘要翻译：用于对通信系统中的信号进行滤波的系统和方法通过沿收发器的发射机和接收机路径选择性地连接滤波器来降低硬件和芯片尺寸的要求。在操作中，当收发器处于发射机模式时，控制器产生用于沿着发射机路径连接滤波器的信号，并且当发射机处于接收机模式时，控制器沿着接收机路径连接滤波器。然后，控制器产生附加信号，用于基于连接的路径设置滤波器的一个或多个参数，或者基于收发器的操作模式进行不同的设置。在一个变型中，控制器设置耦合到滤波器的附加元件的参数作为进一步控制发射机和接收机信号的处理的一种方式。该系统和方法特别适用于控制在具有直接转换架构的收发器的前端处的信号的滤波，并且通常执行时间复用应用。

10. 发明申请

US20080253470A1 OFDM receiving circuit having multiple demodulation paths 审中-公开
标题翻译： OFDM接收电路具有多个解调路径
公开(公告)号：US20080253470A1
公开(公告)日：2008-10-16
申请号：US11976910
申请日：2007-10-29
申请人： Seung Wook Lee , Joonbae Park , Jeong Woo Lee , Su Won Kang , Kyeongho Lee
发明人： Seung Wook Lee , Joonbae Park , Jeong Woo Lee , Su Won Kang , Kyeongho Lee
IPC分类号： H04L27/28
CPC分类号： H04L27/2649
摘要： Embodiments according to the application relate to an OFDM (orthogonal frequency division multiplexing) receiving circuit and methods thereof configured to have a plurality of demodulation paths, which can increase or improve a performance of an ADC and/or a filter.
摘要翻译：根据本申请的实施例涉及OFDM（正交频分复用）接收电路及其配置为具有多个解调路径的方法，其可以增加或改善ADC和/或滤波器的性能。

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