公开(公告)号：US07565124B2

公开(公告)日：2009-07-21

申请号：US11178474

申请日：2005-07-12

Applicant: Junghwan Lee ,  Bonkee Kim

Inventor： Junghwan Lee ,  Bonkee Kim

IPC: H04B1/06 ,  H04B17/00

CPC classification number: H03G3/3068 ,  H04W52/52

Abstract: Disclosed herein is an automatic gain control circuit including a power detector. The automatic gain control circuit includes a receiving unit for receiving an RF signal and a gain control unit for controlling the gain of the receiving unit. The receiving unit comprises an amplification part including a low noise amplifier and a gain amplifier for amplifying the RF signal, a mixer for down-converting and tuning the RF signal output from the gain amplifier, a low pass filter for receiving the down-converted signal from the mixer, and an intermediate frequency variable gain amplifier for amplifying the signal filtered by the low pass filter to an intermediate frequency signal. The gain control unit comprises a received signal strength indicator connected to the output port of the low pass filter to detect the level of the output signal of the low pass filter, a first comparator for comparing the output signal level detected by the received signal strength indicator with a reference signal level, a power detector for detecting the output signal level of the amplification part of the receiving unit, a second comparator for comparing the output signal level detected by the power detector with a reference signal level, and a gain controller for increasing, decreasing or holding the gain in response to the signals output from the first and second comparators.

Abstract translation: 这里公开了一种包括功率检测器的自动增益控制电路。 自动增益控制电路包括用于接收RF信号的接收单元和用于控制接收单元的增益的增益控制单元。 接收单元包括放大部分，其包括低噪声放大器和用于放大RF信号的增益放大器，用于下变频和调谐从增益放大器输出的RF信号的混频器，用于接收下变频信号的低通滤波器 以及用于将由低通滤波器滤波的信号放大到中频信号的中频可变增益放大器。 增益控制单元包括连接到低通滤波器的输出端口的接收信号强度指示器，以检测低通滤波器的输出信号的电平;第一比较器，用于比较由接收信号强度指示器检测的输出信号电平 具有参考信号电平的功率检测器，用于检测接收单元的放大部分的输出信号电平的功率检测器，用于将由功率检测器检测的输出信号电平与参考信号电平进行比较的第二比较器和用于增加的增益控制器 响应于从第一和第二比较器输出的信号减小或保持增益。

公开(公告)号：US07539470B2

公开(公告)日：2009-05-26

申请号：US11392677

申请日：2006-03-30

Applicant: Tae Wook Kim ,  Dong Gu Lim ,  Bonkee Kim ,  Junghwan Lee ,  Kwyro Lee

Inventor： Tae Wook Kim ,  Dong Gu Lim ,  Bonkee Kim ,  Junghwan Lee ,  Kwyro Lee

IPC: H04B1/10 ,  H04B1/16

CPC classification number: H03J3/08 ,  H04B1/10

Abstract: The present invention relates to a filter, and more particularly, to a tracking filter for selecting a channel of a wideband frequency. The tracking filter for selecting a channel of a wideband frequency, which is for increasing the selectivity of a wideband frequency, includes: a first tracking portion for filtering and amplifying a specific frequency band while converting a low input impedance of the input terminal of the tracking filter into a high impedance; a second tracking portion for maintaining the high impedance of the first tracking portion, and for filtering and amplifying the specific frequency band while increasing the selectivity Q of a frequency outputted from the first tracking portion; and a third tracking portion for filtering the specific band wherein has low input impedance and high output impedance.

Abstract translation: 本发明涉及一种滤波器，更具体地说，涉及一种用于选择宽带频率信道的跟踪滤波器。 用于选择用于增加宽带频率的选择性的宽带频率的信道的跟踪滤波器包括：第一跟踪部分，用于在转换跟踪的输入端的低输入阻抗的同时对特定频带进行滤波和放大 滤波器成高阻抗; 用于保持第一跟踪部分的高阻抗的第二跟踪部分，并且用于在增加从第一跟踪部分输出的频率的选择性Q的同时对特定频带进行滤波和放大; 以及用于滤波具有低输入阻抗和高输出阻抗的特定频带的第三跟踪部分。

公开(公告)号：US07463085B2

公开(公告)日：2008-12-09

申请号：US11471678

申请日：2006-06-21

Applicant: Seyeob Kim ,  Minsu Jeong

Inventor： Seyeob Kim ,  Minsu Jeong

IPC: H03K5/00

CPC classification number: H03H11/1291 ,  H03H7/0153 ,  H03H2210/021 ,  H03H2210/043

Abstract: The present invention relates to a filter and, more particularly, to a tuning circuit of a filter for correcting a cut-off frequency of the filter. The tuning circuit comprises a current generation unit having a first transistor and a variable resistor unit, and a capacitance correction unit having a second transistor, a capacitor unit, an up-down counter and a selection unit for selecting a control path of the up-down counter for varying the resistance or capacitance.

Abstract translation: 本发明涉及一种滤波器，更具体地说，涉及用于校正滤波器的截止频率的滤波器的调谐电路。 调谐电路包括具有第一晶体管和可变电阻器单元的电流产生单元，以及具有第二晶体管，电容器单元，升降计数器和选择单元的电容校正单元，用于选择上变频单元的控制路径， 降低计数器，以改变电阻或电容。

公开(公告)号：US07400198B2

公开(公告)日：2008-07-15

申请号：US11178481

申请日：2005-07-12

Applicant: Tae Wook Kim ,  Bonkee Kim ,  Kwyro Lee

Inventor： Tae Wook Kim ,  Bonkee Kim ,  Kwyro Lee

IPC: H03F3/68

CPC classification number: H03F3/505 ,  H03F1/3205 ,  H03F1/3211 ,  H03F3/345 ,  H03F2200/453 ,  H03F2203/5042

Abstract: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate circuit having a drain terminal through which an input signal is output as an output signal, an assistant circuit unit having a common gate circuit in order to assist the linearity of the main circuit unit, a biasing unit for biasing the main circuit unit and the assistant circuit unit, respectively, and load stages connected to output stages of the main circuit unit and the assistant circuit unit, wherein the output stages of the main circuit unit and the assistant circuit unit are coupled to each other.

Abstract translation: 本发明涉及有源电路的改进的线性度，更具体地，涉及使用主电路单元和辅助电路单元具有改进的线性度的有源电路。 根据本发明，公共门电路包括主电路单元，该主电路单元由具有输出信号作为输出信号输出的漏极端子的公共门电路组成，具有公共门电路的辅助电路单元以辅助 主电路单元的线性度，分别用于偏置主电路单元和辅助电路单元的偏置单元和连接到主电路单元和辅助电路单元的输出级的负载级，其中主电路单元和辅助电路单元的输出级 电路单元和辅助电路单元彼此耦合。

公开(公告)号：US07248099B2

公开(公告)日：2007-07-24

申请号：US11303921

申请日：2005-12-19

Applicant: Rajath Kedilaya ,  Minsu Jeong

Inventor： Rajath Kedilaya ,  Minsu Jeong

IPC: G05F1/10 ,  G05F3/02

CPC classification number: G05F3/267

Abstract: Disclosed herein is a circuit for generating reference current. The circuit for generating reference current comprises a current providing unit for generate a PTAT current, mirroring the PTAT current to generate an analogous PTAT current and generate an analogous BGR current, a current ratio control unit for generating an analogous BGR current in a first ratio, a PTAT current in a second ratio, and a current corresponding to the difference between the analogous PTAT current in the second ratio and the analogous BGR current in the first ratio, and a current increasing/decreasing unit for generating a BGR current in the first ratio.

Abstract translation: 这里公开了一种用于产生参考电流的电路。 用于产生参考电流的电路包括用于产生PTAT电流的电流提供单元，镜像PTAT电流以产生类似的PTAT电流并产生类似的BGR电流;电流比率控制单元，用于以第一比率产生类似的BGR电流; 以第二比例的PTAT电流和与第二比率中的类似PTAT电流和第一比率中的类似BGR电流之间的差相对应的电流，以及用于产生第一比率的BGR电流的电流增减单元 。

公开(公告)号：US20070057726A1

公开(公告)日：2007-03-15

申请号：US11467308

申请日：2006-08-25

Applicant: TAE KIM

Inventor： TAE KIM

IPC: H03F3/45

CPC classification number: H03F1/3205 ,  H03F1/0205 ,  H03F2200/357 ,  H03F2200/537 ,  H03F2203/45358

Abstract: Provided is a frequency converter using an amplification circuit that is improved with linearity by coupling a main transistor and an auxiliary transistor in parallel. An amplification circuit that is improved with linearity comprises an input block amplifying an input signal, an induction block inducing a current proportionate to an output signal of the input block and an amplification block comprising. The amplification block comprises a main transistor amplifying the output signal of the induction block, wherein the main transistor is biased to operate at a saturation region and an auxiliary transistor amplifying the output signal of the induction block, wherein the auxiliary transistor is biased to operate at a subthreshold region and coupled to the main transistor in parallel.

Abstract translation: 提供了一种使用通过并联耦合主晶体管和辅助晶体管而线性提高的放大电路的变频器。 以线性方式改进的放大电路包括放大输入信号的输入块，感应与输入块的输出信号成比例的电流的感应块和包括的放大块。 放大块包括放大感应块的输出信号的主晶体管，其中主晶体管被偏置以在饱和区域工作，而辅助晶体管放大感应块的输出信号，其中辅助晶体管被偏置以在 亚阈值区域并且并联耦合到主晶体管。

公开(公告)号：US20060223485A1

公开(公告)日：2006-10-05

申请号：US11392677

申请日：2006-03-30

Applicant: Tae Kim ,  Dong Lim ,  Bonkee Kim ,  Junghwan Lee ,  Kwyro Lee

Inventor： Tae Kim ,  Dong Lim ,  Bonkee Kim ,  Junghwan Lee ,  Kwyro Lee

IPC: H04B1/10 ,  H04B1/16

CPC classification number: H03J3/08 ,  H04B1/10

Abstract: The present invention relates to a filter, and more particularly, to a tracking filter for selecting a channel of a wideband frequency. The tracking filter for selecting a channel of a wideband frequency, which is for increasing the selectivity of a wideband frequency, includes: a first tracking portion for filtering and amplifying a specific frequency band while converting a low input impedance of the input terminal of the tracking filter into a high impedance; a second tracking portion for maintaining the high impedance of the first tracking portion, and for filtering and amplifying the specific frequency band while increasing the selectivity Q of a frequency outputted from the first tracking portion; and a third tracking portion for filtering the specific band wherein has low input impedance and high output impedance.

公开(公告)号：US07103341B2

公开(公告)日：2006-09-05

申请号：US10349913

申请日：2003-01-24

Applicant: Sunguk Kim ,  Yongseok Kim

Inventor： Sunguk Kim ,  Yongseok Kim

IPC: H04B1/10

CPC classification number: H04B1/109

Abstract: The present invention relates to a harmonic circuit for improving linearity, the harmonic circuit according to the present invention comprises a first terminal connected to a collector of a NPN transistor and a second terminal connected to an emitter of the NPN transistor, and removes inter-modulation noise from the signal appeared at the collector of the NPN transistor. The harmonic circuit includes a PNP transistor, a first resistor, and a second resistor. The PNP transistor generates harmonic components without affecting the main signal, and the harmonic components that are generated by the PNP transistor compensate the harmonic components that are generated by the NPN transistor by having load of different sign from the load of the harmonic components that are generated by the NPN transistor. In addition, the harmonic circuit further includes a phase shifter to compensate the phase distortion that is generated from non-linear devices, and it can reduce the inter-modulation noise more minutely by implementing the PNP transistor using a plurality of Darlington-connected PNP transistors.

Abstract translation: 本发明涉及一种用于提高线性度的谐波电路，根据本发明的谐波电路包括连接到NPN晶体管的集电极的第一端子和连接到NPN晶体管的发射极的第二端子，并且去除互调 来自信号的噪声出现在NPN晶体管的集电极上。 谐波电路包括PNP晶体管，第一电阻器和第二电阻器。 PNP晶体管产生谐波分量而不影响主信号，由PNP晶体管产生的谐波分量通过从产生的谐波分量的负载产生不同符号的负载来补偿由NPN晶体管产生的谐波分量 由NPN晶体管。 此外，谐波电路还包括用于补偿从非线性器件产生的相位失真的移相器，并且可以通过使用多个达林顿连接的PNP晶体管实现PNP晶体管来更精细地减小互调噪声 。

公开(公告)号：US20060033574A1

公开(公告)日：2006-02-16

申请号：US11201429

申请日：2005-08-11

Applicant: Tae Kim ,  Bonkee Kim ,  Kwyro Lee

Inventor： Tae Kim ,  Bonkee Kim ,  Kwyro Lee

IPC: H03G3/30

CPC classification number: H03G1/0088

Abstract: Disclosed is a high linearity programmable gain amplifier using a switch, including an attenuating portion for controlling a gain of a signal and an amplifying portion having a first amplifying part and a second amplifying part, for amplifying an input signal and outputting a signal amplified, wherein the first amplifying part has a first amplifier for amplifying an input signal and a first switch for activating the first amplifier and the second amplifying part has a second amplifier for amplifying an input signal and a second switch for activating the second amplifier.

Abstract translation: 公开了一种使用开关的高线性可编程增益放大器，包括用于控制信号增益的衰减部分和具有第一放大部分和第二放大部分的放大部分，用于放大输入信号并输出​​放大的信号，其中 第一放大部分具有用于放大输入信号的第一放大器和用于激活第一放大器的第一开关，第二放大部分具有用于放大输入信号的第二放大器和用于启动第二放大器的第二开关。

公开(公告)号：US20040056712A1

公开(公告)日：2004-03-25

申请号：US10633589

申请日：2003-08-05

Applicant: Integrant Technologies Inc.

Inventor： Kwyro Lee ,  Tae Wook Kim

IPC: H03F001/14 ,  H03G003/20

CPC classification number: H03G1/0088 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/7236

Abstract: This present invention is related to a variable gain low noise amplifier which is operated to the best operation of input matching, gain and noise characteristics, linearity. The variable gain low noise amplifier according to an embodiment of the present invention includes a first amplifying cell operated in high gain mode, second amplifying cell operated in low gain mode, selectively matching circuit, and fist short-circuit means. It is provided to the variable gain low noise amplifier according to the present invention for operating the best operation in each gain mode so that the circuit operated in high and low gain modes is not affect to a load with each other.

Abstract translation: 本发明涉及一种可变增益低噪声放大器，其以输入匹配，增益和噪声特性，线性度的最佳操作来操作。 根据本发明实施例的可变增益低噪声放大器包括以高增益模式操作的第一放大单元，以低增益模式操作的第二放大单元，选择性匹配电路和第一短路装置。 提供给根据本发明的可变增益低噪声放大器，用于在每个增益模式中操作最佳操作，使得以高和低增益模式操作的电路不会相互影响负载。