公开(公告)号：US08093948B2

公开(公告)日：2012-01-10

申请号：US12883941

申请日：2010-09-16

申请人： Yoo Hwan Kim ,  Yoo Sam Na ,  Byeong Hak Jo ,  Hyun Hwan Yoo

发明人： Yoo Hwan Kim ,  Yoo Sam Na ,  Byeong Hak Jo ,  Hyun Hwan Yoo

IPC分类号： H03G3/20

CPC分类号： H03F1/0266 ,  H03F1/0272 ,  H03F1/56 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/435 ,  H03G3/3042

摘要： There is provided a power amplifier that can maintain a constant gain by detecting a level of a signal being input and a level of a signal being output. A power amplifier according to an aspect of the invention may include: an amplification section having at least one amplification unit amplifying an input signal according to an adjustable gain to thereby output the amplified input signal; a detection section detecting signal levels of an input signal and an output signal of the amplification section; and a gain maintaining section controlling a bias power according to a detection result of the detection section so that a gain of the amplification section is maintained within a predetermined gain range.

摘要翻译： 提供了一种功率放大器，其可以通过检测输入的信号的电平和正在输出的信号的电平来保持恒定的增益。 根据本发明的一个方面的功率放大器可以包括：放大部分，具有至少一个放大单元，根据可调增益放大输入信号，从而输出放大的输入信号; 检测部，检测所述放大部的输入信号和输出信号的信号电平; 以及增益维持部，根据检测部的检测结果来控制偏置功率，使得放大部的增益保持在规定的增益范围内。

公开(公告)号：US08183928B2

公开(公告)日：2012-05-22

申请号：US13069652

申请日：2011-03-23

申请人： Yoo Hwan Kim ,  Hyun Hwan Yoo ,  Yoo Sam Na ,  Byeong Hak Jo

发明人： Yoo Hwan Kim ,  Hyun Hwan Yoo ,  Yoo Sam Na ,  Byeong Hak Jo

IPC分类号： H03F3/04

CPC分类号： H03F1/30 ,  H03F1/303 ,  H03F2200/447 ,  H03F2200/468

摘要： Disclosed is a CMOS power amplifier. A temperature compensation circuit of a CMOS power amplifier may include: a bias circuit unit supplying a gate bias voltage to a power amplification circuit part; a bias detection unit determining a class type of the power amplification circuit part according to the gate bias voltage; a temperature detection unit detecting a temperature-proportional voltage in proportion to ambient temperature; a temperature compensation control unit generating a compensation control value according to the temperature-proportion voltage in the class type determined by the bias detection unit; and a conversion unit converting the compensation control value of the temperature compensation control unit into a linear bias control value and providing the linear bias control value to the bias circuit unit, wherein the bias circuit unit compensates the gate bias voltage according to the linear bias control value of the conversion unit.

摘要翻译： 公开了一种CMOS功率放大器。 CMOS功率放大器的温度补偿电路可以包括：向功率放大电路部分提供栅极偏置电压的偏置电路单元; 偏置检测单元，根据栅极偏置电压确定功率放大电路部分的类别; 温度检测单元，其与环境温度成比例地检测温度成比例的电压; 温度补偿控制单元，根据由偏置检测单元确定的类别中的温度比例电压产生补偿控制值; 以及转换单元，将所述温度补偿控制单元的补偿控制值转换为线性偏置控制值，并将所述线性偏置控制值提供给所述偏置电路单元，其中所述偏置电路单元根据所述线性偏置控制来补偿所述栅极偏置电压 转换单位的价值。

公开(公告)号：US07973606B2

公开(公告)日：2011-07-05

申请号：US12563903

申请日：2009-09-21

申请人： Yoo Hwan Kim ,  Yoo Sam Na ,  Byeong Hak Jo

发明人： Yoo Hwan Kim ,  Yoo Sam Na ,  Byeong Hak Jo

IPC分类号： H03L7/06 ,  H03L7/08 ,  H03L7/085 ,  H03L7/087 ,  H03L7/18

CPC分类号： H03L7/1976 ,  H03L7/087

摘要： The present relates to a fractional-N frequency synthesizer improving noise characteristics and a method thereof. The fractional-N frequency synthesizer includes a reference oscillator that generates a reference frequency signal; a sigma-delta modulator that generates a desired decimal value based on the reference frequency signal; a divider that divides a voltage controlled oscillation frequency signal; first to M phase/frequency detectors that detect a difference in phase and frequency between the reference frequency signal and the divided voltage controlled oscillation frequency signal; first to M charge pumps that are connected to each of the phase/frequency detectors in series and charges or pumps charge amount according to output signals from each of the phase/frequency detectors; a loop filter that controls the amount of supplied current based on output signals from the charge pumps to filter low-pass frequency components; and a voltage controlled oscillator that is oscillated in response to the output signal from the loop filter and generates voltage controlled oscillation frequency signals.

摘要翻译： 本发明涉及一种提高噪声特性的分数N频率合成器及其方法。 分数N频率合成器包括产生参考频率信号的参考振荡器; 基于所述参考频率信号产生所需十进制值的Σ-Δ调制器; 分压器，其分压电压控制的振荡频率信号; 首先检测参考频率信号和分压电压控制振荡频率信号之间的相位和频率差异的M相/频率检测器; 首先对M个串联的每个相位/频率检测器的泵进行充电，并根据来自每个相位/频率检测器的输出信号对电荷或泵充电量; 环路滤波器，其基于来自电荷泵的输出信号来控制供电电流量以滤除低通频率分量; 以及响应于来自环路滤波器的输出信号而振荡并产生压控振荡频率信号的压控振荡器。

公开(公告)号：US20110032011A1

公开(公告)日：2011-02-10

申请号：US12617151

申请日：2009-11-12

申请人： Yoo Hwan KIM ,  Yoo Sam Na ,  Byeong Hak Jo

发明人： Yoo Hwan KIM ,  Yoo Sam Na ,  Byeong Hak Jo

IPC分类号： H03L7/00

CPC分类号： H03L7/1976 ,  H03L7/099

摘要： The present invention relates to and auto frequency calibrator, a method thereof, and a frequency synthesizer using it. The auto frequency calibrator includes a capacitor bank selector that is operated as an open loop and compares a frequency signal having integer-divided reference frequency with the reference frequency signal to select a capacitor bank corresponding to an output frequency; and a capacitor bank controller that is operated as a closed loop when the capacitor bank is selected and compares the output voltage corresponding to the output frequency with a preset voltage range to control the capacitor bank selected in the capacitor bank selector.

摘要翻译： 本发明涉及自动频率校准器及其方法，以及使用它的频率合成器。 自动频率校准器包括作为开环操作的电容器组选择器，将具有整数分频参考频率的频率信号与参考频率信号进行比较，以选择对应于输出频率的电容器组; 以及电容器组控制器，当选择电容器组时作为闭环操作，并将与输出频率相对应的输出电压与预设电压范围进行比较，以控制在电容器组选择器中选择的电容器组。

公开(公告)号：US20100321120A1

公开(公告)日：2010-12-23

申请号：US12563903

申请日：2009-09-21

申请人： Yoo Hwan KIM ,  Yoo Sam Na ,  Byeong Hak Jo

发明人： Yoo Hwan KIM ,  Yoo Sam Na ,  Byeong Hak Jo

IPC分类号： H03L7/08

CPC分类号： H03L7/1976 ,  H03L7/087

摘要： The present relates to a fractional-N frequency synthesizer improving noise characteristics and a method thereof. The fractional-N frequency synthesizer includes a reference oscillator that generates a reference frequency signal; a sigma-delta modulator that generates a desired decimal value based on the reference frequency signal; a divider that divides a voltage controlled oscillation frequency signal; first to M phase/frequency detectors that detect a difference in phase and frequency between the reference frequency signal and the divided voltage controlled oscillation frequency signal; first to M charge pumps that are connected to each of the phase/frequency detectors in series and charges or pumps charge amount according to output signals from each of the phase/frequency detectors; a loop filter that controls the amount of supplied current based on output signals from the charge pumps to filter low-pass frequency components; and a voltage controlled oscillator that is oscillated in response to the output signal from the loop filter and generates voltage controlled oscillation frequency signals.

摘要翻译： 本发明涉及一种提高噪声特性的分数N频率合成器及其方法。 分数N频率合成器包括产生参考频率信号的参考振荡器; 基于所述参考频率信号产生所需十进制值的Σ-Δ调制器; 分压器，其分压电压控制的振荡频率信号; 首先检测参考频率信号和分压电压控制振荡频率信号之间的相位和频率差异的M相/频率检测器; 首先对M个串联的每个相位/频率检测器的泵进行充电，并根据来自每个相位/频率检测器的输出信号对电荷或泵充电量; 环路滤波器，其基于来自电荷泵的输出信号来控制供电电流量以滤除低通频率分量; 以及响应于来自环路滤波器的输出信号而振荡并产生压控振荡频率信号的压控振荡器。

公开(公告)号：US20100134188A1

公开(公告)日：2010-06-03

申请号：US12504127

申请日：2009-07-16

申请人： Byeong Hak JO ,  Yoo Sam Na ,  Yoo Hwan Kim

发明人： Byeong Hak JO ,  Yoo Sam Na ,  Yoo Hwan Kim

IPC分类号： H03F3/16 ,  H03F1/02 ,  H03F1/30 ,  H03F3/68

CPC分类号： H03F1/301 ,  H03F3/3028 ,  H03F2200/18 ,  H03F2200/447

摘要： A buffer amplifier has high input impedance and is less affected by temperature by supplying independent bias power to each of amplification units. The buffer amplifier includes a bias supply unit supplying bias power having a preset voltage level, an amplification unit receiving preset driving power and the bias power from the bias supply unit to amplify an input signal, and a compensation unit compensating for current unbalance of the driving power supplied to the amplification unit.

摘要翻译： 缓冲放大器具有高输入阻抗，并且通过向每个放大单元提供独立的偏置功率而受温度影响较小。 缓冲放大器包括提供具有预设电压电平的偏置功率的偏置电源单元，接收预设驱动功率的放大单元和来自偏置电源单元的偏置功率以放大输入信号;以及补偿单元，用于补偿电流的当前不平衡 提供给放大单元的功率。

公开(公告)号：US08031002B2

公开(公告)日：2011-10-04

申请号：US12504127

申请日：2009-07-16

申请人： Byeong Hak Jo ,  Yoo Sam Na ,  Yoo Hwan Kim

发明人： Byeong Hak Jo ,  Yoo Sam Na ,  Yoo Hwan Kim

IPC分类号： H03F3/26

CPC分类号： H03F1/301 ,  H03F3/3028 ,  H03F2200/18 ,  H03F2200/447

摘要： A buffer amplifier has high input impedance and is less affected by temperature by supplying independent bias power to each of amplification units. The buffer amplifier includes a bias supply unit supplying bias power having a preset voltage level, an amplification unit receiving preset driving power and the bias power from the bias supply unit to amplify an input signal, and a compensation unit compensating for current unbalance of the driving power supplied to the amplification unit.

摘要翻译： 缓冲放大器具有高输入阻抗，并且通过向每个放大单元提供独立的偏置功率而受温度影响较小。 缓冲放大器包括提供具有预设电压电平的偏置功率的偏置电源单元，接收预设驱动功率的放大单元和来自偏置电源单元的偏置功率以放大输入信号;以及补偿单元，用于补偿电流的当前不平衡 提供给放大单元的功率。

公开(公告)号：US20130079065A1

公开(公告)日：2013-03-28

申请号：US13620685

申请日：2012-09-14

申请人： Byeong Hak Jo ,  Hyeon Seok Hwang ,  Yoo Sam Na ,  Yoo Hwan Kim

发明人： Byeong Hak Jo ,  Hyeon Seok Hwang ,  Yoo Sam Na ,  Yoo Hwan Kim

IPC分类号： H04W52/02

CPC分类号： H03F1/56 ,  H03F1/0277 ,  H03F1/223 ,  H03F3/193 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/27 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2203/7206 ,  H03F2203/7215 ,  H03F2203/7236

摘要： There is provided a multi-mode power amplifier having increased isolation, including: a high power mode amplifying unit amplifying an input signal by a pre-set gain when the input signal has a power level higher than a pre-set reference level; a low power mode amplifying unit amplifying the input signal by a pre-set gain when the input signal has a power level lower than the pre-set reference level; a switch unit including one or more switches selectively proving a signal transmission path to the high power mode amplifying unit and the low power mode amplifying unit; and a controller providing a control signal having a pre-set voltage level for switching the one or more switches of the switch unit on or off, the voltage level of the control signal for switching the one or more switches off being set to be a negative voltage.

摘要翻译： 提供了具有增加的隔离度的多模式功率放大器，包括：当输入信号具有高于预设基准电平的功率电平时，高功率模式放大单元将输入信号放大预设增益; 低功率模式放大单元，当所述输入信号具有低于所述预置参考电平的功率电平时，将所述输入信号放大预定增益; 开关单元，其包括选择性地证明到高功率模式放大单元和低功率模式放大单元的信号传输路径的一个或多个开关; 以及控制器，其提供具有用于开关单元的一个或多个开关的开关的预设电压电平的控制信号，用于将一个或多个开关切换的控制信号的电压电平设置为负 电压。

公开(公告)号：US08093947B2

公开(公告)日：2012-01-10

申请号：US12823772

申请日：2010-06-25

申请人： Byeong Hak Jo ,  Yoo Sam Na ,  Min Sun Kim ,  Yoo Hwan Kim

发明人： Byeong Hak Jo ,  Yoo Sam Na ,  Min Sun Kim ,  Yoo Hwan Kim

IPC分类号： H03G3/20

CPC分类号： H03G3/3042

摘要： There is provided a power amplifier with a variable supply of bias power according to a look-up table having a voltage value determined based on a level of an RF signal being input to the power amplifier to thereby increase power efficiency. A power amplifier according to an aspect of the invention may include an amplification section amplifying an input signal according to a bias voltage being supplied; and a bias supply section comparing a level of the input signal with a look-up table set in advance and supplying a bias voltage to the amplification section according to a result of the comparison.

摘要翻译： 根据具有基于输入到功率放大器的RF信号的电平确定的电压值的查找表，提供具有可变偏置电源的功率放大器，从而提高功率效率。 根据本发明的一个方面的功率放大器可以包括放大部分，其根据所提供的偏置电压来放大输入信号; 以及偏置电源部，其将输入信号的电平与预先设定的查找表进行比较，并根据比较结果向放大部提供偏置电压。

公开(公告)号：US08531243B2

公开(公告)日：2013-09-10

申请号：US13370227

申请日：2012-02-09

申请人： Hyun Hwan Yoo ,  Yoo Hwan Kim ,  Yoo Sam Na

发明人： Hyun Hwan Yoo ,  Yoo Hwan Kim ,  Yoo Sam Na

IPC分类号： H03F3/04

CPC分类号： H03F1/301 ,  H03F3/193 ,  H03F3/245 ,  H03F2200/447 ,  H03F2200/555

摘要： The present invention includes: a temperature compensation circuit for generating a digital signal corresponding to a temperature of a transistor and outputting a compensation bias current obtained by adding a control current to a reference bias current or by subtracting the control signal from the reference bias current using the generated digital signal; a characteristics compensation circuit for detecting a characteristics error of a mirror transistor connected to the transistor in parallel and for outputting a compensation signal to compensate the characteristics error; and a bias compensation circuit for compensating a bias power applied to the transistor using the compensation bias current and the compensation signal to output the compensated bias power. The present invention is capable of improving the performance of the transistor.

摘要翻译： 本发明包括：温度补偿电路，用于产生对应于晶体管的温度的数字信号，并输出通过将控制电流加到参考偏置电流而获得的补偿偏置电流，或者通过使用 生成的数字信号; 特性补偿电路，用于并联检测连接到晶体管的反射镜晶体管的特性误差，并输出补偿信号以补偿特性误差; 以及偏置补偿电路，用于使用补偿偏置电流和补偿信号来补偿施加到晶体管的偏置功率，以输出补偿的偏置功率。 本发明能够提高晶体管的性能。