公开(公告)号：US20050079849A1

公开(公告)日：2005-04-14

申请号：US10791850

申请日：2004-03-04

申请人： Yoo Na ,  Won Baek ,  Ki Choi ,  Seung Seo ,  Seung Oh

发明人： Yoo Na ,  Won Baek ,  Ki Choi ,  Seung Seo ,  Seung Oh

IPC分类号： H03D7/00 ,  H03L7/18 ,  H04B1/16 ,  H04B1/26 ,  H04B1/28 ,  H04B1/30 ,  H03L7/00 ,  H04B15/00

CPC分类号： H04B1/005 ,  H04B1/28 ,  H04B1/30

摘要： Disclosed herein is a receiver for down-conversion of a dual band. The receiver can down convert radio frequency signals of two different bands into a desired IF signal using only one voltage controlled oscillator (VCO), by dividing the output of the VCO into a predetermined ratio with a divider. The VCO outputs a desired oscillating frequency for conversion of the first-band RF signal into the IF signal, and the divider divides the desired oscillating frequency in a predetermined ratio to output a frequency for conversion of the second-band RF signal into the IF signal. Thus, the receiver can be formed on one silicon substrate.

摘要翻译： 本文公开了一种用于双频带的下转换的接收机。 接收机可以通过仅使用一个压控振荡器（VCO）将两个不同频带的射频信号下变频成所需的IF信号，通过用分频器将VCO的输出除以预定的比例。 VCO输出期望的振荡频率，用于将第一频带RF信号转换成IF信号，并且分频器以预定比例分割期望的振荡频率，以输出用于将第二频带RF信号转换成IF信号的频率 。 因此，接收器可以形成在一个硅衬底上。

公开(公告)号：US20060290417A1

公开(公告)日：2006-12-28

申请号：US11420728

申请日：2006-05-26

申请人： Jeong Choi ,  Won Baek ,  Hyun Yoo ,  Seung Oh

发明人： Jeong Choi ,  Won Baek ,  Hyun Yoo ,  Seung Oh

IPC分类号： G05F1/10

CPC分类号： H03G7/001

摘要： The present invention relates to an exponential function generator which is realized with only CMOS element without BJT element, not limited by the physical properties of the element or a square circuit, and not complicated in its configuration, and a variable gain amplifier using the same. The exponential function generator includes a voltage-current converter, 1st to nth curve generators for mirroring the current from the voltage-current converter, outputting a current adjusted according to a predetermined ratio, and an output end for outputting the sum of the current from the 1st to nth curve generators. The exponential current generator is configured to generate the current exponentially adjusted according to the control voltage.

摘要翻译： 本发明涉及一种仅使用没有BJT元件的CMOS元件实现的指数函数发生器，不受元件或平方电路的物理特性限制，并且其结构不复杂，以及使用其的可变增益放大器。 指数函数发生器包括用于镜像来自电压 - 电流转换器的电流的电压 - 电流转换器，1 至第n个/曲线发生器，输出根据 以及输出端，用于输出从第1至第n曲线发生器的电流之和。 指数电流发生器被配置为根据控制电压产生指数调节的电流。

公开(公告)号：US20060197599A1

公开(公告)日：2006-09-07

申请号：US11292208

申请日：2005-12-02

申请人： Moon Kim ,  Won Baek

发明人： Moon Kim ,  Won Baek

IPC分类号： H03G3/30

CPC分类号： H03F1/223 ,  H03F1/3205 ,  H03F1/342 ,  H03F3/193 ,  H03F3/345 ,  H03F2200/117 ,  H03F2200/141 ,  H03F2200/372 ,  H03G1/007 ,  H03G1/0088

摘要： The invention relates to a feedback or feedforward type variable gain wideband amplifier. The variable gain wideband amplifier includes a feedback-type inversion amplifier circuit 310 for amplifying input Vin, a feedback-type non-inversion amplifier circuit 320 for amplifying input Vin, a power source circuit 330 for controlling the gain of the non-inversion amplifier circuit 320 and a load circuit 340 connected between a junction of output terminals of the inversion and non-inversion amplifier circuits 310 and 320 and power voltage potential VDD to control the gain of the amplifier circuits 310 and 320. The variable gain wideband amplifier of the invention is feedforward type, and outputs signals from the inversion and non-inversion amplifier circuits 310 and 320 via a single output terminal in order to attenuate third order intermodulation frequency IM3 generated from the amplifier circuits 310 and 320. Then, predetermined frequencies f1 and f2 included in the input signal are amplified.

摘要翻译： 本发明涉及一种反馈或前馈型可变增益宽带放大器。 可变增益宽带放大器包括用于放大输入Vin的反馈型反相放大器电路310，用于放大输入Vin的反馈型非反相放大器电路320，用于控制非反相放大器电路的增益的电源电路330 320和连接在反相放大器电路310和非反相放大器电路310的输出端的接点和电源电压电位VDD之间的负载电路340，以控制放大器电路310和320的增益。 本发明的可变增益宽带放大器是前馈型，并且经由单个输出端子从反相和非反相放大器电路310和320输出信号，以衰减从放大器电路310和320产生的三阶互调频率IM 3 。 然后，包括在输入信号中的预定频率f 1和f 2被放大。