公开(公告)号：KR1020110014285A

公开(公告)日：2011-02-11

申请号：KR1020090071841

申请日：2009-08-05

Applicant: 전자부품연구원

Inventor： 김기진 ,  안광호

IPC: H03F3/60 ,  H03F1/02

CPC classification number: H03F3/602 ,  H03F1/22 ,  H03F2200/06 ,  H03F2200/537 ,  H03H7/42

Abstract: PURPOSE: A multi-finger type transformer and a power amplifier using the same are provided to reduce area required for a voltage coupling process using an inductor-based transformer. CONSTITUTION: A first loop(110) generates magnetic field by receiving power form a power supplying part. A part of the first loop is open. One end of a pair of input lines(130) is expanded through the opened part of the first loop. Another end of the input lines is in connection with the power supplying part in order to supply power to the first loop. A second loop(120) is shaped into the same shape of the first loop. The second loop is formed at the outside of the first loop in order to generate an inducing current. A part of the second loop is open. One end of a pair of output lines(140) is expanded though the opened part of the second loop. Another end of the output line is in connection with an output terminal.

Abstract translation: 目的：提供多指型变压器和使用它的功率放大器，以减少使用基于电感器的变压器进行电压耦合过程所需的面积。 构成：第一回路（110）通过从供电部分接收电力来产生磁场。 第一个循环的一部分是打开的。 一对输入线（130）的一端通过第一回路的打开部分扩展。 为了向第一回路供电，输入线的另一端与电源部分连接。 第二回路（120）被成形为与第一回路相同的形状。 第二回路形成在第一回路的外部，以产生感应电流。 第二个循环的一部分是打开的。 一对输出线（140）的一端通过第二回路的打开部分而膨胀。 输出线的另一端与输出端相连。

公开(公告)号：KR100956758B1

公开(公告)日：2010-05-12

申请号：KR1020070137252

申请日：2007-12-26

Applicant: 전자부품연구원

Inventor： 김기진 ,  안광호 ,  김영웅

IPC: H03L7/00

Abstract: 본 발명은 발진기의 발진신호의 주파수를 빠른 시간 내에 고정(locking)시킬 수 있는 자동 주파수 조절장치에 관한 것으로서 발진기의 발진신호를 분주기가 1/N으로 분주하고, 기준신호 발생기가 발생한 기준신호의 위상을 위상 정렬기가 정렬하여 복수의 기준신호를 생성하고, 생성한 복수의 기준신호들 중에서 분주기의 출력신호에 따라 하나의 기준신호를 선택하며, 그 선택한 기준신호와 분주기가 출력하는 발진신호의 주파수를 주파수 비교기가 비교하며, 주파수 비교기의 비교 결과에 따라 주파수 제어기가 주파수 가변부를 제어하여 발진기의 발진 주파수를 기준주파수에 고정시킨다.
발진기, 발진주파수, 위상정렬, 주파수 비교, 기준신호, 발진신호

公开(公告)号：KR1020100005836A

公开(公告)日：2010-01-18

申请号：KR1020080065897

申请日：2008-07-08

Applicant: 전자부품연구원

Inventor： 김기진 ,  안광호

IPC: H04B1/16

CPC classification number: H04B1/16 ,  H04B1/10

Abstract: PURPOSE: A broadband radio frequency signal down conversion device in a broadband wireless communications system is provided to secure low power and high linearity and convert broadband RF signal into difference signal simply. CONSTITUTION: A common source mode varistor(171) controls impedance according to differential RF(Radio Frequency) signal inputted from a differential input generator. A frequency conversion unit(173) is connected between a variable resistance unit and virtual high potential and down-converts the RF signal according to differential local signal. The load is installed between the virtual high potential and high potential. The current signal is changed into voltage.

Abstract translation: 目的：提供宽带无线通信系统中的宽带射频信号下变频设备，以确保低功耗和高线性度，并将宽带射频信号简单地转换为差分信号。 构成：根据差分输入发生器输入的差分RF（射频）信号，常用的源极型压敏电阻（171）控制阻抗。 变频单元（173）连接在可变电阻单元和虚拟高电位之间，并根据差分本地信号对RF信号进行下变频。 负载安装在虚拟高电位和高电位之间。 电流信号变为电压。

公开(公告)号：KR1020080105793A

公开(公告)日：2008-12-04

申请号：KR1020070053836

申请日：2007-06-01

Applicant: 전자부품연구원

Inventor： 김기진 ,  안광호

IPC: H03K5/22

CPC classification number: H03K5/249 ,  H03F1/303 ,  H03F3/005

Abstract: A comparator is provided to compare the magnitude voltage of two signals with minute voltage difference by correcting a gain error of an operational amplifier. A comparator includes first and second switches(SW1, SW2), a first operational amplifier(100), third and fourth switches(SW3, SW4), a second operational amplifier(110), and a capacitor(C1,C2). The first and second switches selectively input the ground signal or the comparison signal. The first operational amplifier calculates and amplifies the signal of the first and second switches. The third and fourth switches are connected to the ground. The second operational amplifier amplifies the signal of the third and fourth switches. The capacitor stores the output signal of the first and second operational amplifiers in case the first to fourth switches are connected to the ground. The first and second switches select the comparison signal. The capacitor positively feeds backs the output signal of the first and second operational amplifiers to the second operational amplifier when the third and fourth switches are opened. A voltage level regulator is positioned between the first and second switches and the first operational amplifier. The voltage level regulator compares the source voltage which is the input transistor of the first operational amplifier with the previously set reference voltage. According to the comparison result, the voltage level regulator regulates the voltage level of the signal inputted through the first and second switches.

Abstract translation: 提供比较器，通过校正运算放大器的增益误差来比较具有微小电压差的两个信号的幅度电压。 比较器包括第一和第二开关（SW1，SW2），第一运算放大器（100），第三和第四开关（SW3，SW4），第二运算放大器（110）和电容器（C1，C2）。 第一和第二开关选择性地输入接地信号或比较信号。 第一运算放大器计算并放大第一和第二开关的信号。 第三和第四开关连接到地。 第二运算放大器放大第三和第四开关的信号。 在第一至第四开关连接到地面的情况下，电容器存储第一和第二运算放大器的输出信号。 第一和第二开关选择比较信号。 当第三和第四开关断开时，电容器将第一和第二运算放大器的输出信号正反馈到第二运算放大器。 电压电平调节器位于第一和第二开关和第一运算放大器之间。 电压电平调节器将第一运算放大器的输入晶体管的源电压与先前设置的参考电压进行比较。 根据比较结果，电压电平调节器调节通过第一和第二开关输入的信号的电压电平。