公开(公告)号：KR100475405B1

公开(公告)日：2005-03-10

申请号：KR1020020044841

申请日：2002-07-30

Applicant: 한국과학기술원

Inventor： 이희동 ,  김충환 ,  홍성철

IPC: H03G7/00

Abstract: 본 발명은 가변이득 증폭기에 관한 것으로서, 무선 이동통신 시스템에 적합하게 사용할 수 있도록 외부온도와 전원전압이 변화해도 제어전압에 따른 가변이득 증폭기의 이득이 일정하도록 할 뿐만 아니라 전력이득을 조절하는 제어 전압과 전력이득의 특성곡선이 지수함수적으로 선형적으로 변환되도록 함으로써 넓은 동작영역과 정확한 특성곡선 및 고이득, 작은 잡음 특성, 고효율 및 저전력 특성을 지닐 수 있는 이점이 있다.

公开(公告)号：KR1020040011741A

公开(公告)日：2004-02-11

申请号：KR1020020044841

申请日：2002-07-30

Applicant: 한국과학기술원

Inventor： 이희동 ,  김충환 ,  홍성철

IPC: H03G7/00

Abstract: PURPOSE: A gain controlled amplifier provided with a compensation circuit is provided to maintain the gain of the gain controlled amplifier constant in response to the control voltage although the external temperature and the power voltage are changed. CONSTITUTION: A gain controlled amplifier provided with a compensation circuit includes a voltage to current converter(501), a gain controlled bias circuit(502) and a gain controlled amplifying unit. The voltage to current converter(501) converts the control voltage signal to determine the gain into a control current signal and outputs the converted control current signal as a proportional current compensated for the temperature and the power voltage. The gain controlled bias circuit(502) supplies the bias in such a way that the power gain has a linear characteristics curve as an exponential function in response to the control voltage by receiving the proportional current outputted at the voltage to current converter(501). And, the gain controlled amplifying unit amplifies the bias control voltage generated at the gain controlled bias circuit(502) to have a constant gain by receiving the control voltage.

Abstract translation: 目的：提供补偿电路的增益控制放大器，以保持增益控制放大器的增益，尽管外部温度和电源电压发生变化，但仍然会根据控制电压而恒定。 构成：具有补偿电路的增益控制放大器包括电压 - 电流转换器（501），增益控制偏置电路（502）和增益控制放大单元。 电压 - 电流转换器（501）转换控制电压信号以将增益确定为控制电流信号，并将转换的控制电流信号作为补偿温度和功率电压的比例电流输出。 增益控制偏置电路（502）以这样的方式提供偏置，使得功率增益通过接收在电压 - 电流转换器（501）处输出的比例电流而响应于控制电压具有作为指数函数的线性特性曲线。 并且，增益控制放大单元通过接收控制电压放大在增益受控偏置电路（502）处产生的偏置控制电压以获得恒定的增益。

公开(公告)号：KR100465912B1

公开(公告)日：2005-01-13

申请号：KR1020020044842

申请日：2002-07-30

Applicant: 한국과학기술원

Inventor： 이동호 ,  김충환 ,  홍성철

IPC: H03K3/00

Abstract: PURPOSE: A quadrature-phase difference signal generator is provided to generate an accurate 90 degree phase difference signal by fixing the phase difference of the output signal to 90 degree through real-time compensation. CONSTITUTION: A quadrature-phase difference signal generator includes a quadrature-phase difference signal generation unit(100) and a phase control unit(200). The quadrature-phase difference signal generation unit(100) generates the 90 degree phase difference signal. And, the phase control unit(200) senses the output signal of the quadrature-phase difference signal generation unit(100) and outputs the phase control signal to the orthogonal phase difference signal generation unit(100) so as to correct the sensed output signal by performing a feedback thereof.

Abstract translation: 目的：提供正交相位差信号发生器，通过实时补偿将输出信号的相位差固定为90度，以产生精确的90度相位差信号。 构成：一个正交相位差信号发生器包括一个正交相位差信号发生单元（100）和一个相位控制单元（200）。 正交相位差信号生成单元（100）生成90度相位差信号。 并且，相位控制单元（200）感测正交相位差信号生成单元（100）的输出信号，并将相位控制信号输出到正交相位差信号生成单元（100），以便校正感测的输出信号 通过执行其反馈。

公开(公告)号：KR1020040011742A

公开(公告)日：2004-02-11

申请号：KR1020020044842

申请日：2002-07-30

Applicant: 한국과학기술원

Inventor： 이동호 ,  김충환 ,  홍성철

IPC: H03K3/00

Abstract: PURPOSE: A quadrature-phase difference signal generator is provided to generate an accurate 90 degree phase difference signal by fixing the phase difference of the output signal to 90 degree through real-time compensation. CONSTITUTION: A quadrature-phase difference signal generator includes a quadrature-phase difference signal generation unit(100) and a phase control unit(200). The quadrature-phase difference signal generation unit(100) generates the 90 degree phase difference signal. And, the phase control unit(200) senses the output signal of the quadrature-phase difference signal generation unit(100) and outputs the phase control signal to the orthogonal phase difference signal generation unit(100) so as to correct the sensed output signal by performing a feedback thereof.

Abstract translation: 目的：提供正交相位差信号发生器，通过实时补偿将输出信号的相位差固定为90度，产生精确的90度相位差信号。 构成：正交相位差信号发生器包括正交相位差信号生成单元（100）和相位控制单元（200）。 正交相位差信号生成单元（100）生成90度相位差信号。 并且，相位控制单元（200）感测正交相位差信号生成单元（100）的输出信号，并将相位控制信号输出到正交相位差信号生成单元（100），以校正感测到的输出信号 通过执行其反馈。