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公开(公告)号：KR1019960003566B1
公开(公告)日：1996-03-15
申请号：KR1019930021539
申请日：1993-10-16
Applicant: 한국전자통신연구원
IPC: H03G11/00
Abstract: a filter body in which a space having predetermined size and depth is formed to open the upper side thereof; a plurality of inductive conductor assembling bars installed by a predetermined interval with the space of the filter body, for defining a resonant frequency and a magnetic coupling; a plurality of capacitive members each installed on the upper side of the inductive conductor assembling bars, for adjusting the resonant frequency and the magnetic coupling; input/output connectors each provided on the both sides of the body and each connected to the inductive conductor assembling bars in the input and output sides; a filter cover in which a predetermined size of space is formed to open the lower side thereof; a plurality of trimming bars fixed to pass through the upper surface of the filter cover, and for adjusting an amount of the electric coupling; and a plurality of trimming disks installed by a predetermined interval to be arranged alternatively with the trimming bars and fixed to pass through the upper surface of the filter cover, for fine adjusting a space frequency.
Abstract translation: 过滤器体，其中形成具有预定尺寸和深度的空间以打开其上侧; 多个感应导体组装棒，其与过滤器主体的空间预定间隔安装，用于限定谐振频率和磁耦合; 多个电容部件，分别安装在感应导体组装棒的上侧，用于调节谐振频率和磁耦合; 输入/输出连接器各自设置在主体的两侧，每个连接到输入和输出侧的感应导体组装棒; 过滤器盖，其中形成预定尺寸的空间以打开其下侧; 多个修整杆被固定以穿过过滤器盖的上表面，并用于调节电耦合的量; 以及多个修整盘，其以预定的间隔安装，以与修整杆交替布置并固定以通过过滤器盖的上表面，用于微调空间频率。
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公开(公告)号：KR1019950013612B1
公开(公告)日：1995-11-13
申请号：KR1019920026104
申请日：1992-12-29
Applicant: 한국전자통신연구원
IPC: H04B1/06
Abstract: The center frequency of a channel filter is varied according to Doppler frequency variation to minimize the distortion occurred in roll-off region. The receiver includes a first mixer(202) for generating intermediate signal by mixing output signals of a duplex filter and an oscillator, a channel filter(204) for adjusting center frequency, a lowpass filter(205) for filtering output signal of the channel filter(204), a bit timer(208) for sampling output signal of the lowpass filter, and center frequency adjuster(206) for providing center frequency adjusting voltage to the channel filter(204).
Abstract translation: 通道滤波器的中心频率根据多普勒频率变化而变化，以最小化滚降区域发生的失真。 接收机包括用于通过混合双工滤波器和振荡器的输出信号来产生中间信号的第一混频器（202），用于调整中心频率的信道滤波器（204），用于滤波信道滤波器的输出信号的低通滤波器 （204），用于对低通滤波器的输出信号进行采样的位定时器（208）和用于向信道滤波器（204）提供中心频率调整电压的中心频率调节器（206）。
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Patent Agency Ranking
公开(公告)号：KR100513175B1
公开(公告)日：2005-09-07
申请号：KR1020020083728
申请日：2002-12-24
Applicant: 한국전자통신연구원
IPC: G10L15/14
CPC classification number: G10L25/78
Abstract: 본 발명은 복소수 라플라시안 통계 모델을 이용한 음성 검출기에 관한 것이다. 본 발명의 음성검출기는 입력된 음성에 대하여 고속 푸리에 변환을 수행하여 시간 영역의 음성신호를 주파수 영역에서 분석할 수 있도록 하는 고속 주파수 푸리에 변환기, 상기 고속 주파수 푸리에 변환기로부터 출력되는 주파수 영역 상의 잡음에 오염된 음성으로부터 잡음 신호의 파워를 추정하는 잡음 파워 추정부, 상기 추정된 잡음 신호의 파워에 기초하여 음성의 존재와 비존재에 대한 복소 라플라시안 확률 통계 모델로부터 주파수 영역에 대해 가능성 비율을 결정하고, 상기 결정된 가능성 비율로부터 VAD(Voice activity detection)의 결정 규칙을 계산하는 가능성 비율 테스트(LRT) 계산부를 포함한다.
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公开(公告)号：KR100421417B1
公开(公告)日：2004-03-09
申请号：KR1020010065150
申请日：2001-10-22
IPC: H03F1/42
Abstract: PURPOSE: A broadband high gain amplification circuit is provided to maintain a high gain and a bandwidth even though an input frequency is increased. CONSTITUTION: An amplification part(100) amplifies an input signal. An impedance control part(200) constitutes a current mirror by receiving a constant voltage(Vb1), and improves a gain of the amplification part by increasing an output impedance of the amplification part at a half power frequency where the gain of the amplification becomes a half of its peak value. The impedance control part includes an inductor(210) connected to a power supply, and a PMOS(220) having a gate connected to the constant voltage and being connected to the inductor, and a resistor(230) connected between one side of the PMOS and another side of the inductor and connected to another side of the PMOS.
Abstract translation: 目的：提供宽带高增益放大电路以保持高增益和带宽，即使输入频率增加。 构成：放大部分（100）放大输入信号。 通过接收恒定电压（Vb1），阻抗控制部（200）构成电流反射镜，并且通过在放大部的增益变为α的半功率频率处增大放大部的输出阻抗来提高放大部的增益 其峰值的一半。 阻抗控制部分包括连接到电源的电感器（210）和具有连接到恒定电压的栅极并连接到电感器的PMOS（220），以及连接在PMOS的一侧之间的电阻器（230） 并且电感器的另一侧连接到PMOS的另一侧。
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公开(公告)号：KR100413182B1
公开(公告)日：2003-12-31
申请号：KR1020010075186
申请日：2001-11-30
Applicant: 한국전자통신연구원
IPC: H03F3/45
CPC classification number: H03G1/007 , H03F3/45179 , H03F2203/45492 , H03G1/0023
Abstract: An automatically gain controllable linear differential amplifier using a variable degeneration resistor is disclosed. The linear differential amplifier includes an input end, a bias current source, a load unit, a first MOS transistor and a second MOS transistor. The linear differential amplifiers of the present invention can control an amplifying gain according to an input signal and improve linearity IIP3 without needing additional power consumption caused by improving the linearity The automatically gain controllable linear differential amplifier uses NMOS/PMOS transistor so an integration process of the amplifier can be implemented more conveniently and efficiently.
Abstract translation: 公开了一种使用可变负反馈电阻的自动增益可控的线性差分放大器。 线性差分放大器包括输入端，偏置电流源，负载单元，第一MOS晶体管和第二MOS晶体管。 本发明的线性差分放大器可以根据输入信号控制放大增益并且改善线性度IIP3，而不需要由增加线性度引起的额外功耗。自动增益可控的线性差分放大器使用NMOS / PMOS晶体管， 放大器可以更加方便和高效地实现。
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公开(公告)号：KR1020030044444A
公开(公告)日：2003-06-09
申请号：KR1020010075186
申请日：2001-11-30
Applicant: 한국전자통신연구원
IPC: H03F3/45
CPC classification number: H03G1/007 , H03F3/45179 , H03F2203/45492 , H03G1/0023
Abstract: PURPOSE: A differential linear amplifier is provided to improve the linearity(IIP3) viewed from the input side by controlling the gain of the amplification in response to the input signal applied to the differential amplifier as well as improve the IIP3 by utilizing a poly silicon without using the polysilicon as a resistor, thereby obtaining an excellent characteristics. CONSTITUTION: A differential linear amplifier includes an input block for receiving a positive input signal and a negative input signal, a bias current source provided on one side of the input block for supplying a bias current, a pair of load blocks(110,120) provided on the other side of the input block for supplying the different level between the output signals between the positive output terminal and the negative output terminal corresponding to the positive input signal and the negative input signal, a first MOD transistor(210) connected between the bias current source and the input block for utilizing the positive input signal as a gate input and the gain control signal as a substrate bias voltage and a second MOS transistor(220) connected between the bias current source and the input block for utilizing the negative input signal as a gate input and the gain control signal as a substrate bias voltage.
Abstract translation: 目的：提供差分线性放大器，以通过控制放大器的输入信号来响应于差分放大器的输入信号来控制从输入侧观察的线性度（IIP3），并通过利用多晶硅来改善IIP3，而不需要 使用多晶硅作为电阻器，从而获得优异的特性。 构成：差分线性放大器包括用于接收正输入信号和负输入信号的输入块，设置在用于提供偏置电流的输入块的一侧上的偏置电流源，设置在该输入块上的一对加载块（110,120） 用于在与正输入信号和负输入信号相对应的正输出端和负输出端之间的输出信号之间提供不同电平的输入块的另一侧;连接在偏置电流之间的第一MOD晶体管（210） 源极和用于利用正输入信号作为栅极输入和增益控制信号作为衬底偏置电压的输入块和连接在偏置电流源和输入块之间的第二MOS晶体管（220），以将负输入信号用作 栅极输入和增益控制信号作为衬底偏置电压。
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公开(公告)号：KR1019950013065A
公开(公告)日：1995-05-17
申请号：KR1019930021539
申请日：1993-10-16
Applicant: 한국전자통신연구원
IPC: H03G11/00
Abstract: 본 발명은 이동통신 시스템의 수신필터 전치단 송수신 대역통과 여파기에 관한 것으로, 소정의 크기 및 깊이를 갖는 공간이 형성되어 있는 여파기 몸체(10); 공진주파수와 마그네틱 커플링을 정하는 다수의 인덕티브 도체결합봉(12); 공진주파수와 일랙트릭 커플링을 조절하기 위한 다수의 캐패시티브 시편(11); 입력용 및 커넥터(14); 여파기 뚜껑(20); 상기 여파기 뚜껑(20)에 고정되고, 외부에서 용이하게 조절할 수 있도록 되어 있으며, 일랙트릭 커플링의 양을 조절하기 위한 다수의 조절막대(22); 및 상기 여파기 뚜껑내의 공간에서 상기 다수의 조절막대(22)와 교번적으로 배열되게 일정간격으로 설치되며 조절나사(23)의 내측 끝단에 부착되어 공진주파수의 미세조정을 가능하게 하는 다수의 조절판(21)을 포함하여, 마그네틱 커플링(혹은, 일랙트릭 커플링)을 원하는 결합계수 보다 훨씬 크게 한 후, 일랙트릭 커플링(혹은, 마그네틱 커플링)을 이용하여 원하는 결합계수로 맞추어 원하는 저지대역의 감쇠특성을 얻도록 하는 효과를 갖는다.
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