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公开(公告)号：KR100501901B1
公开(公告)日：2005-07-25
申请号：KR1020020083234
申请日：2002-12-24
Applicant: 한국전자통신연구원
IPC: H03G3/00
Abstract: 본 발명의 가변 이득 증폭기는, 이득 특성은 지수함수 특성을 갖고, 증폭기의 이득이 입력 제어 전압에 따라 연속적으로 가변하는 특성을 갖도록 하며, 회로의 단순화를 통한 저면적화와, 회로의 구조적 개선을 통한 고 선형성 및 저잡음화의 특성을 얻을 수 있는 가변 이득 증폭기를 제공하는데 그 목적이 있다.
상기 목적을 달성하기 위하여 본 발명은, 외부 제어 전압을 인가받고, 상기 외부 제어 전압을 변환한 후, 복수개의 단계로 분배하며, 분배된 복수개의 단계 전압을 복수개의 내부 제어 신호로서 출력하는 제어 신호 발생부; 상기 복수개의 내부 제어 신호를 입력받고, 상기 복수개의 내부 제어 신호에 따라 가변적인 저항값을 제공하는 가변저항부; 및 W/L이 서로 다른 병렬 쌍 결합 차동 증폭기를 내부에 구비하고, 상기 가변저항부가 제공하는 저항값에 따라 비반전 신호 및 반전 신호의 차동 성분을 증폭하는 차동 증폭부를 포함한다.-
公开(公告)号：KR1020160096795A
公开(公告)日：2016-08-17
申请号：KR1020150018208
申请日：2015-02-05
Applicant: 한국전자통신연구원
CPC classification number: H03F1/42 , H03F1/0277 , H03F1/56 , H03F3/193 , H03F3/245 , H03F3/45188 , H03F3/72 , H03F2200/111 , H03F2200/451 , H03F2200/555 , H03F2203/45056 , H03F2203/7209 , H03F1/301 , H03F3/211 , H03F3/601
Abstract: 본발명은무선통신단말기및 시스템내에장착되는전력증폭장치에관한것이다. 본발명의일 측면에따르면, 광대역주파수선택이가능한재구성전력증폭장치가제공된다. 재구성전력증폭장치는 RF 신호를입력받는입력트랜지스터및 분할된복수의공통게이트로형성되며상기 RF 신호를증폭하는복수의공통게이트트랜지스터에공통게이트바이어스전압을인가하여광대역주파수를선택하는재구성적응전력셀을포함할수 있다.
Abstract translation: 本发明涉及一种安装在系统中的无线通信终端和功率放大装置。 根据本发明的实施例，提供了能够选择宽带频率的可重新配置的功率放大装置。 可重构功率放大装置包括：输入晶体管，被配置为接收RF信号; 以及由多个分开的公共栅极组成的可配置自适应功率单元，并且被配置为向放大所述RF信号以选择宽带频率的多个公共栅极晶体管施加公共栅极偏置电压。
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公开(公告)号：KR1020160027302A
公开(公告)日：2016-03-10
申请号：KR1020140113118
申请日：2014-08-28
Applicant: 한국전자통신연구원
IPC: H04L25/03
CPC classification number: H04B1/0475 , H03F1/3223 , H03F3/24 , H04B1/0028 , H04B2001/0416 , H04B2001/0441 , H04W52/346 , H04W52/52
Abstract: 본발명의실시예들은, 반송파집성과포락선추적을지원하는 RF 송신기에관한것으로, 본발명의일 실시예에따른 RF 송신기는, 기저대역에해당하는다수의요소신호(Component Carrier; CC)들이집성된반송파집성신호를 RF(Radio Frequency) 신호로변환하는 RF 경로; 상기다수의요소신호들각각의크기(magnitude)를계산하고, 상기계산된각각의요소신호들의크기를더하여포락선(envelope) 신호를생성하는 ET 경로; 및상기변환된 RF 신호를상기생성된포락선신호에대응하는바이어스전압에따라전력증폭하는증폭기를포함한다. 본발명의실시예들에따르면, 반송파집성기술과포락선추적기술을적용하여, 전력증폭효율과데이터전송효율을향상시킬수 있다.
Abstract translation: 本发明的实施例涉及支持载波聚合和包络跟踪的RF发射机。 根据本发明的实施例的RF发射机包括：用于将其中已经聚合了与基带相对应的多个分量载波（CC）的载波聚合信号转换成射频（RF）信号的RF路径; ET路径，用于通过计算多个分量载波中的每一个的幅度并相加每个分量载波的所计算的大小来产生包络信号; 以及放大器，用于根据对应于所生成的包络信号的偏置电压来放大所转换的RF信号的功率。 根据本发明的实施例，可以通过应用载波聚合技术和包络跟踪技术来提高功率放大效率和数据传输效率。
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公开(公告)号：KR1020130029327A
公开(公告)日：2013-03-22
申请号：KR1020120052200
申请日：2012-05-16
Applicant: 한국전자통신연구원
Abstract: PURPOSE: A single frequency synthesizer based FDD(Frequency Division Duplex) transceiver is provided to execute frequency upper and lower conversion by using a single frequency synthesizer. CONSTITUTION: A duplexer(630) transmits a signal of an RF(Radio Frequency) band through an antenna. A receiver(650) amplifies the received RF band signal from the antenna through the duplexer. The receiver executes the lower frequency conversion of the amplified signal. The receiver processes the analog signal processing of the lower frequency converted signal. A frequency synthesizer(660) generates a carrier frequency for executing the frequency lower conversion in the receiver by executing an upper frequency conversion in a transmitter. [Reference numerals] (610) Transmission signal processing unit; (611) Digital filter; (612) IF up-conversion unit; (613) IF generating and processing unit; (622) Analog front-end unit; (623) RF up-conversion unit; (624) Bandpass filter; (630) Duplexer; (650) Receiver; (660) Frequency synthesizer; (AA) Digital baseband 1; (BB) Digital baseband Q; (CC) Transmission frequency information; (DD) Reception frequency information
Abstract translation: 目的：提供基于单频合成器的FDD（频分双工）收发器，通过使用单个频率合成器来执行频率上下转换。 构成：双工器（630）通过天线发送RF（射频）频带的信号。 接收机（650）通过双工器放大从天线接收的RF频带信号。 接收机执行放大信号的较低频率转换。 接收器处理较低频率转换信号的模拟信号处理。 频率合成器（660）通过在发射机中执行较高的频率转换来产生用于在接收机中执行频率较低转换的载波频率。 （附图标记）（610）发送信号处理单元; （611）数字滤波器; （612）IF上变频单元; （613）IF生成处理单元; （622）模拟前端单元; （623）RF上变频单元; （624）带通滤波器; （630）双工器; （650）接收器; （660）频率合成器; （AA）数字基带1; （BB）数字基带Q; （CC）传输频率信息; （DD）接收频率信息
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公开(公告)号：KR100727814B1
公开(公告)日：2007-06-13
申请号：KR1020060098890
申请日：2006-10-11
Applicant: 한국전자통신연구원
Abstract: An automatic gain controller and a wireless receiver having the same are provided to be advantageous in consuming power because a block like RSSI(Received Signal Strength Indicator) is not necessary in order to detect power of an RF signals. An automatic gain controller comprises an analog gain controller(300) and a digital gain controller(200). The analog gain controller generates gain control voltage for performing an analog feedback control of an amplification value with a minute range for an external amplifying unit. The digital gain controller receives the gain control voltage and determines an amplification value with a rough range for the external amplifying unit. The digital gain controller includes an acyclic up/down counter(206) and power comparers(202,203). The acyclic up/down counter(206) generates a digital code. The power comparers(202,203) compares the gain control voltage with reference voltage, and determines a polarity of the acyclic up/down counter.
Abstract translation: 自动增益控制器和具有该自动增益控制器的无线接收器被提供为在消耗功率方面是有利的，因为像RSSI（接收信号强度指示符）这样的块不是必需的，以便检测RF信号的功率。 自动增益控制器包括模拟增益控制器（300）和数字增益控制器（200）。 模拟增益控制器产生增益控制电压，用于对外部放大单元执行具有微小范围的放大值的模拟反馈控制。 数字增益控制器接收增益控制电压并为外部放大单元确定具有粗略范围的放大值。 数字增益控制器包括非循环加/减计数器（206）和功率比较器（202,203）。 非循环递增/递减计数器（206）生成数字码。 功率比较器（202,203）将增益控制电压与参考电压进行比较，并确定非周期增/减计数器的极性。
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Patent Agency Ranking
公开(公告)号：KR1020040055085A
公开(公告)日：2004-06-26
申请号：KR1020020081680
申请日：2002-12-20
Applicant: 한국전자통신연구원
IPC: H03L7/097
Abstract: PURPOSE: A frequency synthesizer for multi-band and a method for synthesizing a frequency are provided to process the multi-band under the low power by using a VCO(Voltage Controlled Oscillator). CONSTITUTION: A frequency/phase detector(200) compares a reference frequency with a feedback frequency and outputs a compared result. A charge pump circuit(300) converts the compared result to the current. A low pass filter(400) generates a voltage corresponding to the output current of the charge pump circuit. A VCO(500) outputs a voltage controlled frequency corresponding to an output voltage of the low pass filter. A division circuit(600) divides the voltage controlled frequency of the VCO by a band selection ratio and outputs a desired band frequency. A channel selection division circuit(700) divides the band frequency by a channel selection ratio and generates the feedback frequency.
Abstract translation: 目的：提供用于多频带的频率合成器和用于合成频率的方法，以通过使用VCO（压控振荡器）在低功率下处理多频带。 构成：频率/相位检测器（200）将参考频率与反馈频率进行比较，并输出比较结果。 电荷泵电路（300）将比较结果转换成电流。 低通滤波器（400）产生对应于电荷泵电路的输出电流的电压。 VCO（500）输出对应于低通滤波器的输出电压的电压控制频率。 分频电路（600）将VCO的压控频率除以频带选择比，并输出期望的频带频率。 频道选择分频电路（700）将频带频率除以频道选择比，并产生反馈频率。
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公开(公告)号：KR1020040055084A
公开(公告)日：2004-06-26
申请号：KR1020020081679
申请日：2002-12-20
Applicant: 한국전자통신연구원
IPC: H03L7/08
Abstract: PURPOSE: A frequency synthesizer for detecting current of a charge pump circuit is provided to minimize a delay time of a delay signal for resetting a frequency/phase detector by predicting accurately the variation according to various conditions. CONSTITUTION: A frequency synthesizer for detecting current of a charge pump circuit includes a frequency/phase detector, a charge pump circuit, and a current detector. The frequency/phase detector(100) is used for receiving the first frequency and outputting the first and the second control signals corresponding the first frequency. The charge pump circuit(200) is used for outputting the first current and the second current in response to the first and the second control signals. The current detector(300) is used for detecting a period when the first current and second current flow simultaneously, and outputting a delay signal for resetting the frequency/phase detector.
Abstract translation: 目的：提供一种用于检测电荷泵电路电流的频率合成器，用于通过根据各种条件准确地预测变化来最小化用于复位频率/相位检测器的延迟信号的延迟时间。 构成：用于检测电荷泵电路的电流的频率合成器包括频率/相位检测器，电荷泵电路和电流检测器。 频率/相位检测器（100）用于接收第一频率并输出对应于第一频率的第一和第二控制信号。 电荷泵电路（200）用于响应于第一和第二控制信号输出第一电流和第二电流。 电流检测器（300）用于同时检测第一电流和第二电流的周期，并且输出用于复位频率/相位检测器的延迟信号。
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公开(公告)号：KR1020030047565A
公开(公告)日：2003-06-18
申请号：KR1020010078268
申请日：2001-12-11
Applicant: 한국전자통신연구원
IPC: H03L7/00
CPC classification number: H03M7/3022 , H03L7/1978
Abstract: PURPOSE: A structure of a delta sigma divider is provided to obtain the capacity to synthesize the broadband frequency and maximize an effect of a delta sigma method by adding an output value of a delta sigma modulator to an external input value to modulate a value of a swallow counter. CONSTITUTION: A delta sigma modulator(41) is used for receiving a frequency and an external input value. A swallow adder block(40) is used for adding an external input value to an output value of the delta sigma modulator. A program register block(37) is used for storing an output value of the swallow adder block. A pulse swallow counter block(34) is formed with a dual modulus prescaler, a program counter, and a swallow counter in order to divide an input frequency according to a stored value of the program register block.
Abstract translation: 目的：提供Δ-Σ分配器的结构，以获得合成宽带频率的能力，并通过将Δ-Σ调制器的输出值与外部输入值相加来调整Δ值 吞咽计数器 构成：ΔΣ调制器（41）用于接收频率和外部输入值。 吞咽加法器块（40）用于将外部输入值添加到delta-Σ调制器的输出值。 程序寄存器块（37）用于存储吞咽加法器块的输出值。 脉冲吞咽计数器块（34）由双模预分频器，程序计数器和吞咽计数器形成，以便根据程序寄存器块的存储值对输入频率进行分频。
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公开(公告)号：KR1020170103600A
公开(公告)日：2017-09-13
申请号：KR1020160096630
申请日：2016-07-29
Applicant: 한국전자통신연구원
Abstract: 본발명은 RF 송수신기의 IQ 불일치및 DC 옵셋을보정하기위한방법및 장치에관한것이다. 본발명에따른 RF 송수신기의디씨옵셋(DC offset) 및 I-Q 불일치성분을보정하기위한방법은, 송신기에테스트신호에입력하고, 상기테스트신호를아날로그화하는단계, 송신믹서를이용하여상기아날로그화된 테스트신호를변환하는단계, 상기송신믹서로부터출력된신호를서브샘플링(subsampling)하여디지털화하는단계및 상기서브샘플링된신호로부터디씨옵셋및 I-Q 불일치보정상수를산출하는단계를포함할수 있다.
Abstract translation: 本发明涉及一种校正RF收发器的IQ失配和DC偏移的方法和设备。 根据本发明的用于校正RF收发机的DC偏移和IQ失配分量的方法包括：向发射机输入测试信号并且模拟测试信号; 转换测试信号，通过二次采样数字化发射混频器输出的信号，并根据子采样信号计算DC偏移和IQ失配校正常数。
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公开(公告)号：KR101377588B1
公开(公告)日：2014-03-25
申请号：KR1020100081571
申请日：2010-08-23
Applicant: 한국전자통신연구원
Abstract: 디지털입력신호를 RF 신호로변환하는디지털 RF 변환기에서, 차동스위치가발진신호에응답하여서제1 및제2 노드를제1 및제2 RF 출력단자에선택적으로연결한다. 적어도하나의디지털지연소자열이디지털입력신호에해당하는입력비트를차례로지연하여서복수의단위비트를출력하고, 전치프로세서가디지털지연소자열의출력을합산한다. 복수의전류원에각각대응하는복수의스위치가복수의전류원중 전치프로세서의합산값에대응하는개수의전류원의전류를제1 및제2 노드중 어느하나로전달한다.
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