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    • 5. 发明公开
    • 증강된 선형 레인지를 갖는 포락선 검출기
    • 具有增强线性范围的环境检测器
    • KR1020140040619A
    • 2014-04-03
    • KR1020130073656
    • 2013-06-26
    • 브로드콤 코포레이션
    • 치우,제니스하지-압둘하미드,아미르
    • H03D1/18
    • H03F3/245G01R19/04H03F2200/102H03F2203/45138
    • An envelope detector (ED) includes: a voltage-mode ED core which includes parallel detection transistors for detecting an envelope of a radio frequency (RF) signal input. The detection transistors are configured to make transistors be biased in sub-threshold operating regions with arbitrary size and arbitrary current. The ED core is formed to variably control the bias current which passes through the detection transistors and the bias current enhances a linear range of the ED by being varied according to a voltage amplitude of the RF signal input while the detection transistors continue to operate in the sub-threshold regions. A linearizer circuit is formed to control the bias current based on feedback inputs from ED outputs. The linearizer circuit, prior to the ED core which can include gain-programmable voltage amplifiers and a specialized class-AB amplifier, controls an output voltage of transmitter to the input range of the ED core and therefore, the linear range of the ED is extended. [Reference numerals] (100) Class AB RF amplifier; (102) Envelope detector core (Subthreshold biased); (104) Linearizer; (AA) TX output; (BB) TX output driver; (CC) Reading ADC
    • 包络检测器(ED)包括:电压模式ED芯,其包括用于检测射频(RF)信号输入的包络的并行检测晶体管。 检测晶体管被配置为使晶体管偏置在具有任意大小和任意电流的子阈值操作区域中。 ED芯形成为可变地控制通过检测晶体管的偏置电流,并且偏置电流通过根据RF信号输入的电压幅度而变化的ED的线性范围,同时检测晶体管继续在 次阈值区域。 形成线性化电路,以根据ED输出的反馈输入来控制偏置电流。 在ED核心之前,线性化电路可以包括增益可编程电压放大器和专门的AB类放大器,将发射机的输出电压控制到ED核心的输入范围,因此ED的线性范围被扩展 。 (参考号)(100)AB类射频放大器; (102)包络检测器芯(亚阈值偏置); (104)线性化; (AA)TX输出; (BB)TX输出驱动器; (CC)读取ADC
    • 6. 发明授权
    • 전력 품질의 모니터링 장치 및 그 방법
    • 电力质量监测装置及其方法
    • KR101264039B1
    • 2013-05-21
    • KR1020110138396
    • 2011-12-20
    • 삼성전기주식회사
    • 양완철이정후김경욱
    • G01R19/30
    • G01R19/0084G01R19/04G01R19/30
    • PURPOSE: A power quality monitoring apparatus and a method thereof are provided to rapidly measure power quality such as instantaneous voltage swell and sag through a calculation method of an amplitude of commercial voltage. CONSTITUTION: A power quality monitoring apparatus(100) includes a noise removal unit(110), a calculation unit(120), an accumulation unit(130), a gain control unit(140), an extraction unit(150), a judgment unit(160) and a control unit(170). The calculation unit calculates an absolute value of commercial voltage and consists of a rectifier(122) rectifying AC voltage. The accumulation unit outputs by accumulating an absolute value of commercial voltage in a predetermined period. The gain control unit controls the absolute value of commercial voltage by adding a gain to an absolute value of commercial voltage accumulated in the accumulation unit. The extraction unit samples the amplitude of commercial voltage being as the maximum value of the absolute value of commercial voltage accumulated in the accumulation unit in every period and outputs the amplitude. The judgment unit judges quality of the commercial voltage by comparing the maximum value of the accumulated absolute value of the sampled commercial voltage. [Reference numerals] (110) Noise removal unit; (120) Calculation unit; (122) Rectifier; (130) Accumulation unit; (140) Gain control unit; (150) Extraction unit; (160) Judgment unit; (162) First determiner; (164) Second determiner; (170) Control unit; (172) Detector; (174) Timing controller; (AA) Commercial voltage(Va); (BB) Output 1; (CC) Output 2
    • 目的:提供电力质量监测装置及其方法,通过商业电压幅度的计算方法快速测量诸如瞬时电压膨胀和下垂的电能质量。 电力质量监测装置(100)包括噪声去除单元(110),计算单元(120),累积单元(130),增益控制单元(140),提取单元(150),判断 单元(160)和控制单元(170)。 计算单元计算商业电压的绝对值,由整流器(122)整流交流电压组成。 累积单元通过在预定时间段内积累商业电压的绝对值来输出。 增益控制单元通过将增益加到积累单元中累积的商业电压的绝对值来控制商业电压的绝对值。 提取单元将商业电压的幅度作为在每个周期中累积在累积单元中的商业电压的绝对值的最大值进行采样,并输出幅度。 判断单元通过比较采样的商业电压的累计绝对值的最大值来判断商业电压的质量。 (附图标记)(110)噪声消除单元; (120)计算单位; (122)整流器; (130)累积单位; (140)增益控制单元; (150)提取单元; (160)判决单位; (162)第一确定者; (164)第二确定词; (170)控制单元; (172)检测器; (174)定时控制器; (AA)商业电压(Va); (BB)输出1; (CC)输出2
    • 7. 发明公开
    • 이동 평균을 이용한 새그 검출 방법
    • 使用移动平均的SAG或SWELL检测方法
    • KR1020070094161A
    • 2007-09-20
    • KR1020060024444
    • 2006-03-16
    • 엘에스산전 주식회사
    • 김성환
    • G01R19/165
    • G01R19/04G01R13/06G01R19/16528G01R31/001
    • A sag and swell detection method using a moving average is provided to supply stable power to a load by detecting voltage sag and swell without delay. A storage process is performed to store sampling voltage data into an array(204). A first production process is performed to produce an RMS(Root Mean Square) value during a half period by applying a moving average production method on the basis of an index of the array(206). An assignment process is performed to assign the RMS value as a reference voltage. A second production process is performed to produce a present RMS value by applying the moving average production method. A sag and swell is determined by using a ratio of the reference voltage and the present RMS value(208).
    • 提供使用移动平均线的下垂和膨胀检测方法,通过检测电压骤降并且不延迟地膨胀来向负载提供稳定的电力。 执行存储处理以将采样电压数据存储到阵列(204)中。 执行第一生产过程,以在半周期内通过基于阵列(206)的索引应用移动平均生产方法来产生RMS(均方根)值。 执行分配处理以将RMS值分配为参考电压。 执行第二生产过程以通过应用移动平均生产方法产生当前RMS值。 通过使用参考电压和当前RMS值的比(208)来确定下垂和膨胀。
    • 9. 发明公开
    • 유도가열기기용 전류 검출 회로
    • 用于检测电流的电路,特别是最小负载电流峰值的误差
    • KR1020040111062A
    • 2004-12-31
    • KR1020040044030
    • 2004-06-15
    • 권용재
    • 권용재
    • G05F1/567G01R19/15
    • G01R19/04G05F1/567H05B6/04
    • PURPOSE: A circuit for detecting a current with improved reliability is provided to improve accuracy by compensating a leakage current of a diode. CONSTITUTION: A current transformer(CT) receives a load current and transform it into a small current to output it. A resistor(R1) is connected to both ends of a secondary of the current transformer so as to set an output voltage of the secondary of the current transformer. A cathode of a diode(D1) is connected to an end of the secondary of the current transformer and an anode is connected to a non-inversion terminal of an operational amplifier(OA). An end of a capacitor(C1) is connected to the anode of the diode and the other is grounded. The non-inversion terminal of the operational amplifier is connected to the anode of the diode, an anode of a Zener diode(ZD1), and the end of the capacitor. An inversion terminal and an output terminal of the operational amplifier are connected to each other. The anode of the Zener diode is connected to the anode of the diode and a cathode is grounded.
    • 目的:通过补偿二极管的漏电流,提高了可靠性检测电流的电路,以提高精度。 构成:电流互感器(CT)接收负载电流并将其转换为小电流以输出。 电流(R1)连接到电流互感器的次级的两端,以设定电流互感器次级的输出电压。 二极管(D1)的阴极连接到电流互感器的次级的一端,并且阳极连接到运算放大器(OA)的非反相端子。 电容器(C1)的一端连接到二极管的阳极,另一端接地。 运算放大器的非反相端子连接到二极管的阳极,齐纳二极管(ZD1)的阳极和电容器的端部。 运算放大器的反相端子和输出端子彼此连接。 齐纳二极管的阳极连接到二极管的阳极,阴极接地。