公开(公告)号：WO01059928A1

公开(公告)日：2001-08-16

申请号：PCT/EP2000/001134

申请日：2000-02-11

IPC: H04R3/00 ,  H03F1/34 ,  H03F3/45 ,  H03F3/68 ,  H03H11/12 ,  H03H11/32 ,  H03K5/24 ,  H03M3/02

CPC classification number: H03H11/32 ,  H03F3/45991 ,  H03F2200/331 ,  H03H11/1217

Abstract: The invention relates to a balanced circuit arrangement for converting an asymmetric analogous input signal (S1) into a symmetrical output signal (S2, S3). A first amplifier (2) is provided, whereby the non-inverting input thereof is connected to the analogous input signal (S1) and the output signal (S2) thereof is fed back to the inverting input thereof in a negative feedback. Moreover, a second amplifier (3) is provided, whereby the non-inverting input thereof is connected to ground, the inverting input thereof is connected to the output signal (S2) of the first amplifier (2) by means of a series resistor (R2) and the output signal (S3) thereof is fed back to the inverting input thereof in a negative feedback and by means of a negative feedback resistor (R1). Said resistor (R1) and the series resistor (R2) are provided with the same resistance value. The aim of the invention is to process higher maximum levels of the source signal and to suppress noises of the second amplifier. The output signal (S3) of the second amplifier (3) is fed back to the base point of the signal source (1) for the analogous input signal (S1) in a negative feedback.

Abstract translation: 在用于不平衡模拟输入信号（S1）转换成一个平衡的输出信号（S2，S3）平衡的电路装置的第一放大器（2）被提供，其非反相输入端被连接到模拟输入信号（S1）和其输出信号（S2） 回其反相输入负反馈。 此外，（3）提供的第二放大器，其非反相输入端被连接到地，其反相输入端连接到经由一串联电阻器的第一放大器（2）的输出（S2）（R2）连接并且其输出信号（33） 一个负反馈电阻器（R1）被反馈到它的反相输入端，所述负反馈电阻器（R1）和所述串联电阻器（R2）具有相同的电阻值。 为了处理所述源信号的更高的最大电平，并抑制所述第二放大器的噪声，所以建议的输出信号的第二放大器（3）的信号源（1）的anologe输入信号的脚点的（S3）（S1）模拟为 输入信号（S1）gegenzukoppeln。

公开(公告)号：WO98056110A1

公开(公告)日：1998-12-10

申请号：PCT/US1998/000752

申请日：1998-01-14

IPC: H03H11/12 ,  H04B1/40 ,  H04N7/10 ,  H04N7/14 ,  H03K5/00 ,  H04B13/02

CPC classification number: H04B1/40 ,  H03H11/1217 ,  H04N7/10 ,  H04N7/141

Abstract: A narrow band-pass filter interferometric filter (20) for applying a response characteristic to an input signal (24) to produce a filtered output signal. The filter comprises an amplifier (22) having a first input for receiving the input signal (24), an interferometric processing circuit (26) coupled between an output and a second input of the amplifier (22) for producing a feedback signal having a generally constant positive amplitude except for a null at a pass frequency of the response characteristic for the filter. The signal processing circuit (26) may include a phase shift circuit for shifting the filtered out signal by 180 degrees or a delay time circuit for delaying the filtered output signal by a time period generally equal to the period required for the input signal (24) to oscillate through one-half of a cycle. The time delay circuit is implemented using a cable which imparts a time delay to a signal propagating therealong.

Abstract translation: 一种用于对输入信号（24）施加响应特性以产生经滤波的输出信号的窄带通滤波器干涉滤波器（20）。 滤波器包括具有用于接收输入信号（24）的第一输入端的放大器（22），耦合在放大器（22）的输出端和第二输入端之间的干涉处理电路（26），用于产生具有通常 过滤器的响应特性的通过频率除了零之外的恒定正振幅。 信号处理电路（26）可以包括用于将滤出的信号移位180度的相移电路或延迟时间电路，用于将滤波后的输出信号延迟一般等于输入信号（24）所需周期的时间周期， 振荡一半周期。 延时电路使用电缆来实现，该电缆对沿着其传播的信号施加时间延迟。

公开(公告)号：WO1996021970A1

公开(公告)日：1996-07-18

申请号：PCT/JP1996000026

申请日：1996-01-11

Applicant: IKEDA, Takeshi ,  OHE, Tadataka ,  NAKANISHI, Tsutomu

IPC: H03H11/12

CPC classification number: H03H11/1217 ,  H03H11/1291 ,  H03H11/20 ,  H03H11/481 ,  H03H11/483 ,  H03H11/485 ,  H03H2210/012 ,  H03H2210/015 ,  H03H2210/026 ,  H03H2210/028

Abstract: A tuning circuit which has a wide tuning bandwidth. The tuning bandwidth of the tuning frequency can be easily changed. The tuning circuit (1) is composed of two cascade-connected tuning amplifier sections (2 and 3). Each of the sections (2 and 3) is provided with cascade-connected phase-shifting circuits (10C and 30C), a voltage dividing circuit (60), and an adding circuit composed of a feedback resistor (70) and an input resistor (74). Prescribed tuning operation is performed by shifting the phase of a prescribed frequency by 360 DEG by means of the phase shifting circuits (10C and 30C) and setting the open loop gain of a feedback loop at less than (1) when the output of the voltage dividing circuit (60) is feedback. The resistance ratio between the feedback resistor (70) and input resistor (74) of each tuning amplifier section is adjusted in order that the maximum damping of each tuning amplifier section becomes smaller and the tuning bandwidth of each amplifier section becomes wider. Therefore, since the tuning amplifier sections are cascade-connected, the maximum damping is increased and the tuning bandwidth is widened as a whole.

Abstract translation: 具有宽调谐带宽的调谐电路。 调谐频率的调谐带宽可以很容易地改变。 调谐电路（1）由两个级联连接的调谐放大器部分（2和3）组成。 每个部分（2和3）设有级联的移相电路（10C和30C），分压电路（60）和由反馈电阻（70）和输入电阻（ 74）。 通过移相电路（10C和30C）将规定频率的相位移动360°并将反馈环路的开环增益设定为低于（1）的定时调谐操作，当电压的输出 分频电路（60）是反馈。 调整每个调谐放大器部分的反馈电阻器（70）和输入电阻器（74）之间的电阻比，使得每个调谐放大器部分的最大阻尼变小，并且每个放大器部分的调谐带宽变宽。 因此，由于调谐放大器部分级联连接，所以最大阻尼增加，调谐带宽整体变宽。

公开(公告)号：WO2017053710A1

公开(公告)日：2017-03-30

申请号：PCT/US2016/053322

申请日：2016-09-23

Applicant: ABB SCHWEIZ AG ,  XU, Jing ,  SCHNEIDER, Patrick, Erik

Inventor： XU, Jing ,  SCHNEIDER, Patrick, Erik

IPC: H02S50/10 ,  H02H3/20 ,  H02H3/44 ,  H02H3/46 ,  H02H3/50

CPC classification number: G01R31/024 ,  G01R19/165 ,  H02S50/10 ,  H03H11/1217 ,  H03H11/1286

Abstract: A unique electrical system includes a first electrical component and a second electrical component. A conductor electrically couples the first electrical component with the second electrical component. A sensor is constructed to sense an AC power flow in the conductor and output an AC signal proportional to the AC power flow. A band-pass filter is in electrical communication with the sensor and constructed to receive and filter the AC signal and to generate an AC voltage proportional on the AC signal. A controller is in electrical communication with the band-pass filter, and is operative to receive and sample the AC voltage. The controller is configured to execute program instructions to sum sequential AC voltage values received from the band-pass filter over a sample time period, and to determine whether an arc fault has occurred based on the summed AC voltage values.

Abstract translation: 独特的电气系统包括第一电气部件和第二电气部件。 导体将第一电气部件与第二电气部件电耦合。 传感器被构造成感测导体中的AC功率流并输出与AC功率流成比例的AC信号。 带通滤波器与传感器电连通，并被构造为接收和滤波AC信号并产生与AC信号成比例的AC电压。 控制器与带通滤波器电气通信，并且可操作以接收和采样AC电压。 控制器被配置为执行程序指令以在采样时间段内对从带通滤波器接收的顺序AC电压值进行求和，并且基于求和的AC电压值来确定是否发生了电弧故障。

公开(公告)号：WO2014123593A1

公开(公告)日：2014-08-14

申请号：PCT/US2013/067624

申请日：2013-10-30

Applicant: THE BOEING COMPANY

Inventor： NIKOLIC, Mark Ivan ,  MINARSCH, Stephen J.

IPC: H05B33/08 ,  G01D7/00 ,  H05B37/02

CPC classification number: H03H11/1217 ,  H05B33/0845 ,  H05B33/0854 ,  H05B37/0218 ,  Y02B20/46

Abstract: A method and apparatus for lighting a flight deck on an aircraft. A status of the aircraft is identified by a processor unit. The processor unit controls the lighting on the flight deck in response to the status of the aircraft to indicate the status of the aircraft.

Abstract translation: 一种用于照射飞机上的驾驶舱的方法和装置。 飞机的状态由处理器单元识别。 处理器单元根据飞行器的状态来控制驾驶舱上的照明，以指示飞机的状态。

公开(公告)号：WO2006014671A1

公开(公告)日：2006-02-09

申请号：PCT/US2005/025642

申请日：2005-07-19

Applicant: AERIELLE, INC. ,  GLISSMAN, John

Inventor： GLISSMAN, John

IPC: H04L27/04

CPC classification number: H03H11/1217 ,  H04H20/48

Abstract: An RC filter pole (R1, C1) for FM transmitters converts an internal 2-pole Bessel-type filter (R1, C1, C2) on a chipset (BH141XS/F) by adding an external filter function to create a 3-pole composite filter with improved roll-off characteristics. The design methodology and specific low cost circuit implementation of the composite filter effectively minimizes the impact of signal degradation on overall link performance.

Abstract translation: 用于FM发射器的RC滤波器极（R1，C1）通过添加外部滤波器功能来转换芯片组（BH141XS / F）上的内部2极贝塞尔型滤波器（R1，C1，C2），以创建3极复合 过滤器具有改进的滚降特性。 复合滤波器的设计方法和具体的低成本电路实现有效地将信号劣化对整体链路性能的影响降至最低。

公开(公告)号：WO1996036112A1

公开(公告)日：1996-11-14

申请号：PCT/GB1996001131

申请日：1996-05-13

Applicant: AMSTRAD PLC ,  GREENFIELD, Raymond

Inventor： AMSTRAD PLC

IPC: H03H11/12

CPC classification number: H04N1/00281 ,  H03H11/1217 ,  H04M19/08

Abstract: An isolating circuit for isolating a telephone set from an exchange passes a D.C. feed current but prevents A.C. currents over the range of operating frequencies of the equipment, typically about 300 Hz to 4 KHz. The circuit comprises a T-filter having two resistive branches arranged between the source and the load, and a capacitive branch arranged between the resistive branches and earth. The resistive branches each include a resistive element having an amplifier (A1, A2) in parallel with a resistor (R1, R4). The effective resistance of the resistive branches is dependent on the gain of the amplifier, which is isolated from D.C. by capacitors (C1, C2, C3, C4). The impedance of the capacitive branch is chosen so as to be lower than that of the resistive branches over the frequency range of interest thus isolating the two resistive branches from one another at those frequencies.

Abstract translation: 用于将电话机与交换机隔离的隔离电路通过直流供电电流，但防止在设备的工作频率范围内的通常为约300Hz至4KHz的交流电流。 电路包括具有布置在源极和负载之间的两个电阻分支的T滤波器，以及布置在电阻分支和地之间的电容分支。 电阻分支各自包括具有与电阻器（R1，R4）并联的放大器（A1，A2）的电阻元件。 电阻分支的有效电阻取决于放大器的增益，放大器通过电容器（C1，C2，C3，C4）与直流电隔离。 电容分支的阻抗被选择为低于感兴趣的频率范围上的电阻分支的阻抗，因此在这些频率处将两个电阻分支彼此隔离开。

公开(公告)号：WO1995034953A1

公开(公告)日：1995-12-21

申请号：PCT/JP1995001180

申请日：1995-06-13

Applicant: IKEDA, Takeshi ,  OHE, Tadataka

IPC: H03F03/191

CPC classification number: H03H11/1217 ,  H03F3/191 ,  H03F3/195

Abstract: A tuned amplifier that can be produced easily in an integrated circuit and by which the tuning frequency and the maximum damping are arbitrarily adjusted without mutual interference. The tuned amplifier is constituted of two phase shifting circuits (10C, 30C) each of which comprises a first serial circuit consisting of two resistors for dividing the voltage of the inputted AC signal to obtain a signal of half the voltage of the inputted signal, a second serial circuit consisting of a capacitor and a variable resistor for shifting the phase of the inputted signal by a predetermined angle, and a differential amplifier for amplifying the difference between the outputs of the first and second serial circuits, a noninverting circuit (50) connected to the input of the phase shifting circuit (10C) of the first stage, and an adding circuit which adds signals outputted from the phase shifting circuit (30C) of the second stage and input signals inputted to an input terminal (90) at a specific rate through a feedback resistor (70) and an input resistor (74).

Abstract translation: 可以在集成电路中容易地制造的调谐放大器，并且可以任意调整调谐频率和最大阻尼，而无需相互干扰。 调谐放大器由两个移相电路（10C，30C）构成，每个移相电路包括由两个电阻组成的第一串联电路，用于分压所输入的AC信号的电压，以获得输入信号电压的一半信号; 第二串联电路，包括电容器和用于将输入信号的相位偏移预定角度的可变电阻器，以及用于放大第一和第二串行电路的输出之间的差异的差分放大器，连接的同相电路（50） 到第一级的移相电路（10C）的输入端，以及相加电路，其将从第二级的移相电路（30C）输出的信号和输入到输入端子（90）的信号以特定的值 通过反馈电阻（70）和输入电阻（74）的速率。

公开(公告)号：WO1985001806A1

公开(公告)日：1985-04-25

申请号：PCT/US1984001671

申请日：1984-10-17

Applicant: MEMOREX CORPORATION

Inventor： MEMOREX CORPORATION ,  EL-SADI, Ashraf, I.

IPC: G05B05/01

CPC classification number: G05D3/14 ,  G11B5/59622 ,  G11B21/106 ,  H03H11/1217

Abstract: A novel technique and associated arrangement for determining the noise-free value of a system parameter which is time variable and has a noise component as detected. The technique involves processing the noise-including value and passing it through "Second Order/Summing" filter means (FF). The technique is particularly useful with the "track-following servo" in a high density disk file to secure superior head-displacement error values which are more noise-free. A pair of first values input to a summer (Sm) are secured by detecting motor current sense voltage (Vi) integrating it with respect to time and passing the result through a pair of novel "second order filter" means --one band-pass (F1), the other low-pass (F2); while also securing a third input to the summer (Sm) by detecting a position error signal voltage (Vxi), including noise components (M(s)) in the usual manner and passing it through a "second order low-pass" filter (F3); then algebraically summing these to secure a relatively noise-free position error signal (Vxo). Thus, the summing filter array gates the position-error voltage (Vxi) but attenuates the (mechanical) noise component (M(s)).

公开(公告)号：WO2012138781A2

公开(公告)日：2012-10-11

申请号：PCT/US2012032199

申请日：2012-04-04

Applicant: BROOKHAVEN SCIENCES ASS LLC ,  DE GERONIMO GIANLUIGI ,  LI SHAORUI

Inventor： DE GERONIMO GIANLUIGI ,  LI SHAORUI

CPC classification number: H03H1/0007 ,  H03F1/34 ,  H03F3/211 ,  H03F3/70 ,  H03F2200/144 ,  H03F2200/408 ,  H03H11/1217

Abstract: An analog filter is presented that comprises a chain of filter stages, a feedback resistor for providing a negative feedback, and a feedback capacitor for providing a positive feedback. Each filter stage has an input node and an outpout node. The output node of a filter stage is connected to the input node of an immediately succeeding filter stage through a resistor. The feedback resistor has a first end connected to the output node of the last filter stage along the chain of filter stages, and a second end connected to the input node of a first preceding filter stage. The feedback capacitor has a first end connected to the output node of one of the chain of filter stages, and a second end connected to the input node of a second preceding filter stage.

Abstract translation: 提出了一种模拟滤波器，其包括一系列滤波器级，用于提供负反馈的反馈电阻器和用于提供正反馈的反馈电容器。 每个滤波器级具有输入节点和输出节点。 滤波器级的输出节点通过电阻连接到紧随其后的滤波级的输入节点。 反馈电阻器具有连接到滤波器级链的最后一个滤波器级的输出节点的第一端，以及连接到第一先前滤波器级的输入节点的第二端。 反馈电容器具有连接到滤波器级链中的一个的输出节点的第一端，以及连接到第二在前滤波器级的输入节点的第二端。