公开(公告)号：US20180062595A1

公开(公告)日：2018-03-01

申请号：US15788505

申请日：2017-10-19

申请人： OLYMPUS CORPORATION

发明人： Masato Osawa ,  Yasunari Harada ,  Hideki Kato

IPC分类号： H03F3/72 ,  H03G1/00 ,  H03F1/26 ,  H03F3/45 ,  H03M1/12

CPC分类号： H03F3/72 ,  H03F1/26 ,  H03F3/45475 ,  H03F2200/135 ,  H03F2200/213 ,  H03F2200/411 ,  H03F2200/45 ,  H03F2203/45514 ,  H03F2203/45551 ,  H03F2203/7231 ,  H03G1/0094 ,  H03G3/001 ,  H03M1/1245

摘要： In a semiconductor device, a first variable gain amplifier and a second variable gain amplifier constitute a switched capacitor type variable gain amplifier. A selection switch switches connection among the first variable gain amplifier, the second variable gain amplifier, and a load circuit such that the first variable gain amplifier and the load circuit are connected to each other when an amplification factor of the first variable gain amplifier is a predetermined gain or less, and the second variable gain amplifier is connected between the first variable gain amplifier and the load circuit when the amplification factor of the first variable gain amplifier is larger than the predetermined gain.

公开(公告)号：US20170289930A9

公开(公告)日：2017-10-05

申请号：US14523982

申请日：2014-10-27

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： HUIJUNG KIM ,  SANGHOON KANG ,  SOOYONG KIM ,  CHAEHAG YI ,  HYEONGSEOK JEONG

IPC分类号： H04W52/52 ,  H03G3/30 ,  H03F3/19

CPC分类号： H03G3/3036 ,  H03F3/19 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/7231 ,  H03F2203/7239 ,  H03G3/3052 ,  H03G3/3068 ,  H04W52/52 ,  H04W88/06

摘要： A method is provided for operating a radio frequency (RF) receiver including a transimpedance amplifier, a capacitor selectively connected in parallel with the transimpedance amplifier, a channel selection filter unit connected to an output terminal of the transimpedance amplifier, and a variable gain amplification unit selectively connected in parallel with the channel selection filter unit. The method includes measuring signal-to-noise ratio from an output of the RF receiver, and comparing the measured signal-to-noise ratio with a reference signal-to-noise ratio. When the measured signal-to-noise ratio is greater than the reference signal-to-noise ratio, the capacitor is electrically disconnected from being connected in parallel with the transimpedance amplifier and a variation in the measured signal-to-noise ratio is measured. When the measured variation is in tolerance, the channel selection filter is bypassed to select the variable gain amplification unit.

公开(公告)号：US20160192295A1

公开(公告)日：2016-06-30

申请号：US14986069

申请日：2015-12-31

申请人： Samsung Electronics Co., Ltd.

发明人： Ju-Ho Son ,  Jeong-Ho Lee ,  Chul-Woo Byeon ,  Dae-Young Lee ,  Sun-Kyu Choi

IPC分类号： H04W52/02 ,  H03F3/193 ,  H04W52/18

CPC分类号： H04W52/0225 ,  H03F1/0277 ,  H03F3/19 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/321 ,  H03F2200/451 ,  H03F2203/7231 ,  H03F2203/7239 ,  H03G3/3052 ,  H03G3/3078 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/21

摘要： An apparatus and method for controlling power in a communication system are provided. The method includes amplifying an input signal by a second processor farther from an antenna than a first processor, and determining whether to enable or disable each of the first processor and the second processor based on results from the amplification by the second processor. Another method includes amplifying an input signal from an antenna by a second processor electrically farther from the antenna than a first processor, and determining whether to operate the first processor and the second processor based on a value related to a reception state for the amplified signal by the second processor.

摘要翻译： 提供了一种用于控制通信系统中的电力的装置和方法。 该方法包括：通过第二处理器比第一处理器放大比天线更远的输入信号，以及基于由第二处理器的放大的结果确定是启用还是禁用第一处理器和第二处理器中的每一个。 另一种方法包括：通过第二处理器从天线放大与第一处理器电离距离天线的输入信号，并且基于与放大信号的接收状态相关的值来确定是否操作第一处理器和第二处理器 第二个处理器。

公开(公告)号：US08749307B2

公开(公告)日：2014-06-10

申请号：US13219231

申请日：2011-08-26

申请人： Xu Zhu ,  Michael Brobston ,  Lup M. Loh

发明人： Xu Zhu ,  Michael Brobston ,  Lup M. Loh

IPC分类号： H03G3/20 ,  H03F1/14

CPC分类号： H03F1/14 ,  H03F1/0233 ,  H03F1/0261 ,  H03F1/0277 ,  H03F3/19 ,  H03F3/72 ,  H03F2203/7231 ,  H03F2203/7239 ,  H03G3/3042

摘要： An apparatus and method amplify a signal for use in a wireless network. The apparatus includes a power amplifier, an envelope modulator, a tunable matching network (TMN), and a controller. The power amplifier outputs the signal at an output power. The envelope modulator controls a bias setting for the power amplifier. The TMN includes a plurality of immittance elements. The controller is operably connected the envelope modulator and the TMN. The controller identifies a desired value for the output power of the power amplifier, controls the output power of the power amplifier by modifying the bias setting of the power amplifier, and sets a number of the plurality of immittance elements based on the bias setting of the power amplifier.

摘要翻译： 装置和方法放大用于无线网络的信号。 该装置包括功率放大器，包络调制器，可调匹配网络（TMN）和控制器。 功率放大器以输出功率输出信号。 包络调制器控制功率放大器的偏置设置。 TMN包括多个导纳元件。 控制器可操作地连接包络调制器和TMN。 控制器识别功率放大器的输出功率的期望值，通过修改功率放大器的偏置设置来控制功率放大器的输出功率，并且基于该功率放大器的偏置设置来设置多个导纳元件的数量 功率放大器。

公开(公告)号：US20130328708A1

公开(公告)日：2013-12-12

申请号：US13889405

申请日：2013-05-08

申请人： Dan RAPHAELI

发明人： Dan RAPHAELI

IPC分类号： H03M1/12 ,  H03F3/68

CPC分类号： H03M1/12 ,  H03F3/45183 ,  H03F3/68 ,  H03F3/72 ,  H03F2203/45101 ,  H03F2203/45506 ,  H03F2203/7231 ,  H03M1/361

摘要： The subject matter discloses a flash analog to digital converter arranged in a tree of signal amendment units, each comprises an amplifier and an offset adder. The output signals of the tree are even partitioned and compared to comparators, to reduce the level of accuracy required from the comparators. The subject matter also discloses a cascade of amplifiers connected in series and operate in delay one relative to the other, each amplifier comprises a reset unit to reset the amplifier responsive to receipt of a signal.

摘要翻译： 主题公开了一种布置在信号修正单元树中的闪存模数转换器，每个包括放大器和偏移加法器。 树的输出信号被均匀分割并与比较器进行比较，以降低比较器所需的准确度。 主题还公开了串联连接的级联放大器并相对于另一个延迟工作，每个放大器包括复位单元，用于响应于接收到信号来复位放大器。

公开(公告)号：US20100128898A1

公开(公告)日：2010-05-27

申请号：US12324452

申请日：2008-11-26

申请人： LANCE M. WONG

发明人： LANCE M. WONG

IPC分类号： H04B15/00 ,  H03F1/14

CPC分类号： H03F1/305 ,  H03F3/187 ,  H03F3/3022 ,  H03F3/45192 ,  H03F3/45475 ,  H03F3/72 ,  H03F2200/03 ,  H03F2200/165 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2203/30021 ,  H03F2203/45534 ,  H03F2203/45648 ,  H03F2203/7231

摘要： A circuit, system and method provide the suppression of pop at power up of audio amplifiers. The output driver is tri-stated at power up and is enabled after a predetermined time constant. In one embodiment, the output driver includes a MOS transistor pair connected in a push-pull configuration and switches that are under the control of a delay circuit. the. The output driver and the delay circuit may be part of a power amplifier in an audio system. The delay circuit may be implemented using mixed analog and digital signals or a digital controller configured to receive a clock frequency and execute a machine readable program code. The delay circuit is responsive for the start-up behavior of the audio system.

摘要翻译： 电路，系统和方法提供抑制音频放大器上电时的弹出。 输出驱动器在上电时为三态，并且在预定时间常数之后被使能。 在一个实施例中，输出驱动器包括以推挽配置连接的MOS晶体管对和处于延迟电路的控制下的开关。 的。 输出驱动器和延迟电路可以是音频系统中功率放大器的一部分。 延迟电路可以使用混合模拟和数字信号来实现，或者数字控制器被配置为接收时钟频率并执行机器可读程序代码。 延迟电路响应于音频系统的启动行为。

公开(公告)号：US20090315621A1

公开(公告)日：2009-12-24

申请号：US12143669

申请日：2008-06-20

申请人： Chiewcharn Narathong ,  Sankaran Aniruddhan ,  Wenjun Su

发明人： Chiewcharn Narathong ,  Sankaran Aniruddhan ,  Wenjun Su

IPC分类号： H03F1/14 ,  H03F3/68

CPC分类号： H03F1/3276 ,  H03F1/301 ,  H03F1/308 ,  H03F1/3241 ,  H03F3/245 ,  H03F3/3022 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2200/453 ,  H03F2203/30099 ,  H03F2203/30132 ,  H03F2203/7231

摘要： Techniques are disclosed for extending an amplifier's linear operating range by concatenating an amplifier exhibiting gain compression with a gain expansion stage. In an exemplary embodiment, a gain expansion stage incorporates a Class-B stage, a Class-AB stage, or a combination of the two. In an exemplary embodiment, both the gain compression stage and gain expansion stage are provided with a replica current biasing scheme to ensure stable biasing current over variations in temperature, process, and/or supply voltage. Further disclosed is an output voltage biasing scheme to set the DC output voltage to ensure maximum linear operating range.

摘要翻译： 公开了通过将展现增益压缩的放大器与增益扩展级相连接来扩展放大器的线性工作范围的技术。 在示例性实施例中，增益扩展阶段包括B类阶段，AB类阶段或两者的组合。 在示例性实施例中，增益压缩级和增益扩展级均被提供有复制电流偏置方案，以确保温度，过程和/或电源电压变化的稳定的偏置电流。 进一步公开了一种用于设置直流输出电压以确保最大线性工作范围的输出电压偏置方案。

公开(公告)号：US20080136513A1

公开(公告)日：2008-06-12

申请号：US11634659

申请日：2006-12-06

申请人： Ismail Lakkis

发明人： Ismail Lakkis

IPC分类号： H03F1/14

CPC分类号： H03F3/72 ,  H03F1/0277 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/405 ,  H03F2200/451 ,  H03F2203/7231 ,  H03F2203/7239 ,  H03G1/0088 ,  H03G3/3052

摘要： A multi-stage amplifier configured for processing a received baseband signal comprises a plurality of fixed-gain amplifier stages and an automatic gain control (AGC) module. Each amplifier stage further comprises a switch and a bypass circuit. The AGC module is configured for controlling the switch for bypassing at least one of the amplifier stages. The multi-stage amplifier may be configured to perform fine gain adjustment and coarse gain adjustment, wherein fine gain adjustment may comprise adjusting a load-resistor value in at least one amplifier and coarse gain adjustment may comprise bypassing one or more fixed-gain amplifier stages.

摘要翻译： 配置用于处理接收的基带信号的多级放大器包括多个固定增益放大器级和自动增益控制（AGC）模块。 每个放大器级还包括开关和旁路电路。 AGC模块被配置用于控制用于旁路至少一个放大器级的开关。 多级放大器可以被配置为执行精细增益调整和粗增益调整，其中精细增益调整可以包括调整至少一个放大器中的负载电阻器值，并且粗增益调整可以包括旁路一个或多个固定增益放大器级 。

公开(公告)号：US20070257999A1

公开(公告)日：2007-11-08

申请号：US11428573

申请日：2006-07-05

申请人： Kuo-Yu Chou

发明人： Kuo-Yu Chou

IPC分类号： H04N5/335

CPC分类号： H04N5/335 ,  H03F1/0277 ,  H03F3/72 ,  H03F2200/552 ,  H03F2203/7231 ,  H03F2203/7236 ,  H03F2203/7239 ,  H03G1/0088 ,  H04N5/243 ,  H04N5/378

摘要： A variable-gain amplifier circuit and a method of changing gain amplifier paths are provided for receiving and amplifying an image sensing signal. The variable-gain amplifier circuit includes variable path and gain amplifier circuits. According to the amplification factor for the image sensing signal, the gain amplifier paths in the variable path and gain amplifier circuits are changed based on a control signal, so as to achieve the appropriate construction of the variable-gain amplifier circuit. The image sensing signal generates the required image result through appropriate numbers of variable gain amplifiers, thereby decreasing the power consumption of the circuit and reducing the design requirement of the circuit.

摘要翻译： 提供可变增益放大器电路和改变增益放大器路径的方法，用于接收和放大图像感测信号。 可变增益放大器电路包括可变路径和增益放大器电路。 根据图像感测信号的放大系数，可变路径和增益放大器电路中的增益放大器路径基于控制信号而改变，以便实现可变增益放大器电路的适当构造。 图像感测信号通过适当数量的可变增益放大器产生所需的图像结果，从而降低电路的功耗并降低电路的设计要求。

公开(公告)号：US07126417B2

公开(公告)日：2006-10-24

申请号：US10835944

申请日：2004-04-29

申请人： Donald M. Bishop

发明人： Donald M. Bishop

IPC分类号： H03F3/68

CPC分类号： H04B3/36 ,  G01S1/00 ,  H03F3/72 ,  H03F2203/7231 ,  H03F2203/7239 ,  H04B1/74 ,  H04B1/745 ,  H04B3/542 ,  H04B2203/5445 ,  H04B2203/5483 ,  H04H20/78 ,  H04N7/104 ,  H04N7/17309 ,  H04N21/6118 ,  H04N21/6168

摘要： A system and method for a distribution network is provided wherein cascaded power amplifiers with bypass switching are disposed along the branches of the network. The amplifiers may have an RF modem and a programmable digital computer that enables communication with a headend or a controlling computer as well as a bypass switch control for disabling the amplification function of the amplifiers. The amplifier may have a wireless communication system for communicating with individual subscriber's homes and communicating with a neighboring amplifier system for use in emergency situations or during installation and configuration of the network. The network comprised of the amplifiers may have redundant signal paths, using the wireless communication devices of the amplifiers, which may be used as backup signal paths for certain communications requiring high uptime such as telephony.

摘要翻译： 提供一种用于分配网络的系统和方法，其中具有旁路切换的级联功率放大器沿着网络的分支布置。 放大器可以具有RF调制解调器和可编程数字计算机，其能够与头端或控制计算机进行通信，以及用于禁用放大器的放大功能的旁路开关控制。 放大器可以具有无线通信系统，用于与各个用户的家庭进行通信，并与邻近放大器系统进行通信，以在紧急情况下或在网络的安装和配置期间使用。 由放大器组成的网络可以使用放大器的无线通信设备的冗余信号路径，其可以用作需要高正常时间（例如电话）的某些通信的备用信号路径。