公开(公告)号：WO2016195859A1

公开(公告)日：2016-12-08

申请号：PCT/US2016/029708

申请日：2016-04-28

Applicant: RF MICRO DEVICES, INC.

Inventor： FRANCK, Steven, James ,  WANG, Xin ,  OSKOUI, Alireza

IPC: H03F1/32 ,  H03F1/22 ,  H03F1/02 ,  H03F1/56 ,  H03F3/24 ,  H03F3/195 ,  H03G1/00 ,  H03G3/30

CPC classification number: H03F1/3258 ,  H03F1/0205 ,  H03F1/0266 ,  H03F1/223 ,  H03F1/3205 ,  H03F1/3223 ,  H03F1/56 ,  H03F3/193 ,  H03F3/195 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/108 ,  H03F2200/18 ,  H03F2200/211 ,  H03F2200/222 ,  H03F2200/228 ,  H03F2200/234 ,  H03F2200/246 ,  H03F2200/301 ,  H03F2200/318 ,  H03F2200/321 ,  H03F2200/408 ,  H03F2200/42 ,  H03F2200/435 ,  H03F2200/451 ,  H03F2200/465 ,  H03F2200/61 ,  H03F2200/75 ,  H03F2200/99 ,  H03F2201/3212 ,  H03F2201/3218 ,  H03G3/3042 ,  H03G2201/106 ,  H03G2201/40

Abstract: The present disclosure relates to a power amplifier (PA) system provided in a semiconductor device and having feed forward gain control. The PA system comprises a transmit path and control circuitry. The transmit path is configured to amplify an input radio frequency (RF) signal and comprises a first tank circuit and a PA stage. The control circuitry is configured to detect a power level associated with the input RF signal and control a first bias signal provided to the PA stage based on a first function of the power level and control a quality factor (Q) of the first tank circuit based on a second function of the power level.

Abstract translation: 本公开涉及一种设置在半导体器件中并具有前馈增益控制的功率放大器（PA）系统。 PA系统包括发射路径和控制电路。 发射路径被配置为放大输入射频（RF）信号，并且包括第一坦克电路和PA级。 所述控制电路被配置为检测与所述输入RF信号相关联的功率电平，并且基于所述功率电平的第一功能来控制提供给所述PA级的第一偏置信号，并且基于所述第一电路的质量因子（Q）来控制 在功率级的第二功能。

公开(公告)号：WO2016083081A1

公开(公告)日：2016-06-02

申请号：PCT/EP2015/075433

申请日：2015-11-02

Applicant: BANG & OLUFSEN ICEPOWER A/S

Inventor： SKOV ANDERSEN, Kennet

IPC: H03F3/187 ,  H03F3/217 ,  H03F1/30 ,  H03F3/45 ,  H03G3/34

CPC classification number: H03F1/305 ,  H03F1/02 ,  H03F3/183 ,  H03F3/187 ,  H03F3/217 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/129 ,  H03F2200/135 ,  H03F2200/144 ,  H03F2200/156 ,  H03F2200/258 ,  H03F2200/342 ,  H03F2200/426 ,  H03F2200/441 ,  H03F2200/444 ,  H03F2200/66 ,  H03F2200/78 ,  H03G3/301 ,  H03G3/348 ,  H03G2201/106

Abstract: A close-down pop reduction system and a method for close-down pop reduction in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path having a compensator and a switching power stage and a signal path from an output of a comparator in the switching power stage to a sequence control unit. The signal path includes a close-down timing circuit configured to provide a timing signal. The sequence control unit is configured to eliminate the input signal, increase the switch frequency of the close-down pop reduction system and disable the switching power stage at a moment in time within a PWM pulse of the switching power stage. Hereby, it is e.g. possible to minimize the audible pop during close- down of audio amplifier assemblies.

Abstract translation: 公开了一种用于音频放大器组件中的关闭弹出缩小系统和关闭弹出缩小的方法。 开关功率转换系统包括具有补偿器和开关功率级的正向路径以及从开关功率级的比较器的输出到序列控制单元的信号路径。 信号路径包括被配置为提供定时信号的关闭定时电路。 顺序控制单元被配置为消除输入信号，增加关闭弹出式缩小系统的开关频率，并且在开关功率级的PWM脉冲内的时间上禁用开关功率级。 因此，例如 可能在关闭音频放大器组件期间最小化可听见的音乐。

公开(公告)号：KR1020110062071A

公开(公告)日：2011-06-10

申请号：KR1020090118655

申请日：2009-12-02

Applicant: 현대모비스 주식회사

Inventor： 조상호

IPC: H04B1/10 ,  H04B1/16

CPC classification number: H04B1/1081 ,  H03G3/3068 ,  H03G2201/106 ,  H04B1/16

Abstract: PURPOSE: An automatic gain controller of a radio receiver and method thereof are provided to reduce the intensity of an RF signal and to minimize the inflow of radio interference broadcast component. CONSTITUTION: A level detecting unit(2) detects the electric field level of an intermediate frequency signal. An attenuation control unit(3) compares the electric field level of the intermediate frequency signal with the electric field level of high frequency. The attenuation control unit decides the inflow of the radio interference broadcast component. If so, the attenuation control unit outputs an attenuation control signal.

Abstract translation: 目的：提供一种无线电接收机的自动增益控制器及其方法，以降低RF信号的强度，并使无线电干扰广播组件的流入最小化。 构成：电平检测单元（2）检测中频信号的电场电平。 衰减控制单元（3）将中频信号的电场电平与高频电场电平进行比较。 衰减控制单元决定无线电干扰广播组件的流入。 如果是，则衰减控制单元输出衰减控制信号。

公开(公告)号：US11791778B2

公开(公告)日：2023-10-17

申请号：US17894069

申请日：2022-08-23

Applicant: Biamp Systems, LLC

Inventor： Aaron Faulstich

IPC: H03F1/32 ,  G10L25/21 ,  H03G3/30 ,  H03G11/00 ,  H04R3/00 ,  H04R3/02 ,  H04R3/04

CPC classification number: H03F1/3264 ,  G10L25/21 ,  H03G3/3005 ,  H03G11/008 ,  H04R3/007 ,  H04R3/02 ,  H04R3/04 ,  H03G2201/106

Abstract: Example embodiments provide a process that includes one or more of receiving an audio signal from a feedback path of a feedback compressor circuit, determining whether an auxiliary attenuation value applied to the feedback compressor circuit has changed since a last audio signal was received, responsive to determining the auxiliary value has changed, determining a current operational state value of the LPF needs to be modified based on the changed auxiliary attenuation value, modifying the operational state value of the LPF, and applying the audio signal to the modified LPF.

公开(公告)号：US20180337641A1

公开(公告)日：2018-11-22

申请号：US15597937

申请日：2017-05-17

Applicant: Zinwave, Ltd.

Inventor： John Prentice ,  Alessandro Bertoneri ,  Chris Potter

IPC: H03F1/32 ,  H03F3/19 ,  H03G3/20 ,  H04B10/272 ,  H04W88/08 ,  H04B10/2575 ,  H04B10/61

CPC classification number: H03F1/32 ,  H03F3/19 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/411 ,  H03F2200/451 ,  H03G3/20 ,  H03G2201/106 ,  H04B10/25753 ,  H04B10/25754 ,  H04B10/272 ,  H04B10/6163 ,  H04B2210/003 ,  H04B2210/006 ,  H04B2210/252 ,  H04W88/085

Abstract: A system has a plurality of non-linear circuit stages and an intervening linear circuit stage. An input signal is provided to a first non-linear circuit stage, and from the first non-linear circuit stage, to the linear circuit stage. The first non-linear circuit stage applies a second-order distortion to the input signal and provides the resulting signal to the linear circuit stage. The resulting signal that is output from the linear circuit stage is inverted with respect to the input signal and suitably linearly processed (attenuated or amplified). This signal is then provided to a second non-linear circuit that applies a second-order distortion and outputs a signal that has an overall reduction in second-order distortion.

公开(公告)号：US20180191310A1

公开(公告)日：2018-07-05

申请号：US15642484

申请日：2017-07-06

Applicant: Texas Instruments Incorporated

Inventor： Shun QIAN ,  Kim Nordtorp MADSEN ,  Lucia WAN

IPC: H03F1/32 ,  H03F3/181 ,  H03F1/26 ,  H03F3/217 ,  H03G3/20

CPC classification number: H03F1/32 ,  H03F1/26 ,  H03F3/181 ,  H03F3/217 ,  H03F2200/03 ,  H03F2200/471 ,  H03G3/20 ,  H03G2201/106

Abstract: The disclosed embodiments include an audio amplifier system configured to provide a total harmonic distortion (THD) controlled clip detector and an automatic gain limiter (AGL) solution for a closed-loop amplifier. The audio amplifier system is capable of maintaining high power output without hard distortion (i.e., hard clipping) for providing better acoustics, while preventing damage to the system.

公开(公告)号：US20180183409A1

公开(公告)日：2018-06-28

申请号：US15852237

申请日：2017-12-22

Applicant: Texas Instruments Incorporated

Inventor： Rajendrakumar Joish ,  Visvesvaraya Pentakota

IPC: H03H11/24 ,  H03H7/25 ,  H03G1/00 ,  H03K17/687 ,  H01F38/14

CPC classification number: H03H11/245 ,  H01F38/14 ,  H03G1/0088 ,  H03G3/001 ,  H03G3/3052 ,  H03G2201/106 ,  H03H7/25 ,  H03K17/687 ,  H04B1/18

Abstract: The disclosure provides an RF receiver. The RF receiver includes an input driver. The input driver receives a coarse signal, and generates an input signal. A digital step attenuator (DSA) is coupled to the input driver and receives the input signal. An analog to digital converter (ADC) is coupled to the DSA. The DSA includes a serial capacitor coupled to the input driver. The DSA also includes a sampling capacitor coupled to the ADC.

公开(公告)号：US20180138990A1

公开(公告)日：2018-05-17

申请号：US15808358

申请日：2017-11-09

Applicant: SKYWORKS SOLUTIONS, INC.

Inventor： Adrian John Bergsma ,  Peihua Ye ,  Thomas Obkircher ,  Peter Harris Robert Popplewell ,  Gregory Edward Babcock ,  William J. Domino

IPC: H04B15/00 ,  H03G3/30 ,  H03F1/56 ,  H03F3/19 ,  H03F3/72 ,  H04B1/40

CPC classification number: H04B15/00 ,  H03F1/56 ,  H03F3/19 ,  H03F3/72 ,  H03F2200/387 ,  H03F2200/451 ,  H03F2203/7212 ,  H03G3/3042 ,  H03G3/348 ,  H03G2201/106 ,  H04B1/0458 ,  H04B1/18 ,  H04B1/40 ,  H04B1/44

Abstract: Systems and methods are provided for reducing the effects of an impedance mismatch between a communications system and a shared communications medium. A communication system, such as a transceiver within a cable modem, switches between various operating modes including a transmit mode, a receive mode, and a standby mode. The standby mode may be used while the transceiver is in an idle state between modes, such as while changing an amplifier gain states in between transmissions. While transitioning between modes, the impedance presented by the communications system can temporarily fluctuate causing unwanted signal reflections to propagate out of the communications system and on to the shared medium. Circuitry within the communications system, such as transmission circuitry including an adjustable attenuator, may be placed into a hybrid attenuation-isolation mode during the transition causing the magnitude of any unwanted signal reflections to be attenuated and reducing the impact on the shared medium.

公开(公告)号：US20180138878A1

公开(公告)日：2018-05-17

申请号：US15808341

申请日：2017-11-09

Applicant: SKYWORKS SOLUTIONS, INC.

Inventor： William J. Domino ,  Thomas Obkircher ,  Adrian John Bergsma ,  Peihua Ye

IPC: H03G3/30 ,  H03F1/56 ,  H03F1/02 ,  H03F3/195

CPC classification number: H03G3/30 ,  H03F1/0205 ,  H03F1/56 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/09 ,  H03F2200/294 ,  H03F2200/387 ,  H03F2200/451 ,  H03G1/0088 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/106

Abstract: Amplifier systems and methods are provided that include a fixed gain amplification stage coupled to an adjustable attenuation stage further coupled to a variable gain amplification stage. A controller controls an amount of attenuation provided by the adjustable attenuation stage and an amount of gain provided by the variable gain amplification stage to maintain any of various noise, efficiency, and/or linearity requirements of the amplifier system.

公开(公告)号：US09876475B2

公开(公告)日：2018-01-23

申请号：US15344304

申请日：2016-11-04

Applicant: Freescale Semiconductor, Inc.

Inventor： Abdulrhman M. S. Ahmed ,  Mario M. Bokatius ,  Paul R. Hart ,  Joseph Staudinger ,  Richard E. Sweeney

IPC: G06G7/12 ,  H03F1/02 ,  H03F3/21 ,  H03F3/60 ,  G06G7/10 ,  H03F3/68 ,  H03F3/189 ,  H04L7/00 ,  G06F13/42 ,  H03F3/19 ,  H04L27/22 ,  H03G1/00

CPC classification number: H03F1/0288 ,  G06F13/4282 ,  G06G7/10 ,  H03F3/189 ,  H03F3/19 ,  H03F3/211 ,  H03F3/602 ,  H03F3/68 ,  H03F2200/387 ,  H03F2200/438 ,  H03F2200/451 ,  H03F2203/21106 ,  H03F2203/21193 ,  H03G1/0088 ,  H03G2201/106 ,  H04L7/0079 ,  H04L27/22

Abstract: Embodiments of circuits for use with an amplifier that includes multiple amplifier paths include a first circuit and a second circuit in parallel with the first circuit. The first circuit includes a first input coupled to a first power divider output, a first output coupled to a first amplifier path of the multiple amplifier paths, and a first adjustable phase shifter and a first attenuator series coupled between the first input and the first output. The second circuit includes a second input coupled to a second power divider output, a second output coupled to a second amplifier path of the multiple amplifier paths, and a second adjustable phase shifter coupled between the second input and the second output.