公开(公告)号：US20240340581A1

公开(公告)日：2024-10-10

申请号：US18403633

申请日：2024-01-03

申请人： AAC Technologies (Nanjing) Co., Ltd.

发明人： Hongling Fu ,  Ruizhi Lan ,  Lijian Ye

IPC分类号： H04R3/00 ,  H03G3/30 ,  H04R3/04

CPC分类号： H04R3/007 ,  H03G3/3078 ,  H04R3/04

摘要： A speaker displacement protection method, a speaker displacement protection device, and a computer-readable storage medium are provided. The speaker displacement protection method includes creating a target transfer function based on a real-time amplitude of the speaker and a fusion voltage relative to the combination device, determining target gains according to the target transfer function and a predetermined displacement threshold, and performing gain processing on an original audio signal input to the combination device based on the target gains, so as to provide displacement protection for the speaker. As such, accuracy of the speaker displacement protection is improved while audio distortion is reduced.

公开(公告)号：US11888540B2

公开(公告)日：2024-01-30

申请号：US17355040

申请日：2021-06-22

申请人： Silicon Laboratories Inc.

发明人： Hendricus de Ruijter

IPC分类号： H04B17/345 ,  H04L9/40 ,  H04B17/318 ,  H03G3/30 ,  H04W12/63

CPC分类号： H04B17/345 ,  H03G3/3078 ,  H04B17/318 ,  H04L63/1466 ,  H04W12/63

摘要： An apparatus includes a radio-frequency (RF) receiver, which includes an automatic gain-control (AGC) circuit to use a gain signal to set a gain of front-end circuitry of the RF receiver. The RF receiver further includes an interference-detection circuit to use a value of the gain signal to detect an interference signal.

公开(公告)号：US20180302052A1

公开(公告)日：2018-10-18

申请号：US15758736

申请日：2015-09-25

申请人： Intel IP Corporation

发明人： Jee Hyun Kim ,  Prabin Kumar Pandey ,  Yubao Li ,  Gunnar Nitsche

IPC分类号： H03G3/30 ,  H03F3/19 ,  H04B1/16 ,  H04B17/318

CPC分类号： H03G3/3036 ,  H03F3/19 ,  H03G3/3052 ,  H03G3/3078 ,  H04B1/16 ,  H04B17/318

摘要： A circuit may include at least one amplifier circuit configured to amplify a received signal having a first signal received in a first time interval and a second signal received in a second time interval. The first signal and the second signal are signals sent by a different number of coherent wireless signal sources. The circuit arrangement may further include at least one gain control circuit connected to the at least one amplifier circuit and configured to determine a first expected received signal strength of the first signal, to determine a second expected received signal strength of the second signal, and to determine a gain level based on the first and second expected received signal strengths. The at least one amplifier circuit may be configured to amplify the first signal using the determined gain level and to amplify the second signal using the determined gain level.

公开(公告)号：US20180183393A1

公开(公告)日：2018-06-28

申请号：US15796315

申请日：2017-10-27

申请人： ADVANTEST Corporation

发明人： Kiyotaka Kasahara

IPC分类号： H03F3/21 ,  H03G3/30 ,  H03F3/45 ,  H02M1/08

CPC分类号： H03F3/21 ,  H02M1/08 ,  H03F3/2171 ,  H03F3/45071 ,  H03F3/45183 ,  H03F2200/66 ,  H03G3/3042 ,  H03G3/3078

摘要： A control device includes: a differential amplification circuit that amplifies a difference with respect to an input signal; and a clipping circuit that is connected to an output side of the differential amplification circuit and clips an input voltage. The differential amplification circuit includes a plurality of switching elements formed of a GaN semiconductor, and the clipping circuit includes a switching element formed of the GaN semiconductor.

公开(公告)号：US09948259B2

公开(公告)日：2018-04-17

申请号：US15269147

申请日：2016-09-19

申请人： Lockheed Martin Corporation

发明人： James A. Johnson

IPC分类号： H04L27/08 ,  H03G3/30 ,  H04L27/06 ,  H03F3/19 ,  H04B17/20 ,  H04B17/27

CPC分类号： H03G3/3036 ,  H03F3/19 ,  H03F2200/294 ,  H03F2200/451 ,  H03G3/3078 ,  H04B17/20 ,  H04B17/27 ,  H04L27/06

摘要： Methods and systems for amplitude estimation and gain adjustment using noise as a reference are described. An example receiver can include an antenna and a front end amplifier coupled to the antenna. The receiver can also include a detector circuit coupled to the front end amplifier. The receiver can be configured to determine a power of a received signal at the antenna based on a gain of the receiver. The gain of the receiver can be determined based on a noise figure of the front end amplifier and a noise amplitude.

公开(公告)号：US09917607B1

公开(公告)日：2018-03-13

申请号：US15449619

申请日：2017-03-03

申请人： Oracle International Corporation

发明人： Xun Zhang ,  Dawei Huang ,  Jianghui Su ,  Chaitanya Palusa

IPC分类号： H04L25/03 ,  H04B1/16 ,  H03G3/30 ,  H03M1/66

CPC分类号： H04B1/16 ,  H03G3/3078 ,  H03G2201/706 ,  H03M1/66 ,  H04L25/03057

摘要： Embodiments include systems and methods for baseline wander correction gain adaptation in receiver circuits. Some embodiments operate in context of an alternating current coupled transceiver communicating data signals over a high-speed transmission channel, such that the receiver system includes an AC-coupled data input and a feedback loop with a data slicer and an error slicer. A baseline wander correction (BWC) circuit can be part of the feedback loop and can generate a feedback signal corresponding to low-pass-filtered bits data from the data slicer output and having a gain generated according to pattern-filtered error data from the error slicer output. For example, gain adaptation is performed according to error information corresponding to a detected relatively high-frequency data pattern following a long low-frequency pattern.

公开(公告)号：US09774308B2

公开(公告)日：2017-09-26

申请号：US14650330

申请日：2012-12-14

申请人： Telefonaktiebolaget L M Ericsson (publ)

发明人： Shaohua Li ,  Rainer Bachl

IPC分类号： H04W52/24 ,  H03G3/20 ,  H03G3/30 ,  H04B17/318 ,  H04W84/04

CPC分类号： H03G3/20 ,  H03G3/3078 ,  H04B17/318 ,  H04W52/244 ,  H04W84/045

摘要： The invention refers to performing an automatic gain control—AGC—with respect to a received signal comprising a plurality of consecutive subframes (S1 S12), comprising identifying subframes that are associated to a first subset of the consecutive subframes (S1, S3, S4, S5, S7. S8, S9, S11, S12), performing a first (10) signal power measurement with respect to the received signal during the first subset of the consecutive subframes, and performing the AGC according to the first signal power measurement. The invention further refers to a user equipment and to a corresponding computer program.

公开(公告)号：US09667212B2

公开(公告)日：2017-05-30

申请号：US14447321

申请日：2014-07-30

申请人： ISSC Technologies Corp.

发明人： Peng-Sen Chen

IPC分类号： H03G3/20 ,  H04B1/12 ,  H03G3/30

CPC分类号： H03G3/20 ,  H03G3/3078 ,  H04B1/126

摘要： An exemplary embodiment of a method illustrates a gain control method executed in a wireless signal receiver. The gain control method has the following steps. A wideband channel is continuously monitored to check whether an interference signal exists in a wireless signal. When the interference signal exists in the wireless signal, an interference received signal strength indicator is obtained. A front end gain of the wireless signal receiver is controlled according to the interference received signal strength indicator. When the interference signal exists in the wireless signal, the wireless signal receiver is prohibited from using a maximum front end gain.

公开(公告)号：US09608587B2

公开(公告)日：2017-03-28

申请号：US14749884

申请日：2015-06-25

申请人： FREESCALE SEMICONDUCTOR, INC.

发明人： Khurram Waheed ,  Steven M Bosze ,  Keith A Tilley ,  Kevin B Traylor

IPC分类号： H03G3/30 ,  H04L25/06 ,  H03D3/00

CPC分类号： H03G3/3078 ,  H03D3/008 ,  H03D3/009 ,  H03G3/3068 ,  H04B1/30 ,  H04L25/061 ,  H04L25/066

摘要： Method embodiments are provided herein for dynamically calibrating and adjusting a direct conversion receiver system. One embodiment includes applying one or more gain control signals to one or more gain elements of a receiver system, where the applying one or more gain control signals results in a gain change to the receiver system; in response to the gain change, determining whether the receiver system exhibits a DC (direct conversion) offset; and in response to a determination that the receiver system exhibits the DC offset, applying one or more DC offset correction control signals to one or more gain elements of the receiver system, where the one or more DC offset correction signals are configured to correct the DC offset.

公开(公告)号：US09595990B1

公开(公告)日：2017-03-14

申请号：US15158420

申请日：2016-05-18

申请人： Xilinx, Inc.

发明人： Hongtao Zhang ,  Geoffrey Zhang

IPC分类号： H04L27/06 ,  H04B1/12 ,  H03G3/20

CPC分类号： H04L25/03878 ,  H03G3/3078

摘要： A circuit for enabling an adaptation of an automatic gain control circuit comprises an automatic gain control (ACG) circuit configured to receive an input signal and to generate a boosted input signal. An average peak signal magnitude adaptation circuit is configured to receive an output of a decision circuit and to generate an average peak signal magnitude. An average peak signal target calculation circuit is configured to receive the average peak signal magnitude and detected peak signal magnitudes, wherein the average peak signal magnitude adaptation circuit generates a target peak signal magnitude. An AGC adaptation circuit is configured to receive an average peak signal magnitude and the target peak signal magnitude, wherein the AGC adaptation circuit provides an AGC control signal to the AGC circuit to maximize the effective signal magnitude within an acceptable linearity range.

摘要翻译： 用于实现自动增益控制电路的自适应的电路包括被配置为接收输入信号并产生升压的输入信号的自动增益控制（ACG）电路。 平均峰值信号幅度自适应电路被配置为接收判定电路的输出并产生平均峰值信号幅度。 平均峰值信号目标计算电路被配置为接收平均峰值信号幅度和检测到的峰值信号幅度，其中平均峰值信号幅度适配电路产生目标峰值信号幅度。 AGC适配电路被配置为接收平均峰值信号幅度和目标峰值信号幅度，其中AGC适配电路向AGC电路提供AGC控制信号，以使可接受的线性范围内的有效信号幅度最大化。